More Amps = Faster charging?

[Sunking]

@Sunking: Ok, i thought the AH rating was just how long it can sustain the rated current for. So it works the same for charging the battery?

Yes minus efficiency. For charging it is A x H x 1.2

[Zillard]

@Sunking: Ok, i thought the AH rating was just how long it can sustain the rated current for. So it works the same for charging the battery? Need so many amps for so many hours to charge it.

@Mike: Not sure about your statement. Should i not exceed the rated amps by more than 10% of charging i.e if rated at 1A i shouldn't charge it with 1.1A?

OR, i can charge at as much amps as i can until i get to 90% of full capacity, then throttle down to normal amp rating?

I can see where a decent MPPT controller will be helpful in such a case.

[Mike90250]

At some point, the limits of the battery will apply, generally, it's around 10% of capacity, that you don't want to exceed, when charging. Otherwise, you overheat the battery and damage it. Even if it's only 0.5% each damage cycle, in a year (360 cycles) , that can add up. And that varys, when the battery is discharged , it's a little safer to charge it faster, but as it approaches 80%, you have to throttle back.

[Sunking]

Yes that is correct, but there are limits as to how fast you can charge a battery.

From the formula you can see it in action. H = AH/A, A = AH/H, AH = A x H

[Zillard]

Hi guys

I found a few threads about panels in series and parallel, and i started wondering about my question below. But the threads were form 2009, so didnt want to post on a dead thread, but I need confirmation on something that is bothering me, so please assist if you can.

Let say i have a panel/controller setup capable of charging a battery at for example 18V and 1A, and complete the charge cycle in 6 hours. If i put additional panels in parallel to up my current, and my new panel/controller configuration can charge at 18V and 6A, will my charge cycle complete in 1 hour instead of 6? Im sure if so, it wont be such a direct correlation, but just saying it for example. In essence, more Amps decreases charge time.

Am i correct with my above statement?

I have more questions, but will only ask them if i am correct in my assumptions.

Looking forward to your responses.

Thanks