₦airaland Forum

ask4bk:
Pls what's the best way to connect 2 solar panels of different wattage to get the most wattage out of both?

Series or parallel?

Parallel Wiring: If the panels have similar voltages, connect them in parallel. This method adds the currents while maintaining the voltage, maximizing the total power output.

Series Wiring: If the panels have different voltages, connecting them in series can increase the total voltage. However, this method is less efficient for mixed-wattage panels as it uses the lowest current, potentially reducing overall power output

HeavenlyBang:
I wouldn't even touch that deal at anything above like 300k.

Unless he does a capacity test proving they still deliver at least 85-90% rated capacity, in which case I fit make am 400k

Battery may have been used for 7 years. Lol

ask4bk:
Pls what's the best way to connect 2 solar panels of different wattage to get the most wattage out of both?

Series or parallel?

Same Voltage or less than 5% difference = parallel

Same Current or less than 5% difference = Series.

Jinko 440w and 555w works perfectly in Series..

I have shared this on my older username before.

HeavenlyBang:
I wouldn't even touch that deal at anything above like 300k.

Unless he does a capacity test proving they still deliver at least 85-90% rated capacity, in which case I fit make am 400k

You don leave us for cartalk, wetin dey happen na

So here is the thing
I have addo and sunfit battery both 220ah
Tho I just added the sunfit battery to the addo but I noticed the life span is not different from when I was using the single addo battery I’m now thinking is it the inverter cause the inverter is 900kva addo

HeavenlyBang:
Assuming you're using basic 10W chargers, that's between 1000w and 1500w.

To go off grid, you'd need a

3kw inverter
-3000w of panels
-5kwh lithium battery assuming you run till around 9/10pm.

2-2.5m project.

I really appreciate this. Please can I have your number

ksmart027:
You don leave us for cartalk, wetin dey happen na

I still dey, boss. There's just not much going on in Cartalk anymore unfortunately, but I try to check in regularly and contribute when I can.

mctfopt:
Battery may have been used for 7 years. Lol

Exactly. Likely very abused.

andymola:
I really appreciate this. Please can I have your number

I'm not an installer, sir.

HeavenlyBang:
I still dey, boss. There's just not much going on in Cartalk anymore unfortunately, but I try to check in regularly and contribute when I can.

Like once in 2 years ?

jceesquare:
Like once in 2 years ?

Cartalk is almost dead because cars are so expensive now. Economy don hold men for neck

Dam5reey1:
Same Voltage or less than 5% difference = parallel

Same Current or less than 5% difference = Series.

Jinko 440w and 555w works perfectly in Series..

I have shared this on my older username before.

Thanks.. They are actually both jinko 555w but but have shattered glass. One is producing 250w, don't know about the other yet. Both being shattered at different degrees I only thought they will now have different volts and current production. I want to join both together for a setup. I can still use them for some years.

5kwh 51.2v felicity lithium batteries available
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HeavenlyBang:
Cartalk is almost dead because cars are so expensive now. Economy don hold men for neck

True sa

ask4bk:
Thanks.. They are actually both jinko 555w but but have shattered glass. One is producing 250w, don't know about the other yet. Both being shattered at different degrees I only thought they will now have different volts and current production. I want to join both together for a setup. I can still use them for some years.

Guys be very careful with all this shattered glass solar panels. They discard them for a reason. Some people may have been using them for years here, well, I don't joke with myself and properties.

The money saved in buying them is not worth the risk.

HeavenlyBang:
I wouldn't even touch that deal at anything above like 300k.

Unless he does a capacity test proving they still deliver at least 85-90% rated capacity, in which case I fit make am 400k

I have said it here over times, you don't sell a used battery!!! Except you know for certain the state of health of the battery. I may part with 100k for one.

400k!! You be father Christmas now.

HeavenlyBang:
I still dey, boss. There's just not much going on in Cartalk anymore unfortunately, but I try to check in regularly and contribute when I can.

Na true sha. Much respect boss.

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Oshomo12:
Guys be very careful with all this shattered glass solar panels. They discard them for a reason. Some people may have been using them for years here, well, I don't joke with myself and properties.

The money saved in buying them is not worth the risk.

I appreciate the advice sir.
But I didn't buy them shattered. I bought them brand new, and while transporting to far location on bad road with ups and down, 2 panels shattered out of 10. I used the 8 clean one. The other 2 are still producing power. I don't want to waste them when I've extra inverter, extra controller I can throw the two shattered ones into to help me get the value of the money I spent on them. Can't throw 260k away like that. They can serve me for 5-8 yrs if I'm lucky.

Good morning, everyone. Please, I need some advice or information concerning an issue.

I have a 2.5kva inverter system that was installed November, 2024. All was well until Feb/March 2025. My inverter now trips off once the sun goes down after about like 5-6 hours of use.

When I charge it with nepa, it reaches 14.6, one time I noticed it even reached 14.7. But once I unplug it from the charge, it drops to 12.6 and then drops further to 12.4 before further depleting until 10.something.

Please, what do I do? I'm so exhausted

Amyah:
Good morning, everyone. Please, I need some advice or information concerning an issue.

I have a 2.5kva inverter system that was installed November, 2024. All was well until Feb/March 2025. My inverter now trips off once the sun goes down after about like 5-6 hours of use.

When I charge it with nepa, it reaches 14.6, one time I noticed it even reached 14.7. But once I unplug it from the charge, it drops to 12.6 and then drops further to 12.4 before further depleting until 10.something.

Please, what do I do? I'm so exhausted

What battery type are you using?

ask4bk:
I appreciate the advice sir.
But I didn't buy them shattered. I bought them brand new, and while transporting to far location on bad road with ups and down, 2 panels shattered out of 10. I used the 8 clean one. The other 2 are still producing power. I don't want to waste them when I've extra inverter, extra controller I can throw the two shattered ones into to help me get the value of the money I spent on them. Can't throw 260k away like that. They can serve me for 5-8 yrs if I'm lucky.

You even have time replying.
The only thing we see here if fire fire fire; risk risk risk. But we all:

put our phones in our pocket with built in lithium ion that most run away from.

Sit on fuel tank in our cars

Plug in sockets with 220v even beside a new born baby.

See bike men sit close to their fuel tanks.

see ceiling fans running over our heads.


But when we see solar and lithium ( ion or phosphate) we start running here and there screaming risk and fire because of selected few that abused their system.

This thread is not for validation or personal opinion of selected few. Make your research, test, and go for what works for you and you.

OGA, USE YOUR PANELS..

Amyah:
Good morning, everyone. Please, I need some advice or information concerning an issue.

I have a 2.5kva inverter system that was installed November, 2024. All was well until Feb/March 2025. My inverter now trips off once the sun goes down after about like 5-6 hours of use.

When I charge it with nepa, it reaches 14.6, one time I noticed it even reached 14.7. But once I unplug it from the charge, it drops to 12.6 and then drops further to 12.4 before further depleting until 10.something.

Please, what do I do? I'm so exhausted

I see battery death.
Typical way a lead acid behaves when going bad.

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Amyah:
Good morning, everyone. Please, I need some advice or information concerning an issue.

I have a 2.5kva inverter system that was installed November, 2024. All was well until Feb/March 2025. My inverter now trips off once the sun goes down after about like 5-6 hours of use.

When I charge it with nepa, it reaches 14.6, one time I noticed it even reached 14.7. But once I unplug it from the charge, it drops to 12.6 and then drops further to 12.4 before further depleting until 10.something.

Please, what do I do? I'm so exhausted

Kind of experiencing same thing as you’re tho mine will charge to 13. Something and drop to 12.6 then
But since mine is 900kva with two batteries
I want to upgrade the inverter to 2.5kva before I start troubleshooting plus also the inverter charges the battery slowly

EVs are the future.

New 1MW flash charging unveiled today. 1000v, 1000A.

Amyah:
Good morning, everyone. Please, I need some advice or information concerning an issue.

I have a 2.5kva inverter system that was installed November, 2024. All was well until Feb/March 2025. My inverter now trips off once the sun goes down after about like 5-6 hours of use.

When I charge it with nepa, it reaches 14.6, one time I noticed it even reached 14.7. But once I unplug it from the charge, it drops to 12.6 and then drops further to 12.4 before further depleting until 10.something.

Please, what do I do? I'm so exhausted

Let me guess, tubular battery?

isangjohnson:
In my own opinion, I suggest we stick to what works for us as individual. We can never roll out the aspect of trust in business and other indices. Mr A might sell grade B cell at 50k while Mr B might cell the same quality of cell at 80k. Someone might prefer to still buy from Mr B at a higher price because of trust and customer support services.
With my limited time, I will still advice that whoever wants to buy grade A cell should first of all collect the manufacturer test report and forward it to Ev Company for verification before making payment. The Company email address is everywhere and the response is given within 48 hrs.

Good day isiang, I want to make a purchase of >100kg from Alibaba, please what shipping agent do you usually use yourself that is reliable and affordable, and what's the average time it takes your goods to arrive

Olamlag:
Good day everyone, I a trying to do a small solar set up, of 1kva 12v inverter with 100ah lithium battery with 2pcs of 400w trina solar panel.
So far here is what my research has givinge
Cworth 100ah 12v battery 300k
Panel 70k each
Inverter tasha energies 1kva 180k
I will like to know of this product are good or if there are better ones or better pricing I could go for? Thanks

I can see from this thread that cworth should be cheaper than that, still don't know where to get it at the cheaper price? I should mention that I am not located in lagos I am in Osun State

Thanks

Dm me I will give you good price for this, and the best

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Anyone0455:
Kind of experiencing same thing as you’re tho mine will charge to 13. Something and drop to 12.6 then
But since mine is 900kva with two batteries
I want to upgrade the inverter to 2.5kva before I start troubleshooting plus also the inverter charges the battery slowly

First off, what you have is 0.9kva or 900va inverter, not 900kva like you stated.

Secondly, if your inverter batteries are draining that fast already, getting an inverter as large as 2.5kva will make it worse as the inverter will consume significant energy to power itself - it could be as much as 40w

Finally, your batteries may not be bad per se. You may just have an under-charging problem. Inverters with charging function do not charge batteries optimally.

Most times, they undercharge your batteries. Your lead acid batteries should bulk charge to 14.4-14.6v (full charge), then float down to 13.6v if left idle. But most inverters will charge to 13.5v, then stop charging and indicate as battery full when the battery isnt. The result is this sharp drop in voltage you currently experience and you wont get good backup time from the batteries. And if this situation continues, the batteries will begin to experience sulphation on the plates, leading to more damage.

What you need is an external charge to continue charging the batteries after the inverter stops its own charging. Also use a multimeter to get the voltage readings of your batteries while at it.

Meanwhile, where is your location? How many batteries do you have? And in what way are they connected - 12v or 24v?