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Makavele's Posts

Nairaland Forum › Makavele's Profile › Makavele's Posts

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Satellite TV Technology › Re: Solar Energy, A Complement To FTA by makavele: 5:15pm On Apr 25, 2018
NiyiOmoIyunade:
Now you know what it means to have a good charge controller at work grin grin grin in tandem with a properly mounted and oriented PV array.

Find a blower fan to provide additional cooling to the MorningStar's heatsink - experiment with a normal house standing fan for starters and report back what you see performance wise.
For space & energy sakes . . a normal house standing fan would be an overkill . .
he could use a simple USB/DC fan mounted close to the controller . . kapish

I happen to use the 3rd one (first row) and it has been superb so far.

edit: you can cut off the USB end and extend the wires to your heart's desire.

Romance › Re: Guy Buys A N15M Mercedes Benz E350 For His Girlfriend (Photos) by makavele: 10:29pm On Apr 24, 2018
36govs:
hope the picture below , will allow you sleep
Tiwa savage grin grin grin
Computers › Re: Inverter Users : Lets Have Your Experience by makavele: 8:23pm On Apr 24, 2018
duwdu:
The question was for two batteries total, (if you'll check the requester's original post) for a total capacity of 4800 Watts, hence my own more than one references to Both batteries, and 2400 Watts at 50% draw down from both batteries together. No?

........
P34c3
.....
...

Computers › Re: Inverter Users : Lets Have Your Experience by makavele: 8:21pm On Apr 24, 2018
duwdu:
, . . For example, if your TV is rated 50 Watts, then you should aim to run it alone for 200 ÷ 50 = 4 hours, at full blast.

.....
...
FANTASTIC RUBBISH !!!
Satellite TV Technology › Re: Solar Energy, A Complement To FTA by makavele: 9:24pm On Apr 22, 2018
durumibaka:
[quote author=durumibaka post=6692124 Someone told me that it is possible to intergret solar panel with a ups but i wnt to knw from specialist in this forum weither it is possible and how to go about it...( yes i have a charge controler and a battery)
if u have got a charge controller and a battery bank, hell yeah, it would definitely work; but the ups isnt so efficient , modified sinewave and all, zero ventilation, small transformer
but who cares, right?
Autos › Re: Registered Range Rover Sport 07 Upgraded To 012... by makavele: 2:22pm On Apr 22, 2018
Linkwire:
What’s wrong with it huh Don’t tell me nothing without some compelling argument. Give me your best sales pitch
Seconded
Autos › Re: Registered Range Rover Sport 07 Upgraded To 012... by makavele: 9:23pm On Apr 21, 2018
, 5 nkor?
Autos › Re: 9units Of 2007 To 2010 Model Toyota Camry Xle Fully Loaded Toks by makavele: 5:54pm On Apr 19, 2018
Bros d bros . . .

You for try zoom in on the windshield make we for do the needful grin grin

I fear who no fear you !!!
Computers › Re: Inverter Users : Lets Have Your Experience by makavele: 9:10pm On Apr 17, 2018
Load:

42" LED Tv: 110W
GoTv decoder: 15W i guess.
Ceiling Fan: 70W


Total: 195 W + 10% for losses due to conversion and inefficiences
: 195 + 19.5 = 214.5 or 215W round figure.

Energy consumption: 215 Watts per hours = 215 Wh

You said to be run during the day; you didn't mention hwo many exact hours.

Let me guess 7 AM - 6 PM = 11 hours

Gross energy consumption = 215 W x 11 hours = 2365 Wh or 2.4kWh

Battery required:

At 50% DOD (economy level):

2365 Wh x 2 = 4730 Wh

Adding inefficiency factor: 4730 Wh / 0.8 = 5912.5 Wh

Using 12V batteries: 5912.5 Wh / 12V = 492.7 Ah

Let's round it up to 500Ah; which means you will need either:

1 unit of 12V 500Ah battery, or
2 units of 12V 250Ah batteries (more common), or
5 units of 12V 100Ah batteries

The choice is yours.

Now for Solar Panels:

Typical sun hours for Lagos is about 5 hours; pray no bad weather.

So we need that battery bank to be recharged completely in about 5 hours.

Calculations for only 50% DOD

5912.5 Wh / 5 hours = 1182.5 Watts of solar panels

You will either need

1 unit of 1182.5 Watts solar panels, or
5 unit of 250 Watts solar panels, or
8 units of 150 Watts solar panels, e.t.c.

This amount of panels are only good to recharge your batteries, if you want to run loads simultaneouly,
double the panels.

If you discharge batteries below 50%, all my calculations will be off.I did not account for lower discharge.

I did not account for more loads; only exactly what you listed.

Cheers.
Computers › Re: Inverter Users : Lets Have Your Experience by makavele: 8:52pm On Apr 17, 2018
tziz:
Maybe u are using a Watt meter, mine is wat is written on the rear dat I know.
Professional installers will always do a proper (emphasis on proper) load audit

and this takes into account using a watt meter . . . and discarding what is stamped on the energy labels

as it has been proven often times, appliances meant for this region (sub standards) do not conform to the labels most times.

since we have a lax quality control system
Computers › Re: Inverter Users : Lets Have Your Experience by makavele: 8:51pm On Apr 17, 2018
tziz:
Bro, iv please do the calculation for these loads:

These are wat i want to be running during the day alongside charging the batteries with the solar:
42" LED Tv: 110W
GoTv decoder: 15W i guess.
Ceiling Fan: 70W

Thanks
Done

Uploading here soon
Computers › Re: Inverter Users : Lets Have Your Experience by makavele: 5:12pm On Apr 17, 2018
tziz:
Oh, I just checked the Home Theater again, it's even 150W not 115W. @bolded, really? Iv seen many. Mine is the type with tall standing speakers. It's 1000Watts P.M.P.O. I'll check and confirm the others after work today and let u knw.. Tnx
Mine is a 2,000 watts system, 4 surround speakers, 1 twitter and 1 bass engine ..

Yet I have never seen it go above 45 W, even at maximum volume
Computers › Re: Inverter Users : Lets Have Your Experience by makavele: 10:48am On Apr 17, 2018
kiekie1:
What a bad experience ! There are so many reasons why battery die prematurely but its so sad to hear batteries turning scrap in less than a month , it shows that a proper load audit wasn't done , substandard material or undersized battery -solar system ! Cheer's
Exactly what I told him
and they blamed the “poor inverter” that did
nothing wrong
Computers › Re: Inverter Users : Lets Have Your Experience by makavele: 1:33am On Apr 17, 2018
I'll give you breakdown in the morning
Computers › Re: Inverter Users : Lets Have Your Experience by makavele: 1:33am On Apr 17, 2018
tziz:
42" LED TV = 110W maximum wattage (as written on the rear, without energy saving program).

32" LED TV = 70W (as written on rear).

GoTv decoder.

2 Cieling fans

Two energy saving bulbs.

Playstation 4 Slim system = 80W

Home Theater system = 115W (hardly use).

I'll luv a solar system dat can power the 42" TV, Gotv decoder, 1 cieling fan during the week days and still charge the batteries for peeps at home while I'm at work. Having enough juice for me to relax and play my game after work for at least 3 hrs
What is the wattage of the decoder = 15W i presume?

The bulbs how many watts too = 15? 10? 25?

ceiling fans should be 80 watts

I am yet to see a home-use theater system for 115W.. . should be no more than 30W max
Computers › Re: Inverter Users : Lets Have Your Experience by makavele: 12:54am On Apr 17, 2018
tziz:
I know Felicity Solar, they installed the solar system we use in my office, a 5kVa system with 10pcs 200Ah batteries, all the batteries died within 10months.
Well, I'll consider adding a stabilizer, thanks for that. Looking at Solar too. If I giv u a typical daily load, can u giv an estimate of how many panels will be sufficient? For charging only, then charging and simultaneously using it for load
I can give 1001 reasons why a battery can die . . . that is not tied to any specific inverter model
ranging from poor load audit, faulty installation, bad battery make etc

Provide typical daily load.
Satellite TV Technology › Re: Solar Energy, A Complement To FTA by makavele: 12:45am On Apr 17, 2018
DMerciful:
200A? Na printing press? Most inverter users... What's their average load?
Funny you...

Somebody with 20 units of 200Ah 12V batteries . . . (where between 10 -20) is the norm for energy autonomy

How safe to run as 12V parallel huh?
Computers › Re: Inverter Users : Lets Have Your Experience by makavele: 12:37am On Apr 17, 2018
tziz:
Bro, u still dnt get me. What inverter do u use and do u use gen to charge it? If yes, what's the capacity of ur gen?
I dnt hav any issue with the charging current of my Inverter. Plus it doesn't take dt much time to charge it up to full with Nepa wen it's fully discharged(which I hardly do), trust me, I keep serious tabs. My Inverter takes 14hrs+- 25mins to charge my batteries to full wen it's fully depleted. This is not even what I'm talking about, lemme giv u a layman's explanation of wat I'm saying:

I charge fully depleted battery with Nepa for 5hrs = 7hrs usage time till it fully depletes.

Then, I charge fully depleted battery with gen for 5hrs = 3hrs usage time till it fully depletes.

Plus iv never seen a well known, good 12v inverter with upto 50 - 70 Amps charging current. You can show me one, I'd luv to knw. PS: good brands like Sukam, Microtek, Luminous etc
Not all those Samuel L. Jackson inverters o, dat don't have a charging program, as long as der's power, dey'll continue charging ur batteries till dey become pregnant. Lol
I also have a microtek 2000 watts 24V model . . and yes I charge with a generator (4kva gasoline generator) and no depreciation whatsoever.
If it is exactly as you have described,you might want to add a 2kva (at least) stabilizer between generator and inverter to sanitize the input.
Your generator is not producing clean power.
There are many inverters just that' you've been looking at the wrong (cheap) places
Magnasine has a 12V version that offers 70 amps (close to 500k) ..and so does Felicity (upwards of 150k)
Just that they don't come cheap

Sukam, Microtek, Luminous are tier-3 (budget) inverters
Computers › Re: Inverter Users : Lets Have Your Experience by makavele: 10:17pm On Apr 16, 2018
tziz:
If u read my writeup well, u'll find out dat I never have issues with my Inverter charging the batteries through Nepa, my issue is charging with gen. I'm not the only one dat has complained, well except for pple using bigger diesel gens. I use a 1.1Kva, 12v Microtek Inverter with two 200Ah AGM batteries in parallel, the inverter itself outputs 15-20Amps of charging current, it's very good wen on Nepa. I also use a 2.9Kva petrol gen to charge it n dats wer my issue Coms in, it seems slower wen charging with gen (gen is very sound and never been worked on), hence, I'm thinking of employing an extra smart charger to help boost up the charging speed while using gen, u get now?
Let me break it down for you now:

Inverter is 1.1 kva (apparent power); so real power (minus inefficiencies (considering power factor)) would be 1100 VA * 80%= 880 Watts

You said charge current 10 - 20 AMps.. Let me use 20 amps x 14.6 v (average voltage)= 292 wATTs at any given hour or less (if i use nominal voltage of 12.7)

Batteries: 200Ah X 2 X 12 = 4800Wh

Charging time:

1. Assuming battery is depleted to zero: 4800/292= 16 to get to roughly 80%; when you factor in absorption time and take note that the charge pattern isn't a linear graph since current will keep reducing over time . . so add extra 3 hours= 19 hours plus
So it would take about 19 hours to get thoroughly full if you allow batteries deplete that inverter turns off itself

2. Assuming battery is depleted to 50%: 4800/2/292= 8 hours.. add extra absorption time= 11 hours or so.

The point is that the inverter is not capable of charging those batteries sufficiently . . While on NEPA you might leave it overnight and experience good charge..But do you keep your gen turned on for 20 hours at a stretch to charge your battery . . .
I doubt so...If you do,then battery would be as good as when charged via NEPA

I repeat, You would be better off using an inverter with good charging capabilities e.g. one that offers 50 - 70 Amps on 12V

20Amps isn't even ideal for a 24V inverter but can be managed.
Computers › Re: Inverter Users : Lets Have Your Experience by makavele: 6:19pm On Apr 16, 2018
tziz:
OK noted.

My Inverter has very good charging capability by the way. I'm thinking to add solar though.
So why external charger in the first place ...

unless, probably, the inverter has a weak amp output . .
Computers › Re: Inverter Users : Lets Have Your Experience by makavele: 6:18pm On Apr 16, 2018
tziz:
Are u saying the extra energy yield isn't worth the extra buck for mono?

Thanks for the response anyways.
Yes I said so . . especially when you get them from a tier-2 manufacturer . . .

You'll be looking for the difference;and you'd find none
Satellite TV Technology › Re: Solar Energy, A Complement To FTA by makavele: 1:43pm On Apr 16, 2018
DMerciful:
Battery going out of sync is the biggest challenge to series batteries. I am changing the configuration of a client system to 12v bcoz of this. For me the max system voltage should be 24v..best is 12v.
Then how would you handle current in excess of 200 Amps; for a super large battery bank huh
You want to get cremated before your time, brov ?
Satellite TV Technology › Re: Solar Energy, A Complement To FTA by makavele: 1:38pm On Apr 16, 2018
GeorgeD1:
barezzi,
this is getting quite interesting, isn't it? if 300ah for lead-acid equals 100ah for lithium it then
means we have to ultimately change the way we calculate our power fundamentals, i.e p=iv.
unfortunately i'm yet to see any documentation in support of this. i'd be happy if you could give
any references. at least that would be a good starting point.
Let me chip in from behind the curtains..

I guess he mean't to say 100ah lithium is equivalent to 200ah lead-acid . .
Because while you can only take LA batts as far as 50% to stay in shape; you can take Li batts down to 0%.
But what he failed to understand is that it is cheaper . . buying 300ah LA batts vs 100ah Li batts . .
For now,the expensive price and little practical facts does not do justice to dumping the traditional lead batts.
The "exaggerated" 50,000 to 100,000 cycles for now is merely hypothesis arrived at with extrapolated data
The true test would be using them for 10 years and see how the hold up . .practically I mean
Computers › Re: Inverter Users : Lets Have Your Experience by makavele: 1:05pm On Apr 16, 2018
tziz:
Ok so im thinking, since its undastood that NEPA mains charge inverter batteries better than Generators (for reasons actually unknown), what then is the solution to this? Why should i be getting more juice out of my battery bank wen i charge with mains for about 3hrs than wen i charge with generator for 5hrs? The plan is to save, right? I dont want to burn money on fuel just to get lil juice in the battery at the end.
Will adding an external Smart Charger to the inverter wenever im using Generator help?
The use of external chargers is highly discouraged; except you can't help it.

Get an inverter with good charging capabilities or add a solar array
Computers › Re: Inverter Users : Lets Have Your Experience by makavele: 1:00pm On Apr 16, 2018
tziz:
Plus, between Monocrystalline and Polycrystalline Solar panels, which is best? The reasons too pls..
Can i hook up solar panels to my existing inverter system and how? NOTE: Inverter is not a hybrid, i only charge through mains.
Pound for pound, mono gives more energy yield . .but the price difference between them vs energy gained
isn't so much for a good bargain

Yes, you can hook up solar panels. You will need to do a comprehensive load audit to know the amount of panel power required
et al.

Seek professional help
Computers › Re: Inverter Users : Lets Have Your Experience by makavele: 12:59pm On Apr 16, 2018
Deluxe8000:
Please Pls how can i boost a year old new 200ah battery to life again
Get a new one to avoid stories that touch
Computers › Re: Inverter Users : Lets Have Your Experience by makavele: 12:55pm On Apr 16, 2018
iziah:
Please I need your help, I bought a 2200watts inverter and a smart charger, when it was time to buy the batteries, based on my budget I could either go for 2 deep cycle 100ah each or 2 calcium batteries 150ah each. I called my installer and he said there is no harm using the calcium batteries. Now after installation, the charger during charging charges up to 25.4v then it stops at that point the percentage is about 64% to 67%, it doesn't go higher than this. Also when I switch to inverter the percentage increases to 100% and remains like that until the inverter start beeping, the voltage drops from 25.4 to 24.4 and then starts running down quickly and my appliances goes off at about 21.1v


I only put on 3 power saving bulbs, 1fan, charge 2 phones, 1 laptop and my 55inch LED TV at a time.

The installer checked it and said the problem is with the connection, that one socket which powers my fridge was still connected to the inverter and he rectified it but I am still having this problem of charging my batteries for more than 5 hours only to have it low afer about 30mins.

Please tell me what I need to do. Thanks.
1. You should have gone for regular deep cycle batteries. ..
2. You should have gotten an inverter that has an inbuilt charger since the smart charger is not so smart anyways
3. 25.4V is about 12.7V per battery . . which is just about 100% for a full battery but herein lies the trick . . the battery is not yet full
A competent charger has to raise your battery voltage to about 14.4 - 14.8 per battery . . i.e about 28.8 - 29.6 V in your case
and stay there for at least 2 hours; before bringing it down to 13.4 - 13.8 i.e. 26.8 - 27.6 in your case.
This will indicate thorough 100% charge.
Since the smart charger isn't doing so . . your batteries are heavily sulfating and dying with with each passing day.
4. Lead acid batts shouldn't be discharged past 50% (30% dod (depth of discharge) is better)
You have been taking your battery to 10.5V instead of maximum 12.0V (50%) . . you have been flatlining those batteries to 0%
They are dead already . .


Bottom line: You will need a new inverter with charging capabilities and new batteries else; "SORRY NA YOUR NAME"
Satellite TV Technology › Re: Solar Energy, A Complement To FTA by makavele: 8:55am On Apr 12, 2018
NiyiOmoIyunade:
Yes it is.

Provided you can afford the initial entry cost or you have access to financing on favorable terms.

There is also that small matter of how many known deep cycle/RE users have gone past the 8-15 year mark because the technology is still relatively young vs lead acid grin

A lot of the cycle life representations were done under lab test conditions vs. real life.

Temperature and parasitic reactions which reduce capacity with each charge and discharge cycle are also possible issues - for me it is still fingers crossed till I see more live experience from end users - I cannot afford a NGN5Milion plus gamble for the Lithium battery capacity I need.
Buhahaha; then I guess you'll have to ask Dapsyra again how the batteries fared after 41 yrs . . . 2059
Hopefully the world go never end by then.
Phones › Re: Subscriber Options for UNLIMITED Internet - WORTH IT? by makavele: 6:13pm On Apr 10, 2018
.

Autos › Re: I Want To Ask Question About Bajaj Motorcycle by makavele: 2:14am On Apr 09, 2018
RUN AS FAST AS YOUR LEGS CAN CARRY YOU !!!!
Autos › Re: 2007 LEXUS Rx350 full option For Sale In Ajah car is Just Too Clean Call DHERMY by makavele: 5:34pm On Apr 08, 2018
omachee:
Any issues? I know normally everyone will answer no issues, but if there are make it known let me factor in cost of repair before knowing if it's a good deal.
Words of wisdom !!!
Satellite TV Technology › Re: Solar Energy, A Complement To FTA by makavele: 4:11pm On Apr 08, 2018
^^ You need to pay attention to what he said; you're saying the same thing; mate !

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