Need batterys.
Had 12 volt duracells DC 24. Served me OK. lasted 6 years. They were january 2014 matched pairs.Cell went dead on neg side battery I Run 1100 watt inverter and do the coffee maker thing and toaster...
Forum Discussion
BFL13 wrote:prichardson wrote:
Sounds like you are worried about recharge time. Charge time is dependent on how much amperage has been removed from the battery bank. It does not matter if it is 2 12s in parallel or 2 6s in series. As far as the charger is concerned it is one big 12vdc battery.
You do faster time if you remove more! :) By doing 50-80s instead of 70-100s (both 30AH)
But then your bank is lower in AH (higher R) while camping so voltage drop is more. Try to still have enough AH at 50% to run the inverter loads and do 50-80s for fast charging too.
That can mean four 6s instead of just two. And a bigger amp charger and gen to run it to still keep the time down. And a bigger Rv to carry the four batteries. And a bigger truck to pull it.
Interesting concerning your comments above on battery "R" (internal resistance?)!
Can you provide a technical link talking about lead acid battery (6V or 12V) internal resistance changing much at all based on how far down they are discharged?
I've always thought that internal lead acid battery intrinsic internal resistance depended entirely upon such factors as physics, chemistry, and construction - but I could be wrong.
