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Satellite TV Technology / Re: Solar Energy, A Complement To FTA by bigrovar(m): 4:27pm On Jul 03
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2 Likes

Satellite TV Technology / Re: Solar Energy, A Complement To FTA by bigrovar(m): 4:14pm On Jul 03
dejidotun2000:
Any conductor that enters your inverter from outdoors makes your inverter fair game for lightning electromagnetic pulse including the cables that connect your solar PV array to the charge controller or hybrid inverter as the case may be unless you have a LPS installed.The grid conductors will carry a higher risk though because they may extend for up to a kilometre to your distribution transformer.

Very true this is why the solution is not to disconnect from the grid but to have layers of protection to your system from the design phase. Most people neglect protections system even though they are the cheaper aspect of any Installation. Yes few things can survive a direct lightning strike.. but most lightning related damage is from indirect strike.

It starts with having a good earth. Then having voltage protection systems. It also good to ground your panel frames or mounting systems to the same earth.
The last set of upgrades I did to my solar setup was protection related. They include grounding all the panels using bare copper wire and PV frame ground lugs I got from AliExpress.
Making a DIY combiner box with integrated current and voltage protection system.

This is to help reduce the risk of transient electrical surge causing damage.

5 Likes

Satellite TV Technology / Re: Solar Energy, A Complement To FTA by bigrovar(m): 3:51pm On Jul 03
IYGEAL:


Current/Voltage Limiter is certainly less than N20k.

I understand you use Gen to make up for bad weather, insufficient storage/pv; but some people don't want anything gen whatsoever. Gen can also come handy and save the day but I'd rather manage my loads on bad weather/grid days than use gen. Our situations may be different as I don't often have my batteries depleted to the point of needing the help of gen or grid. I left grid to run in my place because I often don't use and or need it.

The OP is having a really unfortunate situation with the grid in his hood but that's not the norm.

I support this view. Solar is best viewed from an econonic angle. If we have a perfect grid in Nigeria many wont be here because grid will always be cheaper than solar.

I currently live offgrid but before I consider spending millions extending my solar setup to make it more resiliant for low sunlight months.. It would be more economical to add the grid as an addtional source of electricity. The grid even though unstable would help to keep battery charged and reduce load on the system. Good thing is I have an inverter that allows me create a priority system which would allow me choose when the grid can come in. This would cost me 10% of the cost of addtional panels and batteries.
it is just the smarter way to get things done.

2 Likes

Satellite TV Technology / Re: Solar Energy, A Complement To FTA by bigrovar(m): 9:55am On Jun 22
drizzypat:
thank you so much


Pls how do I administer it to my batteries..I've got two batteries I wonna do that too

I just pour them in and charge?
The best way to top is when the battery is fully charged. Please avoid doing this when the battery is heavily discharged - this is due to the low gravity state of the battery essentially at that level what you have is pretty much just water, adding more at that stage is not good. It could allow corrosion of the internals of the battery. You want to add water when the battery is fully charged and thus gravity is high.
Satellite TV Technology / Re: Solar Energy, A Complement To FTA by bigrovar(m): 3:31am On Jun 22
House people. Please I need recommendation for water dispenser. If I can find one which uses inverter dc compressor I would be a very happy man. The current one I am using called Nexus is a total pain.
Satellite TV Technology / Re: Solar Energy, A Complement To FTA by bigrovar(m): 3:30am On Jun 22
drizzypat:
Hello I was told condensed water from an air-conditioner can me use as the liquid to be added in tabular battery then charge it ..it then becomes quite new

Pls is this true?

I would even say it is your best source of distilled water. Most distilled water sold in Nigeria (even in major malls and super markets) are adulterated. Try get from an AC with relatively clean hose and use a white cloth (I use a dedicated clean cotton signet for it) to filter it into a jar and you have your distilled water. It served me for over 3 years.

1 Like

Satellite TV Technology / Re: Solar Energy, A Complement To FTA by bigrovar(m): 3:27am On Jun 22
GeorgeD1:


two yrs ago (2020), one of my colleagues was lamenting bitterly how his average monthly phcn bill was close to 50k monthly.
he was forced to do some sharp practice in reducing the count rate of the meter and in the process unwittingly turned himself
into a milking cow to the nepa guy who did the job for him. when he saw that the amount he was being extorted was becoming
almost if not more than what he thought he was saving by altering the meter, he was forced to ask phcn to revert the meter
back to normal! grin
anyway, imagine paying 50k monthly for 5yrs (with the myto tarriff structure the rate keeps increasing year on year)
so, in 5yrs even if you live in an area where you enjoy steady power supply, you would have paid phcn an equivalent amount of
money which you could have used in setting up a complete, functional solar system.
and, it gets even crazier for the 'big man' with a diesel 'plant' in your analogy. with diesel prices hitting btw 900 and 1000 naira
per liter, a solar set up would cover the cost of running such a plant in less than a year!

This has been my calculation and why I am currently completely disconnected from the grid. The small 5kw system paired with 14.5kwh lifepo4 diy cells with smart energy management is giving me a better deal than hooking up to nepa and 45% of the system is from components that i have had in the last 3 years (which have all paid off their initial purchase price) in 3 years the upgrade I carried out in switching to lifepo4 and addtional PV would pay for itself. In this inflationary period, not having to worry about NEPA bill is once less thing to worry about.

6 Likes

Satellite TV Technology / Re: Solar Energy, A Complement To FTA by bigrovar(m): 4:13am On May 25
olopan:
Good day Guys,

putting together a solar calculator that can get your audit done in minutes, basically targeted at home users who are enthusiast or pro user

but i need to populate these list i have get going to get things up to speed. ...... everyone is free to add or correct existing data.

Appliances Wattage

LED Bulbs 3W - 3
LED Bulbs 5W -5
LED Bulbs 9W -9
LED Bulbs 18W -18
LED Pop Light 6W -6
LED Pop Light 18W -18
LED Pop Light 26W -26
Ox Fan 16" -120
Ox Fan 18" -140
Ox Fan 20" -180
Ceiling Fan - 80
Standing Fan -70
DC Fan -30
Rechargeable DC Fan -45
LED TV 32" -55
LED TV 42" -70
LED TV 50" -85
LED TV 70" -130
Laptop -70
CFL Bulbs 9W -9
CFL Bulbs 18W -18
CFL Bulbs 26W -26
Decoder -18
freezer -180
Fridge -120
Phone charging -12
Regular 1 HP AC -870
Regular 1.5 HP AC -1380
Regular 2 HP AC -2100
Inverter 1HP AC -480
Inverter 1.5HP AC -700
1 HP PUMP MACHINE -900
1.5HP PUMP MACH. -1400
LED Bulbs 10W - 10
Standing Chiller -200
Microwave -1200
Signage light - 90
Signage light Large -180


Thank you

Laptop 65w (when charging, 18w when fully charged)

1 Like

Satellite TV Technology / Re: Solar Energy, A Complement To FTA by bigrovar(m): 10:36am On May 20
ebocoms:
Good day,
I have been reading a lot about Felicity Lifepo4 battery capacity but I can state most of the statements are not totally true. The one i'm using is 5KWH (Model: LPBT24250 Usable Capacity 5KWH written on the box), I had consumed more 200AH from it more than twice before turning the inverter off myself. Although I set the capacity to 200AH on my BMV 702 initially because of the comments I read on this platform that their batteries capacity are not true capacity, but I have changed to 250AH after several capacity test. Reason my battery SOC is showing Zero in atatched pictures.

From my understanding, they have several models of batteries with same voltage at different prices but you need to do own research on the batteries.

I will advise the OP to check the inverter cut off time if it's set to like 50%.

PS:

I'm an end user and I have no relationship with Felicity.


Thanks for sharing your experience. The battery is rated for 200Ah. How much were you able to pull out of the battery from 100% fully charged? I did not really get that from your post.
Satellite TV Technology / Re: Solar Energy, A Complement To FTA by bigrovar(m): 11:38am On May 18
darediamond:
Does Natural Coal Get Formed In An Open Surface?
How come you expect to get quality man-made coal from burning wood in Air?

See, my directions are meant for individuals who are ready to GET THERE HANDS DIRTY LIKE I'M DOING MYSELF TO KEEP DISCOVERING SERIES OF WONDERS.

IF YOU DO NOT UNDERSTAND SOMETHING, YOU ASK QUESTIONS not that you become [b]unnecessarily arrogant [/b]at the person providing you with his or her own discovery.

Have you even tried what I explained on how to get the said effect at all?

Come on!!!

cheesy
Technology Market / Re: LG 1250W Home Theater System LHD687 For Give Away Price - Sold by bigrovar(m): 4:08pm On May 16
Sold
Technology Market / Re: LG 1250W Home Theater System LHD687 For Give Away Price - Sold by bigrovar(m): 5:31pm On May 15
More details on the specs https://www.lg.com/eastafrica/audio-video/lg-lhd687

Price on Konga is 220k

Technology Market / Re: LG 1250W Home Theater System LHD687 For Give Away Price - Sold by bigrovar(m): 8:06pm On May 12
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Technology Market / Re: LG 1250W Home Theater System LHD687 For Give Away Price - Sold by bigrovar(m): 2:39am On May 11
Enddy50ty:


Post full pictures and details

No other picture. You can. Google the speaker to see the review.
Technology Market / LG 1250W Home Theater System LHD687 For Give Away Price - Sold by bigrovar(m): 11:45am On May 10
I got this Home theater system as part of a promo from Fouani shop (LG Sole authorized dealer in Nigeria). The Home theater system is brand new. I opened the box to test that it is working and put it back. I got the speakers yesterday but I did need it since I already have samsung speaker and didn't need this one.

It is going for 120k.
The system is a 4.2 surround speaker with powerful dual subwoofer
The sound power is 1250w and produces earth shaking sounds and with heavy bass.
Convenient connectivity
Listen to the radio or play a DVD or CD connected through an Aux or HDMI cables and USB. With various connectivity options, setup your speaker to meet all your entertainment needs.

The market price for this speaker is 160-180k

The speaker has the 2 year warranty from LG.

Abuja

1 Share

Satellite TV Technology / Re: Solar Energy, A Complement To FTA by bigrovar(m): 4:56am On May 06
darediamond:

Sarcastic response will pave way and egg on ignorance alone.

Be ready to learn.

Answer my simple question: "what is RESONANCE?"

I am into Power Generation not mere application because without Electric Power, No Show.


No vex. Peace and love from my side.

6 Likes

Satellite TV Technology / Re: Solar Energy, A Complement To FTA by bigrovar(m): 10:02am On May 05
darediamond:

Yes, Lithium Ion do have Memory Issue. If you do not have practical experience of what that means, then read about it at least.

If I tell you all challenging me now that with Resonant Inverter, you can with 300W Monocrystal Panels power a Load of 1KW or more, you will all say it is a lie because of what majority of you have been wrongly taught in school.

The Back Emf you are all wrongfully taught in those govt controlled schools local or abroad can actually be used to power loads when it is collected at RESONANCE.

What is Resonance?

Can you answer?

Question makes Knowledge.




It is a good thing you were well thought in school. it is all clear to see.

2 Likes

Satellite TV Technology / Re: Solar Energy, A Complement To FTA by bigrovar(m): 10:00am On May 05
bigrovar:


The key thing to watch out for is the voc of your charge controller. That is the highest input voltage it can take from a pv. You need to ensure that whatever string you go for, the string voc must never come close to or exceed that of the cc.

145v doesn't give you much room, and for some of this Chinese controllers you don't want to go near their limits hence the reason for a 2 in series string and then parallel the 3 strings. I am putting this here so that those reading would understand the logic behind the 2S3P recommendation.

Just to add, one more reason for recommending a 2S3P configuration is to allow the controller to be more efficient and reduce loses when doing dc to dc conversation. Just ensure that you have the right wiring to ensure voltage loss is reduced.

The length between your controller and cc should also be factored in. If you have the panels installed on a roof 3 floors away, or about 10+ meters, then you might want to consider a 3s2p config. This means more voltage is send down the wire and you can spend less on wiring and ensure voltage loss is minimal.

2 Likes 1 Share

Satellite TV Technology / Re: Solar Energy, A Complement To FTA by bigrovar(m): 9:55am On May 05
ObabyObaby:
Good evening all, Pls what's the best way to configure my panels
6 pieces of 300w solar panel
Felicity charge controller 60a (voc 145v
Inverter24v 2500va

Valto
Niyi
Bigrovar
Olopan
Ojeysky

The key thing to watch out for is the voc of your charge controller. That is the highest input voltage it can take from a pv. You need to ensure that whatever string you go for, the string voc must never come close to or exceed that of the cc.

145v doesn't give you much room, and for some of this Chinese controllers you don't want to go near their limits hence the reason for a 2 in series string and then parallel the 3 strings. I am putting this here so that those reading would understand the logic behind the 2S3P recommendation.

5 Likes 1 Share

Satellite TV Technology / Re: Solar Energy, A Complement To FTA by bigrovar(m): 9:18pm On May 02
kola42:
Bosses, please can I connect 12v solar panel to this ?
I doubt that product is still in production, unless you are using an old used version. Yes it allows you to add a solar panels (comes built in with a pwm solar charge controller)

There is a review here https://upsinverterinfo.com/sukam-brainy-solar-inverter-price-with-panels.html

This was one of the devices that pulled me into solar. My initial plan was to setup one for use. I ended up not going with it but it was quite close.
Satellite TV Technology / Re: Solar Energy, A Complement To FTA by bigrovar(m): 9:08pm On May 02
darediamond:

I hate giving Fish.
I prefer making you a Fisher Man with a Difference!

Never buy any how inverter. Buy Modern PURE SINE WAVE INVERTER alone. Inverter painted in Blue and Black are most times Pure Sine Wave Inverter.

Never buy Amperage Hog inverter that uses low frequency transformer(60hz/50hz) for dc to ac conversion.

The Heart and Back Bone Of Solar Gen Set is the Solar Panel not Inverter nor The Controller of any type.

Buy only MPPT controller alone and if you can Not afford Lithium Titanate Oxide Battery, Go for Lithium Phosphate or Worse Lithium Polymer.

** NEVER YOU BUY Lithium Ion Battery nor SLA or sealed lead acid battery oo. ** Never!!
Always use Thick Gauge, Insulated Pure Copper wire for your battery charging and Battery discharging.

For your 800W load, if you intend to simultaneously charge your batteries and still have enough power to power your intended devices,

Get at least 10 pieces of 200Watt Solar Panels
Get one peace of 24Volt 200AmpHour Lithium Phosphate Battery Pack
Get 150Amp Variable Voltage MPPT Solar Controller
Get one 4 Kilowatts Non-Transformerlles Pure Sine Wave Inverter or better still one 4KILOWATT Pure Sine Wave Hybrid Inverter.

Bros I have one advise for you. Stop talking or offering advise on solar, battery or electricity generally.. especially offline. When you do things like this online it can easily be spotted and called out before it does damage. The worse case is when you spread this complete falsehood to family and friends many who might look up to you. Na god I take beg you. Don't take it out of the next. This came from a place of love.

13 Likes 2 Shares

Satellite TV Technology / Re: Solar Energy, A Complement To FTA by bigrovar(m): 2:01pm On Apr 19
truthbetold22:


Shut your stupid mouth. The lithium batteries I currently use, i imported myself from china. I am trying to be cultured wit u but u want me to go all out. Stupid Nigerians who think they have to make 50% profit on imported goods. Where did you import a cbm of battery goods for 500k? I import for a living. If you want proper contacts, you ask instead of spewing stupidity. How much is an entire container of batteries that a cbm is 500k?

Wether 24v or 48v, your batteries are ridiculously priced and u are no better than the alaba dealers that you curse here everyday. At 24v, that is still over 600k for a 24v 200ah bank without balancing and a proper bms. Because u have joined a group to import a few pieces of batteries now, you have suddenly become an expert on battery goods. You want to place all your life problems on this few pieces of batteries you want to sell.

Simple ask for contacts so i show u how it is done.

slowpoke!!

This is totally unnecessary and uncalled for. Please let us make this place civil. We leave in a free market country anyone is free to put price on their items and the market will decide. No one is a monopoly on lithium so I don't understand. Calling someone greedy because he did not sell at your price is just being entitled. Everyone should sell at a price they are comfortable it. No one is forced to buy. If you set at a high price and no one buys from you, no one will teach you to adjust.

This is free market, if you can offer batteries at a cheaper rate by all means and if you want to share information on how people can buy batteries cheaply by all means share and move on with you life. Market is about willing buyer willing seller.

5 Likes

Satellite TV Technology / Re: Solar Energy, A Complement To FTA by bigrovar(m): 1:50pm On Apr 17
NiyiOmoIyunade:
It looks good and checks nearly all the boxes with this clarification.

Panels connected to Earth rod!

All Earth rods connected together for equipotential bond!

The only place we differ is how and where to attach the earth cables to the panels - the literature says to attach to panel frame and mount rack frame, I do only the mount rack frame (properly installed the panel frame and rack frame should be mechanically and electrically same potential.



Thanks. I essentially followed your back channel advise on earthing. Including using Ground Enhancement Materials in place of the traditional charcoal and salt.
Satellite TV Technology / Re: Solar Energy, A Complement To FTA by bigrovar(m): 12:45pm On Apr 17
NiyiOmoIyunade:
My Oga GeekMaster Extraordinaire.

I have not forgotten the detailed tutorship and intro to Raspberry Pis you so kindly gave me back in the day - you rekindled the cold fires from my Linux admin days in my head.

Yours is a very elegant and simple dashboard - I love it.

I had some concerns about your panel earthing I wanted to discuss publicy for wider inputs and in case anyone wants to emulate.

1) Did you earth the panel frames themselves via the provided earthing point or did you earth the panel rack mounts?

It is preferable to earth the mounts instead of panels themselves for reasons below

2) Is the earth rod dedicated to the solar panels bonded to the rest of your facility earth? Electric code, personnel safety and field experience dictate an equipotential bond for all earth rods in a facility.

Now why do you not want to earth panels directly? Hybrid inverters that combine the DC-PV and AC buses sometimes throw random errors and faults because of the stray/leakage currents and ground loops between a seperately earth bonded panel and inverter protective earth - remember the inverters also have a N-PE bond (link neutral and earth inside the inverter) when disconnected from mains and inverting power from batteries - because these hybrids are also budget offerings and internals poorly isolated you will find stray currents jumping around and causing damage or random faults.

Some Solar CCs are positively grounded (rare to see such in Naija) those will likely suffer catastrophic damage if you ever use them with a negatively grounded panel.

With your system consisting of robust Victron CCs and Inverter, these issues are present but mitigated somewhat by the robust design and fault protection inbuilt and the fact that DC and AC buses are isolated but people who use hybrids and el cheapo asian CCs may want to be very careful if they choose to connect their panels to earth.

Overall, I have found that the most accomodating approach that works for all systems is to connect the panel mounting racks to earth and link all facility earth rods together for an equipotential bond - if there is an equipotential earth bond at the facility, the wire from panel rack to earth can be attached to one of the rods directly buried in the ground since this is already at thesame potential as the PE service to which the inverter is connected. With this scheme you get all the protection from static electricity and lightning hits and minimise the downside of equipment damage.

To clarify an already very confusing arena - an earth or earthing is when you connect the non current carrying parts of a system e.g chassis or frame or designated earthing point on a piece of equipment to an earth rod or other conductor buried in the earth while a ground is when you connect the current carrying parts of a system e.g neutral wire/bus to the earth.

Thanks for the compliment boss. I actually connected the eart lugs and by extension the cable to the PV frames not to the mount frame. All the writing said to connect to PV frame. I however have it connected to a bonded earth rod. I have 3 earth rods all bonded together within a 3sqm area. The PV earth cable terminated to an earth bus bar from one of the earth rod. I just made sure the cables were straight with little curve or right turns. The cable went from the roof straight to the ground terminal directly under the panels.

What is your take on this setup.
Satellite TV Technology / Re: Solar Energy, A Complement To FTA by bigrovar(m): 6:41am On Apr 17
Finally completed the upgrade to the solar setup. For context I started the solar journey with 2 tubular batteries and a 1.2kw 24v Sukam inverter tired to a 480w ground mounted solar system.

Over the past 6 years. The system was gradually scaled to what it is today. 5kw array, 5kw Inverter and 14kwh lifePo4 batteries.

The last set of work was to ground the panels. I got some panel ground lugs which were used with 16mm bare copper cable and terminated to a ground terminal.

I also configured a raspberry Pi for gathering system logs and usage for us for a new solar dashboard available here
http://energy.openculture.org.ng:8080/dashboard/view?id=46

What is left now are small finishing off work.

10 Likes 1 Share

Satellite TV Technology / Re: Solar Energy, A Complement To FTA by bigrovar(m): 6:32am On Apr 17
NiyiOmoIyunade:
You need a GX device or Raspberry Pi or other PC running Venus OS. So the CCGX, VenusGX, CerboGX will all work.

The charge limit done via DVCC from a GX device is specific to battery charging - the GX will keep instructing the CCs how much power to allow to pass per time - just enough power to service loads and keep the battery amps where you want them to be.

Whereas if you set a charge limit at the CC, that is a global amps limit - you are simply speccing the max amps that the CC will allow to pass through itself for both battery charging and loads



I do agree with this but then it has to be said implementing the above. An array that can resupply your batteries 50% dod in a day and using tech to smartly feed your battery with just what it needs. All these are not options for a cost sensitive system.

And over sized array is more money coupled with using it with gears from Victron ecosystem which are some of the most expensive around. The question to then ask is. If am going to be spending all that money on an off-grid setup. I won't use LA.

I am and have always been for linking economics with solar. If you are on a budget the focus area should be on your consumption. Limit energy consumption so that you can cycle your LA at about 35-40% dod that way you can have a reasonably sized panel that can effectively charge your LA battery. This would ensure you get the best from your battery and good ROI.

This was my secret for getting the most from my LA batteries. After 3 years the decommissioned Tubular battery can still their full capacity at C20 Discharge without going below 11.5v per battery. The average cycle was 40% dod and where always too charged every day.

2 Likes

Satellite TV Technology / Re: Solar Energy, A Complement To FTA by bigrovar(m): 3:47pm On Apr 16
NiyiOmoIyunade:
While Lithium remains the superior chemistry, let us not bash lead acid tech so much that we begin to put out incorrect info.

First off, all lead acid chemistries are not the same. As far as I know flooded batteries can safely accept charge at 13% of capacity so a 200Ah battery can take 26A easily with no trouble, AGMs can easily do up to 25% of capacity so your 200Ah AGM battery will take 50A no trouble.

If you are sized for typical 50% DoD then it should be possible to fill up your batteries in one solar day keeping within safe limits. Not to forget also that ideal sizing for offgrid lead acid battery is 3 to 5 days autonomy and if you are so sized, C rates stop being a problem.



I just need to add, while I do agree with all your said. It still needs to be emphasized that your over night usage is still limited by how much would allow you fully charge the battery. The lower you go the more difficult it would be to fill up the next day leaving your battery in a circle of partial state of discharge which is very bad for LA batteries.

2 Likes

Satellite TV Technology / Re: Solar Energy, A Complement To FTA by bigrovar(m): 4:58pm On Apr 15
As part of my system upgrade, I decided to use my Ipowerplus 5kva Inverter as a second charge controller and terminated the new array of 2kw to it. I would never have done this before now but I had to keep things within budget. The axpert MKS series of inverter which the Ipowerplus, Gennex and likes are based on has a known bug MPPT Bug which causes the inverter to switch to float early under certain conditions. The bug pretty much makes them completely unreliable and not fit for purpose because it has the potential to damage your batteries leaving it under charge.

In my research I noticed that the community around the axpert series released a custom firmware which fixes this bug and add more functionality to the inverter. One of the functionality is add is to make it more compatible with Lithium battteries. I flashed my inverter to these firmware and the result has been amazing. You can read more about this firmware and other important information about this type of inverter here https://forums.aeva.asn.au/viewtopic.php?f=64&t=4332

3 Likes 1 Share

Satellite TV Technology / Re: Solar Energy, A Complement To FTA by bigrovar(m): 4:52pm On Apr 15
NiyiOmoIyunade:
While Lithium remains the superior chemistry, let us not bash lead acid tech so much that we begin to put out incorrect info.

First off, all lead acid chemistries are not the same. As far as I know flooded batteries can safely accept charge at 13% of capacity so a 200Ah battery can take 26A easily with no trouble, AGMs can easily do up to 25% of capacity so your 200Ah AGM battery will take 50A no trouble.

If you are sized for typical 50% DoD then it should be possible to fill up your batteries in one solar day keeping within safe limits. Not to forget also that ideal sizing for offgrid lead acid battery is 3 to 5 days autonomy and if you are so sized, C rates stop being a problem.



Absolutely, if you note I was referring to Tubular which seem to the the fad these days. Yes AGM has higher rate of charge discharge compared to Flooded batteries like the Tubular type. In fact in certain situation I do recommend an AGM battery over Tubular for this very reason. The are the closest to Lithium in terms of charge / discharge rate and efficiency.
Satellite TV Technology / Re: Solar Energy, A Complement To FTA by bigrovar(m): 3:30am On Apr 15
Namzy:

Lol like I said it's just speculation because I doubt whether you've seen overcharging kill a tubular battery. You can check the health of tubular batteries using specific gravity which has been great so far. I'll definitely update come January 2023.
P.S my lowest SOC has been about 60% and according to my bmv battery monitor. My battery has been cycled once

True but gravity won't tell you the state of the lead and if they are being degraded. You will have high gravity from your hydrometer but that's just half the story.

1 Like

Satellite TV Technology / Re: Solar Energy, A Complement To FTA by bigrovar(m): 3:27am On Apr 15
Namzy:

Lol when I started my solar journey, I designed my system after yours. Although you've upgraded I'm still using my ipowerplus 24v 3kva and 2 tubular batteries. From my experience and forums I've checked this C20 charging has always been the rule but when I saw how much power I was wasting from my installed 2720w panels, I increased the charge controller amps to 100amps. Yes I decided to offer my batteries as an experiment as I've yet to see where overcharging killed tubular batteries. I have been using it like this for over 1 year and specific gravity is still good on all cells. Increasing the amps helped with using heavy loads like microwave and inverter ac as with the initial C20 limit, you can't run those loads while battery is charging. The only disadvantage for now is smell of the hydrogen and increased rate of topping up battery water of 2 months interval which is OK by me. If batteries die, then lithium it is. But for now I'm liking my tubular with increase charging amps

The high C rate charge won't kill the battery over night. Flooded batteries are quite resilient, however just know that most of the 100A you are pumping into the battery will be converted as heat. Lead Acid just can't process all of it as stored energy. Remember that batteries are essentially chemical energy. The composition of Lead Acid with electrolyte can only optimally process C20 anything about that is converted to heat and will gradually degrade the lead which will shorten the life of the battery.

I had a system I use in managing my 4 x 200AH Index tubular. The goal is to make my consumption generally very efficient such that my over night use is about 45% DoD. I then have an over sized panel set at 3000w. This ensures that as day breaks and the panels start charging.. slowly ramping up .. the amount of energy pumped to the battery from 3000w panel leaves bulk by 11am (due to relatively low battery depth of discharge) and by the time solar panels are at peak generation, battery is on absorption and CC is cutting back on the amount of currents going to the battery. This ensures that I maintain a safe charge limit for the battery.

This strategy however needs my night discharge to be low. It worked for me though for over 5 years.
Satellite TV Technology / Re: Solar Energy, A Complement To FTA by bigrovar(m): 7:43am On Apr 14
I currently leave completely offgrid no NEPA connection at all. My solar capacity is 3kw, battery is 200AH 48v. Even though my panel can provide me 50A and can theoretically charge my bank in 4 hours (say 5 hours) The tubular chemistry means that it would take 2 to 3 days to fully charge that battery.

Bulk charge at 40A would take close to 4 hours after which it would switch to absorption.. thus limiting the current going to the battery by as much as 10A. And it can do it his for 3 to 4 hours depending on discharge.. effective sunlight is done by 4PM.. remember this is an active system and I have loads connected to it.

Over night I will draw down the battery again from the partial state I left the night before.. starting from a low position.. again battery slow charge would mean I may never finish charging it again in day two cause battery can't take all I have to give.

I can not expand my panel to 5kw cause my battery would not be able to take most of it so it would be a waste. This slow charge for me is the biggest problem LA has. That and partial state of discharge problem.

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