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Satellite TV Technology › Re: Solar Energy, A Complement To FTA by bigrovar(m): 12:10pm On Apr 23, 2017

JUO:
the manufacturers are all liars. My luminous 1.5kva Self-consumption is 40w, this is 960wh in 24 hrs. Believe me I have seen one unless 7.5kw cyber-power consume 350w. How do you expect your batteries to do 5 years with this?

The sukam falcon plus 1.6 kva 24v uses 25w against the 30w advertised in the manual. Its one of the reason I love that inverter.

earthrealm:
@juo & all, how do u calculate the self consumption of the inverter....wch device do u use?

I use a battery monitor with watt/Amp counter. Previously used a watt meter that comes with a shunt. The device is not bidirectional hence it can only read one way. I set it up between inverter and battery to read watts inverter takes takes from the battery. To know the idle load of the inverter. All I need do is

A: Turn off the load output of the inverter and check the watt meter readings.. Since the inverter becomes the only load on the battery the watt meter gives me its idle load.

B: Put an AC killawatt meter on the inverter out and read how much load in watt is on the inverter. Compare it to how much load the inverter takes from the battery. The difference gives me the inverter self consumption load.

Now I use the victron energy watt meter which is much more sophisticated than the previous device. This one is multi directional as it shows what goes into and out of the battery. The device easily shows me the inverter without stress. The former option is much cheaper though.

4 Likes

Satellite TV Technology › Re: Solar Energy, A Complement To FTA by bigrovar(m): 12:00pm On Apr 23, 2017

earthrealm:
@bigrovar most common inverters dont charge with 58v for a 4 batt setup, prag is even 13.3v, mustpower stated 14.8v but i dont see that when my batts are charging

We are saying the same thing

Satellite TV Technology › Re: Solar Energy, A Complement To FTA by bigrovar(m): 4:46pm On Apr 22, 2017

babaegun:
Hello guys,

What is the best solar panel inclination on a horizontal surface? Just want clarification. I learnt its equal to ones latitude and Nigeria is (Lat. 9N , 8E) which means the solar panel must be at angle 9 degrees.

Hope that is ok for Abuja.

Abuja is 81 degrees vertical tilt. That is the optimal inclination for a permanently mounted solar panel (oriented towards true south).

Satellite TV Technology › Re: Solar Energy, A Complement To FTA by bigrovar(m): 4:44pm On Apr 22, 2017

earthrealm:
so my 4 units of 200ah flooded batts are not performing well...after 2 days of just led tv, energy saving bulbs and 2 ceiling fans used intermittently..the voltage will drip to 48.8v, when fully charged, hygrometer reading shows electrolyte status is ok, and meter readings show similar voltage +/- 0.2, apart from a load tester...is there any way i can resolve this issue?

when hooked to the inverter and using normally, individual voltages are almost same with just 1 unit being 0.2v lower
they are lumionous flooded 200AH bought from a dealer here last year, i am expecting it shud last upto 5 days, hr after phcn goes..voltage quickly drops to 50.4v and then later settles at 50v after about 4hrs...with a load of abt 180 to 320w

My guess are those batteries do not get enough cycle charge especially absorption charge. Very few inverters can actually do proper and adequate absorption charge for flooded batteries.. Those batteries should have at least 58v charge for at least 1 hour (2 hours recommended depending on depth of discharge) during daily absorption charge. Not doing this would lead to Sulfation which I think is the case with your battery (hence why hydrometer says all is fine)

You might want to change your charging source to something which can properly charge your battery.

earthrealm:
another thought occured to me: who else use mustpower 48v or even 24v?.
on setting 6 -- open lead acid battery, wch i normally use...the batt display voltage rarely goes over 52.8v, but going by the manual it shud hv been 14.8 x 4 = 59.2v, is this normal?...
its only when am on equalize mode that it reads 61.2v, instead of 15.5x4= 62v.
fellow mustpower startlite users abeg come chook mouth for this mata

Well you just found the culprit right there its either you (if your inverter supports it) use a custom setting with absorption voltage set to battery specification or get a second charging source which would support the settings for your battery.

earthrealm:
nope the mecury setup is a different setup..its in the village, uses solar to charge, no phcn.
have no clue how to check the charging system, i know it charges...based on the display screen charging current and voltage.
will remove the desulphator and see if anything changes

The mercury is performing better not because it is a better product but because it is getting the proper charge.

efuro:
In addition to ur earlier post. I know some enthusiast will take me on it but it may fall true dat some of these ba3 are over-rated for Nigerian market. 200AH ba3 may actually be 180AH or less even with SON seal or LOGO.

BINGO. BTW this is not just a Nigerian factor. In fact a research which I was part of in France showed that most batteries do not have near the capacity displayed. The problem is: It is very hard for manufacturers to guarantee battery capacity. Battery capacity varies by so many factors hence many manufacturers work with margin of error. During our test when we go 5 lead acid batteries and used special equipment to discharge them at a constant Amp at c20 in 25C temperature. Only US battery, and Trojan came tops with +5AH of stated AH. some batteries had a deficit of close to -80AH from stated capacity.

You can image the situation in Nigeria where we don't even have regulators. I usually assume my 220AH tubular battery is actually 180AH and I discharge it so that 50% DOD is actually 90AH not 110, People should apply similar caution with their batteries.

4 Likes 1 Share

Satellite TV Technology › Re: Solar Energy, A Complement To FTA by bigrovar(m): 5:39am On Apr 20, 2017

emmaniche:
Good evening house, I’m new into green energy. But I’ve been mandated to make a quotation for the installation of solar energy at a particular location.
My main concern is the client in concern is really interested in monitoring the solar setup over cctv and if possible controlling the setup. i.e the charging and discharge rate, watts stored, battery level, switch time from NEPA to solar.
House is this really possible as I’ve been mandated to research into this and give back a quotation for the projected to be kick started.
Thanks very much awaiting feedback from u guys. God Bless.

You don't need a cctv to monitor solar setup. There are controllers with very good remote monitoring and controller systems deeply integrated into them. They give u ability to see what your system is producing and ability to even adjust your settings from any where in the world.

Regarding change over. Its all depends on budget. You could get a local fabricated or again there are solar controllers and inverter with deep integration and ability to switch to grid based on preset threshold.

Short answer: It is very possible.

Satellite TV Technology › Re: Solar Energy, A Complement To FTA by bigrovar(m): 12:00pm On Apr 17, 2017

chris81964:
We have not experienced the failure with the 30 amp 100 Vunit. However the higher voltage units are failing. Fangpusen is aware and they have not provided a solution.

am currently making progress in a bid to reverse engineer this trend. What I need now to test of my fix can work is an older firmware file preferably v16 to 17v. The victron connect software is unable to do downgrades. However the idea is to trick it into doing a downgrade by making it think it is installing an updated firmware hopefully this can reserve the slow poison installed on the controllers. If anyone has an older firmware file (usually with .dup extension) kindly buzz me.

2 Likes

Satellite TV Technology › Re: Solar Energy, A Complement To FTA by bigrovar(m): 2:38am On Apr 14, 2017

auxanosolar:

https://www.youtube.com/watch?v=DUfi8K3lGw0

no Nepa no wahala...... at auxano energy, we give u the best quality at affordable price.....a trial will convince you

Not like we don't want to buy Nigerian. Just as always marketing and presentation of most Nigerian companies are just abysmal. You can imagine going to auxano website and not a single information on price details or specification on their product. All you have there are pictures sekena. How can I buy an inverter without having detailed knowledge on its features, specifications etc. No sales outlet no price no dealership no nothing. Its takes more than appealing to patriotic favor to win anyone here. You have to do more with information on what u produce

3 Likes

Computers › Re: Ubuntu Linux by bigrovar(m): 5:58pm On Apr 08, 2017

4llerbuntu:
Except that's not what they are doing.

Read between the lines. They are nuking the entire consumer desktop thing.

They just can't drop it outright because they have support agreements to honour for a few years.

They sacked 3/4 of the desktop team and all of the UX team.
That's not a company focused on "going back to what it used to be"

Just keep enough people to maintain the LTS for it's shelf life and do a basic respin of gnome that can serve as a base for anyone who want to use Ubuntu with a GUI.

Best case scenario is a Red hat type of thing. There's a reason you don't hear anyone talk about redhat outside Enterprise.

The real problem is this is taking the whole Linux consumer land back several steps . There's a reason why most tech companies don't take Linux seriously enough to support it. Ubuntu has been the only one that's gained a bit of traction to get support.

The limited GPU drivers support Linux gets is directed at Ubuntu as a target for instance. Even Skype for Linux is mainly targeted at Ubuntu. It's easy for everyone to have a standard base. But the community and GNU folks decided all out war was the best way to handle Ubuntu.

Who is going to waste time and resources in doing stuff for Community Projects? U think Nvidia and co are going to continue wasting effort producing blobs for Linux?

Even projects like Steam are in a spot of bother now. They now have to fork and maintain a custom Linux from scratch rather than just put add-ons on ubuntu.

Because best case scenario is that Ubuntu itself on the desktop becomes a community project. Mark has decided he has lost enough money supporting a project without traction and a lot of opposition.

Great day for Linux tbh. Nice job everyone

PS: spare a thought for those Linux Mint idiots who used Ubuntu as a base and kept spreading FUD and trying to say they were better than Ubuntu.
Now there's nobody to hold their dicks for them whilst they pee. Wankers

This is a grim assessment of events .. Too grim.. The Linux world would lose more from if a company like redhat pulls out of Linux (that's not going to happen)

Canonical cause was noble and they did help bring some momentum to the Linux desktop. However they also made some reckless mistakes particularly choosing to go the NIH (not invented here) route with many project rather than rally with the community to create a gold standard. Imagine the resources wasted on Mir, Ubuntu Software Center to name a few.. Worse mistakes were made and resources wasted on moon projects like Ubuntu phone, tv, tablets etc.. Ubuntu lacked the experience money or man power to take these project to the finished products.

From time biggest money maker for canonical has been Ubuntu in enterprise yet very little was done to improve things on that front. I know because I spent over 8 years of my life trying to get Ubuntu to work on an enterprise environment.. Its a pain. The Ubuntu server and cloud is another huge maker. Yet vast amount of canonical fund were wasted on unnecessary things.

Ubuntu was best known for adding polish to gnome desktop.. Things started going down hill when there started down their own road.. They lost a vast amount of their community and lost lots of good will.. Mark Shuttleworth condescending attitudes to negative feedback didn't help things.

Linux desktop is save.. Even at its height Ubuntu general contributions to advancement of Linux on desktop in terms of codes was less than 2% .. The burden usually. Lies with Redhat.. Today Linux boast of the best network management utility in Graphical desktop thanks to works by redhat employees.. Same people also work on print management, graphic driver support (the fedora guys did an amazing job on getting open source driver for nvidia) Canonical dropping from the Linux desktop won't do more than mandrake fall did for desktop Linux.. Distro come and go life goes on.

Linux is not doing well on the desktop which is not a bad thing because desktop computing is not particularly doing well. Mobile is the new desktop and Linux with android has that cornered.

Canonical has come back to their senses too bad after millions of dollars where spent fooling around. Canonical will not abandon Desktop Linux.. They would go back to doing what they do best. Add polish to jobs done by redhat and co.. Hopefully they can hand Ubuntu to a truly independent foundation and have it managed by the community keeping some guys around to sort out bugs and add further polish.

Not a bad news but a chance to refocus and do the right thing. Ubuntu made desktop Linux popular and that goodwill will always remains with it.. This announcement won't change that.

Satellite TV Technology › Re: Solar Energy, A Complement To FTA by bigrovar(m): 8:38am On Apr 08, 2017

Day 3 with zero grid power ... My battery state of charge at about 7am after another whole night of use

1 Like

Satellite TV Technology › Re: Solar Energy, A Complement To FTA by bigrovar(m): 8:35am On Apr 08, 2017

Chuckdee:
Hi all,

I want to share my setup with the house so as to serve as a source of motivation to new DIYers that would come across this thread because it's the same way i got the needed info to do mine. I have read, watched and studied so much in the past years as regards to solar and renewable energy that I was able to design, procure and deploy my setup all by myself and with help of a couple of friends. I did make use of some carpenter guy to help mount the panels on the roof following my instructions through, and also got my electrician to run load separation cables for me. However, there are members of this forum who have been immensely helpful to me by answering my plenty questions and worries, I am very grateful to Mr. Chris of AWPS Renewable Energy, your love n passion for the job is unquestionable!, Dunka, your motivation is next to none, Frankie the able supplier and a brother, George_D da boss!, thanks for the emails! and all the contributing members here, y'all are the best. it has been a very wonderful experience and I thank God for the opportunity.

My rig consists of:

15 X 300W yahSun Mono Panels (4,500W)
8 X USL16EXC2 6V L16 360AH USA Flooded Batteries
1 X Midnight Solar Classic 150 96A MPPT Charge Controller
1 X Magnum Magnasine 4300W Pure sinewave Inverter
1 X Magnum MERC Advanced Remote
1 X Trimetric 2030A + 500 Mv Shunt
1 X 48V BLS Desulphator
1 X 6Ft Earthing Rod
2 X Midnightsolar MNSPD Surge protector (1 for AC side, 1 for DC side)
1 X 10KVA Servo Stabilizer ( Pre-owned for about 4 years now)
4 x Complete galvanized aluminium Roof Mount
Various quality Breakers, Fuses and Accessories.

EXTRAS:

1 X TP-Link AC750 Dual Band WiFi Range Extender, Extends WiFi to Smart Home & Alexa Devices (RE200)
2 X TP-Link Smart Plug w/ Energy Monitoring, No Hub Required, Wi-Fi, Works with Alexa, Control your Devices from Anywhere (HS110)
1 X TP-Link Smart Wi-Fi Light Switch, No Hub Required, Single Pole, Control Your Fixtures From Anywhere, Works with Amazon Alexa (HS200)
1 X Amazon Echo dot 2nd gen.
.....More on those later.

It is important to state that these items were acquired over a long period of time, infact, it took me one year plus of self disciplined money management, savings and forfeiting so much to make this happen maybe because of my taste in quality but from experience, i have learnt to go hard and go once! at a point i was sending money monthly to Frankie so as to secure a price point on the panels when the dollar was climbing like crazy. The most expensive item to get were the batteries as you had to buy them once. My candid advice to anyone is to start small, make a checklist of needed items and bit by bit, you will be striking off the ones you get as time goes on.

Panels were run in series/parallel strings of 3X5 to a combiner box with 5 breakers. All panels, inverter, CC and Combiner box were Grounded. 6MM ammoured cables from panels to combiner box, 10MM from combiner box to CC. Battery interconnect cables, CC to battery bank, Inverter to battery bank all 50MM Extra fine stranded Welding cable. Although a little more expensive, these cables handle any load comfortably and have never felt a tad warm to the touch at all and trust me, i have pushed them to the max all in the name of testing.

Seeking to achieve an 'almost' off grid setup, I went for that much number in panels and the result of having an array sized to cover the worst time of year, is that you get quite a bit of spare power at peak sun times. Therefore it makes sense to divide your loads up into base loads and opportunity loads. My base loads are 1 large Refrigerator (on a timer running 7AM-5PM daily), 1 always-on 24/7 Freezer, water pumps, computer gear, chargers of all sorts, lighting, security lights consisting of 8 X 15W energy saving bulbs (looking to change them to LEDs of less than 10W if i find them), an always-on Apple MacMini I use as my media server running a PLEX server serving movies to all TVs and smart devices like Roku box, Amazon fire Tv stick, and one Xiami Mi Android TV in the house, 2 standing fans, as well as sundry occasional appliances,power tools and other usual stuff; washing machine, iron, juicer, blender, microwave and hair blowers.

Most mornings, I wake up to a battery bank that is between 68-75% except on days i play the PS4 pro or xbox1 all night, i have seen 66% in the mornings, still under 50% DOD so not too bad and I know that my batteries have not yet been broken into very well. By 1-2PM batteries are already in float so the excess power are dumped into opportunity loads like running ACs, boiling water and cooking using the Induction cooker running at max power till like 4PM. I have seen max PV output of 3600W+ and my area in Abuja is very dusty, so many untarred road around my hood, panels were covered in dust from the next day after installation! and we have not seen any rains yet so i believe there is tendency for better output when the rains come.On average i harvest around 14-18Kwh daily. I have been running the system TOTALLY off-grid since the 10th of March.

I used the Wifi extender to extend my WAN and use the Ethernet jack to plug in the Midnight Classic CC to my home network, so i can monitor from PC and phone w/out having to run a long lan cable to my router inside. Got for less than $20 on amazon and works like a charm.

I use The smart plug to plug in my fridge and set it on a timer so it automatically comes on @ 7am and shuts off by 5PM daily. I also use it to monitor energy consumption in real time or over a period of time, very helpful to calculate all your energy consumption.

The smart switch i use to automatically turn on the whole security lights @ 7pm and turn of @ 6:15 am daily. and just like the smart plug, they both can be controlled from anywhere in the world from the app as long as u have internet and i have tested this, it works perfectly.

I am a geeky kinda guy so I love me some home automation and i have had some Phillips Hue lighting in the house, all devices in my Home theater setup are controlled using just a single remote-- The Logitec Harmony elite and all these devices can be controlled via voice with Alexa on amazon echo dot, pretty neat and works for the TP link switch and smart plugs too. I hv 10 Terabytes of Movies, TV series and Anime all in HD and running perfectly on the media server 24/7 with the beautiful interface of PLEX (guys u need to check it out, its simply your own NETFLIX @ home) For internet i use the NTEL unlimited package so everything is always ONLINE... I share my home wifi for my neighbors and they can watch movies on their phones and tablets as the media server can comfortably handle multiple media streams at once without issues. All these are possible because the sun gives me free Energy!

I cannot state how lovely it is to have uninterrupted power supply, something people in other countries take for granted. I think going solar is the best way forward for us here.

Ok!Sorry guys for the long read , however, Your comments, criticism, corrections and questions are welcome..

This set a gold standard for setting up a smart and energy sustainable home. Massive congratulations and thanks for sharing.

I never knew Amazon echo would work in Nigeria (does it have to be always internet connected ) also how did you setup your 10terabyte hard drive array? Are you use a turnkey device or built one? I hope to setup a media server with 10 tera but my aim is to use disk arrays setup to raid 5 for redundancy...That's will eat lots of 2 terabyte disks and would require a server with 10 disk drive bay. Kindly share.
FYI currently use kodi (formerly xbmc ) as media center. It is the project which Plex is based. Running for over 5 years now.

2 Likes

Computers › Re: Ubuntu Linux by bigrovar(m): 8:23am On Apr 06, 2017

4llerbuntu:
Crazy news today.

Ubuntu is abandoning the Unity desktop and going back to Gnome.

https://insights.ubuntu.com/2017/04/05/growing-ubuntu-for-cloud-and-iot-rather-than-phone-and-convergence/

For me, this is where I definitely part ways with Ubuntu. I am terribly disappointed.

I really dislike the Gnome desktop so .

Guess KDE neon has me now.

I'm so sad. It's weird, I never thought I was attached to it like this.

I can never trust anything Canonical does or promises anymore.

Thats not even the Big news. The big news is that Ubuntu is divesting from the LInux desktop and instead focusing on Cloud and IoT. This makes a whole lot of sense to me and I think the Linux Desktop would be better for it here is why:

Too Much Not Invented here syndrome:

Canonical's before now was mostly focused on the deskop and this meant lots of its resources was thrown into making a LInux desktop experience that would easy to use for the average joe. Canonical rather than go with the crowd sometimes around 2011 decided to go its own way and create its own unique experience outside what is already available in the free software ecosystem:
It develop Unity in place of Gnome
Ubuntu Software Center In place of Gnome Software
Compiz In place of Mutter,
Mir Inplace of Wayland etc

For 6 years canonical wasted money trying to reinvent the wheel .. It was really tragic for free software because this money should never have been so wasted if Canonical had instead worked with existing projects.. This new turn in direction means canonical can do what they do best. bring out the best in Gnome.

Divesting from desktop would also allow the company focus on its area of commercial strength being a cloud company. IoT is a new frontier for computing and the company stands a chance to compete in that space too..

In all its good that the company finally taking the right turn and getting out of wasteful efforts..

Satellite TV Technology › Re: Solar Energy, A Complement To FTA by bigrovar(m): 10:36am On Mar 27, 2017

babaegun:
@bigrovar

Hello. I need to contact you. I am in Abuja too. Need a little guidance on Solar. Need to upgrade my setup. Will dm you my phone number. Just flash me and I will call.

Thanks.

Hello, buzz me on twitter @bigbrovar http://twitter.com/bigbrovar

Satellite TV Technology › Re: Solar Energy, A Complement To FTA by bigrovar(m): 7:17am On Mar 24, 2017

chris81964:
The dollar is now about N400 to 1. When will our suppliers adjust their prices to reflect that reality. They are all silent.

Satellite TV Technology › Re: Solar Energy, A Complement To FTA by bigrovar(m): 4:36pm On Mar 19, 2017

zeestone99:
I believe u nd i agree, either wood or wall, a setup shud be neat. ll also put ur suggestion in mind 4 review... Cheers and hapi Sunday

we agree.

Satellite TV Technology › Re: Solar Energy, A Complement To FTA by bigrovar(m): 9:24am On Mar 19, 2017

zeestone99:
Nice upgrade for a 24v, pls try to mk ur setup neater, i see cables flying, no ba3 rack also. You can check n like our Facebook page for beautiful installation pictures and solar tips. Http://facebook.com/monzpowersolutions

I know that its more aesthetically pleasant to mount a charge controller on wood.. I have always preferred mounting mine on the wall.. Especially fanless controllers. That way the contrate acts as an extra layer of heat absorption.

Satellite TV Technology › Re: Solar Energy, A Complement To FTA by bigrovar(m): 5:58pm On Mar 17, 2017

TSHIRT2:
The ff is my next set up and is only 4 fridge and freezer.
The fridge is 70w while freezer is 140w.The setup
60amp i tracer mppt,600w of mono panel,2*200ah,and 1.7kva 24v inverter.
my question,is d inverter okay 4 d setup,is d panel okay too?if not can i combine it with 4*125w i'm using already?.ur contributns will be appreciated.

Four freezer or for freezer?
everything depends on context of your load and how long you plan to run said load on the system. The general rule of thump is never use more than you can easily put back in the system. When I had just 480w panels, my load was different from now when my panels are 880w. I made sure to keep an eye to ensure my battery voltage never goes below 12.5v.

You location would also play a huge rule. You can't compare panel generation in the northern part to what you get in the south

Satellite TV Technology › Re: Solar Energy, A Complement To FTA by bigrovar(m): 5:51pm On Mar 17, 2017

DMerciful:
House,

One out of two of my LiFeO4 batteries arrived today, hopefully the second arrives next week or upper week so I can do the required testing and share the review. Coming soon

CORRECT!!!!

House is patiently waiting

1 Like

Satellite TV Technology › Re: Solar Energy, A Complement To FTA by bigrovar(m): 1:45pm On Mar 16, 2017

DUNKA:
Please what is the difference between this and the Fangpusun Outback clone?

Pretty much the difference between Victron Energy bluesolar and Outback Flexmax. The latter has built in fan for cooling while the other relies mainly on cast aluminium for heat dissipation. Fangback has built in display and much better historical logs (180 days) Fangtron doesn't come with built in display you would need to buy an external display. You would need Fangback

Satellite TV Technology › Re: Solar Energy, A Complement To FTA by bigrovar(m): 1:42pm On Mar 16, 2017

Here is a detailed component review and comparison of the Fangpusun Flexmax and Bluesolar MPPT controller http://www.quan-diy.com/misc/scc/fangpusun.htm

Satellite TV Technology › Re: Solar Energy, A Complement To FTA by bigrovar(m): 12:45pm On Mar 15, 2017

efuro:
Sir Chris are the inverters out of 2 yrs warranty ?

subjectively, losing both functions of CC and DC/AC conversion is
the reason why I don't like fanciful hybrid inverters (even if you out-size loads).

imagine batteries have to wait till repairs are done (think of Sulfation at the nodes if left for weeks)

exactly. Its one reason why I am not too keen on all in one. All eggs in one basket things.

Satellite TV Technology › Re: Solar Energy, A Complement To FTA by bigrovar(m): 12:44pm On Mar 15, 2017

chris81964:
Axpert Inverters
Do we have anyone that repairs them? We have a few that have failed and need the mosfets replaced. Please whatsapp me if you know any good repair people +19739981590.
Thank you.

Zinox are the official representatives of Voltronic (OEM of axpert) in nigeria. You might want to try TDPlus zinox subsidiary. There should get it fixed. You can contact me back stage (twitter) I know one of their reps whom you can reach out to.

Satellite TV Technology › Re: Solar Energy, A Complement To FTA by bigrovar(m): 10:35pm On Mar 12, 2017

pdozie:
I quite agree. Actually concern is how to set the cutoff..the Sukam inverter I use has no such setting.
If there is a way of setting the cutoff on the inverter please do share.

I plan to upgrade the panel size first , then the battery bank. It was during the panel upgrade that the issue CC smoking came up . And I quite agree with your analysis suggesting that the CC is maxed out.

I definitely have to upgrade the CC because 3 new panels are lying on d roof wasting. More so over time, I will still add few more panels

before upgrading. why not spend some time to optimize your system better from generation to load side. From what you have posted so far your current system is not well optimised, your panels are generating well below their rated capacity, and your battery is being drained too close to the grave meaning your load could also use some optimization. Take some time to check your connection, panel orientation and such. Also take a look at your load.. might even be cheaper to sell of some energy inefficient appliance and get something newer and more efficient.. might even give u better result than buying a new panel.. give it a thought

1 Like

Satellite TV Technology › Re: Solar Energy, A Complement To FTA by bigrovar(m): 10:29pm On Mar 12, 2017

pdozie:
I quite agree. Actually concern is how to set the cutoff..the Sukam inverter I use has no such setting.
If there is a way of setting the cutoff on the inverter please do share.

I plan to upgrade the panel size first , then the battery bank. It was during the panel upgrade that the issue CC smoking came up . And I quite agree with your analysis suggesting that the CC is maxed out.

I definitely have to upgrade the CC because 3 new panels are lying on d roof wasting. More so over time, I will still add few more panels

LVD is can be a lousy unreliable means of determining state of charge for the following reasons: If your goal, for example, is to never go below 50% SOC, then you can set your LVD to 12.1 volts. If you run a very small load there will be very little voltage sag and by the time the battery voltage drops to 12.1 you really will be at 50% SOC. On the other hand, if you are running a large load there will be voltage sag and the LVD will shut off the inverter and then the voltage will rebound to some voltage that is higher than 50% SOC.

Battery voltage is a product of many factors including size of load, temperature etc Example: suppose your resting battery voltage is 12.5, indicating 80% SOC. Then you turn on a 200 watt load and the voltage sags down to 12.24 volts. Then you turn off the load and the voltage rebounds to 12.5 volts. You did not go from 80% SOC to 60% and then back to 80%. You were at 80% all along.

In the end, try to design your system to use only ~25% (to 50%) depth of discharge per day.... Usually, trying to automate a low voltage shutdown that protects your batteries takes a lot of time and money--Plus a few problems along the way. Designing your systems and loads to stay within your desired window is best.

5 Likes

Satellite TV Technology › Re: Solar Energy, A Complement To FTA by bigrovar(m): 9:43am On Mar 12, 2017

nannymcphee:
Pls i want to ask,

Inverter system-24v

Battery-200Ah

Total load-500W

Assuming my panels are 250w
Vm-30.6v
Voc-37.4v
Isc-8.92A
Im-8.17A

My CC is

Atracer 100v 40A
1040w Max rated power
3120w Max array power

1.what is the maximum number of panels I can get

2.what will be the best array configuration ?

3. What will be the charging output current to my battery

4.Please how does this whole setup work?

a.During the day, my load gets supply directly from the CC

b.Gets supply from the battery, then it's replenished from the CC as it's being used

Thanks, I await answers, i'm also aware that these questions must have been previously answered.

I have gone through all the post, it is still not clear to me

CC
JUO
Bigrovar
Dmerciful

Your load figure should include how many hours of the day you intend to run that load. running 500w load on a 24v battery system would lead your battery to an early grave (especially when run at night) The recommended discharge rate for a 200ah battery rated at c20 is 240w (500w discharge rate is more than twice that) discharging your c20 batteries at that rate means it is effectively no longer a 200ah battery but a 150 - 100ah battery depending on the peukert rating of the battery. even if the battery is rated c10 500w is still higher than recommended discharge which in your case is 480w.

You should not that most batteries in the market with (exception of makers like trojan, us batteries and some other top battery makers) most batteries out there have exaggerated capacity. I usually assume the actual capacity of most 200ah batteries in Nigerian market are actually 150ah - 180ah and factor that when determining rate and depth of discharge.

It is important you clearly state your load in terms of total load in watt and watt hours. both are very different and also very important factor in design of an optimal setup.

Satellite TV Technology › Re: Solar Energy, A Complement To FTA by bigrovar(m): 4:16am On Mar 11, 2017

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management of nairaland is a joke.. I was once banned here twice for a post that was purely educational and inline with the discussion here.. yet something like this was allowed to be posted.

pdozie:
Got the watt meter yesterday. Very interesting recording my readings. One 'small' TV the kids use often read 137W while the big one I usually chase them away from read 78W !!

The freezer starts with 326W but goes down to 240W in less than 10 seconds.
The sowing machines my wife run starts with 576W and goes down to 132W steadily.

For the devices that start high and then normalizes at Low watts, what is the advised time to operate them. Because of the high power the draw at startup, will be advised to still put them on inverter when sun is getting down - say 4 to 5pm? (Even though they operate at much lower Watt after start up)

Meanwhile, if anyone has a spare 40 to 45A MPPT controller 48v, kindly buzz me. Got new panels to add but my controller has maxed out

Cheers

what is the size of that freezer?

Foreign Affairs › Re: A Thread For Nazi and WW2 History Enthusiasts by bigrovar(m): 10:58am On Mar 07, 2017

donestk:
Brilliant analysis......

The fuhrer was just obsessed about Staningrad prolly cos of Stalin. Truly the Soviets are fanatical especially displayed in the Battle of Stalingrad. Do you know that during the Battle of Stalingrad, the life expectancy of a Soviet solider was 24 hours?

They fought with insane unbelievable tenacity.., makes you think for all it's fault communism those know how to mobilise and get the best out of a people. One of the most fascinating tales from Stalingrad is the "Night Witches" The women military aviators of the 588th night bomber regiment. This are volunteer women who flew harassment precision bombing raids against the Germans. They flew mostly old wood planes at night.. An attack technique of the night bombers was to idle the engine near the target and glide to the bomb release point, with only wind noise left to reveal their location. German soldiers likened the sound to broomsticks and named the pilots "Night Witches." this heroics ladies often flew without parachutes.

5 Likes

Foreign Affairs › Re: A Thread For Nazi and WW2 History Enthusiasts by bigrovar(m): 7:37am On Mar 07, 2017

The general misconception is that Germans lost to the Russian winter. i.e Russian winter played the biggest role in the Germans losing out to Russia. This is not true. Yes the Russia winter played a role but the biggest reason why Germany lost to Russia was due to Hitler's sense of invisibility, isanity and extreme arrogance. Germans went into Russia believing they were in for a swift victory the likes experienced in Western Europe. They considered the Russian to be of a lesser class of people who would surrender in droves under the Blitzkrieg. They expected to to be home by Christmas (a 6 months campaign)

This arrogance made the Germans commit the following tactical error:

Started the campaign without preparing for the Russian winter: The men had no winter clothing, their hardware had no provision for coping with the russian winter.

They completely under estimated the fanatical defends of the mother russia by the Russians who in many instances fought to the last man.. This type of resistance was alien to the Germans who were used to mass surrender once a you outflank and surround an army.. it is suppose to just give up and surrender. The Russians choose not to play to that script and instead fought with the skin of their teeth even when all hope seems lost. Germans often find themselves surrounding and then having to take out the Russians from every inch of land leading to very high attrition from the former.

No room for reserve, Arrogance allowed the Germans to throw in all they had.. because they were assured of victory, they made no room for reserve. Stalin on the other hand used his reserve very well. Unleashing them on the wary Germans time after time at just the perfect moment.

Badly trained and equipped flanks. The Germans rear guard and flanks were often guarded by poorly trained, ill motivated and equipped Hungarian ally. The Russian on many cases especially in the battle for Stalingrad concentrated their fire power on the German Hungarian flanks.. decimating them with their multi rocket launcher before encircling the 6th army (Germany never recovered from that loss)

Hitler's insanity halted the German advance on Moscow, allowing the Russians enough time to prepare a defence. Many German general would go on to say Moscow was the beginning of the end for the German eastern campaign.

Also Hitler's obsession with Stalingrad, a city with zero strategic value but sucked in lots of men and resources which should have been heading towards the more strategic oil fields of baku.. Hitler insanity was in full display when he ordered the 6th army not to attempt to break out of their encirclement even when the opportunity arose. Promising to supply the troops by air.

Even at the battle of the kursk Hitlers delay and constant postponement allowed the Russians to have time to a well laid out plan.

in all these Winter role was just an enabler for the Russian's

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Satellite TV Technology › Re: Solar Energy, A Complement To FTA by bigrovar(m): 5:23pm On Mar 06, 2017

DMerciful:
You can power your fridge or freezer with 1190W without issues. Be courageuos! whats the worst that could happen? inverter shows overload fault and you switch it off.

He should just try to turn the freezer on first thing before any other load.. Also give the Freezer some time in-between going off and turning them on. Usually around 10 minutes. My 1200w inverter powers The freezer (150W) and Fridge (80w) and runs them comfortably. Although the freezer gets powered first before the fridge. Also I sometimes turn on the gen to start the freezer and fridge.. turn on the Inverter and then turn on the gen. That way the gen those the heavy lifting.

1 Like

Foreign Affairs › Re: A Thread For Nazi and WW2 History Enthusiasts by bigrovar(m): 12:01am On Mar 06, 2017

donestk:
Insightful

Yes o.. western writers would have us believe that WW2 was about western Europe when in fact the campaign in the east made the western campaign look like a mere street brawl. The type of savage fighting and battle of attrition that took place in places like Stalingrad, Leningrad, Rzhev (Known as the meat grinder) was a complete far cry than the almost gentleman campaign in Europe. Some of German most battle hardened men fought in the east. The guys who fought at Normandy, and led the Ardenne offensive were relatively green and inexperience compared to the guys tired down in the east.

3 Likes

Foreign Affairs › Re: A Thread For Nazi and WW2 History Enthusiasts by bigrovar(m): 7:20pm On Mar 05, 2017

As much as people love to go on and on about ww2. ww1 was the real deal. Made ww2 look like childs play. WW1 also had the biggest effect on geo politics.

1 Like

Foreign Affairs › Re: A Thread For Nazi and WW2 History Enthusiasts by bigrovar(m): 7:19pm On Mar 05, 2017

panafrican:
Why didn' t Hitler invade the UK and why did the German army let the British escape at Dunkirk in 1940?
Any idea?

The german were more concerned about the eastern front in ww2 than UK which was of little strategic value. The idea was to contain the brits (most considered them too down to pose a serious threat - huge mistake) The eastern front is where the juice is. It is where Hitler hoped to create Lebensraum.. Living space for the german race. Unlike other European powers the germans have a very small land mass and very few colonies. Hilter note that to be respected as a world power you need huge land mass. If there is anything Russia has in abundance.. It is land. German were suppose to stroll into the mostly under developed mostly peasant country with little industrial capabilities and a largely under equipped army.. It was suppose to be easy pickings.

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Satellite TV Technology › Re: Solar Energy, A Complement To FTA by bigrovar(m): 7:00pm On Mar 05, 2017

chris81964:
Crest factor of 1.5 is the amount by which it can surge. 1190 x 1.5.

dapsyra:
The Crest factor of a sinusoidal current waveform is 1.414.

An Inverter with crest factor of 1.5 cannot handle 5 times its rated power. It can only handle 1.06 (1.5/1.414) times its rated power for a very short period specified by the manufacturer in the datasheet.

sorry I meant 5:1 (as stated by OP) and not 1.5. 5:1 means ratio of 5 to 1. some inverter makers use 3:1, 5:1 to represent that surge factor (probably because its more user friendly) despite I doubt any inverter can do 5 times its rated output power.

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