Battery charging, from another thread

[Bala]

Thanks Russ, Sunking often does not actually answer the questions asked but that makes me surf and study to try and work out if I am asking things wrongly or if he has not really read the post. at the end of the day i possibly learn more in the long run. Its just that the dog has got sick of me talking to him about electricity

Thanks mike for the hydro formula,

I was trying to get a formula for sizing a battery charger to a battery bank based on the ah capacity of the batteries, but I now dont think that there is one calculation based on battery capacity

I now believe ( maybe wrong ) that it is not only the ah capacity of the battery bank that is a factor but also what DOD the batteries will be in and the time required/avail to recharge.

[Mike90250]

I was trying to get a formula for sizing a battery charger to a battery bank based on the ah capacity of the batteries, but I now dont think that there is one calculation based on battery capacity

Generally, 10% of the battery capacity, is a good starting point for PV charging, as that's whats needed to bubble the electrolyte to stir it.

[Bala]

Hey Mike,

it was you posting that in a couple of other threads that has lead me on this quest and its funny that has gone full circle, but as i say I learn a lot in a round about way.

Its often hard online to get across what i am really trying to understand hence it can be hard to answer my questions, but thats all part of it.
Im happy that I know a more than i did a few days ago

[Mike90250]

micro hydro is VERY different than solar. MH runs 24/7, and only needs to be slightly larger than your loads, and your batteries have little work presented to them. Solar PV, you have to cram all your charging into 4 or 5 hours, and the evening and morning loads really pull the battery while there is no charging.

[russ]

In micro hydro the batteries are really more of a buffer than storage?

[MarineLiner]

In micro hydro the batteries are really more of a buffer than storage?