₦airaland Forum

efuro:
I understand my brother, I fill ur pain. ur are in a river but ur thirsty. using pwm is usually not satisfying even though they do their bit.
pls borrow money & buy mppt. even with my worthless 450w panels I get a minimum of 56AH per day ur 2kw with mppt will be rainstorm.

Biko! Pele!

I envy you ooo!

earthrealm:
that installer should be shot at sunset, and shot again @ sunrise if he is still alive
utter rubbish,
go for mppt, is your setup 24v or 48v?, if 48v 60amp mppt wud b good, if 24, you need 80amps mppt

batteries last per load connected to it, convert the juice in ur battery to watts, and divide by the wattage of ur load, multiply by 80% to factor in losses/efficiency, or first multiply the baat wattage by 50% to get 50% dod

@ all, the attached picture, who knows where i can buy it, and the nigerian name for it?

NaijaWindSolar:
What's the size of the load that you are running? Because that will help to properly diagnose your situation. Without use, you should get about 75% battery charge daily. If your consumption exceeds production, then there will be nothing left to go into your batteries.

Remember that the worst months for solar harvest are from April to September. So knowing your load size is really important?

Also is your charge controller MPPT?

DMerciful:
Its not well installed else it will last the whole night. Be specific on what 30% load means. How many wattage of load? Or what's the capacity rating of ur inverter? On sunny days what's the average charging current at noon day you've observed? These questions will help De know what's wrong with ur system.

iLoveTheSun:
@Dreamflyin

Good day,
can you please upload some pics of your installation, cabling and the name/type plate of the battery and the solar charger.
I guess, it is c100 = 150 Ah. For charging purpose you should take c5 Ah values into consideration, the Ah is much lower, so the maximum current for charging should be smaller as well. About 10% of Ah figure, i.e. 120 Ah means max. 12 Amps.

I am afraid, there was a problem, in order to improve the performance you connected your 3kVA inverter to the AGM batteries, and caused another problem or you increased the existing damage of "bad" batteries. (I hope you do have a warranty?!)
Because AGM batteries need to be charged gently, i.e. with a smart battery charger. That smart battery charger should be able to run different charging methods for Gel/AGM and flooded lead-acid.

AGM is low/free maintenance, but at the same time you cannot "repair" the battery yourself.
I'd go for flooded batteries with valves that you can open. There are transparent batteries in the market, so that you can see the thickness of the lead plates, and you can see the gasing inside the battery. The advantage: you can look at all the batteries and you may be able to discover any differences between them. - no rocket science.

Sorry, if I do not have any good news for you regarding the state of your batteries!

sunny regards,

earthrealm:
my first guess would be that they installed used batteries instead of new.
2nd guess would be that the system isnt connected correctly.wrong solar panels config or CC config etc
lasting 2hrs on 30% load?...something doesnt appear quite right here, too lazy to crunch the numbers to find out

earthrealm:
my first guess would be that they installed used batteries instead of new.
2nd guess would be that the system isnt connected correctly.wrong solar panels config or CC config etc
lasting 2hrs on 30% load?...something doesnt appear quite right here, too lazy to crunch the numbers to find out