Best battery charger options
I’m running (2) 6v 215AH gc2’s wired in series for a 12 volt system. I am trying to figure out the best/quickest way to charge them with a generator. We will have limited times where we can use the g...
Forum Discussion
You must know a 1000w gen cannot run a 55 amp charger that is not PF corrected. You also know your beloved PDs are 0.7PF and that the running VA of the 1000w inverter/gen is 900VA.
Meanwhile on a Kill-A-Watt with a 0.7 PF 55 amp converter putting out 56.8 amps with battery at 13.7v, or 778w, we see:
124.7v, 11.06a, 980w, and 1383VA.
So please stop posting that you can get 1383VA from a 900VA supply.
Meanwhile, your 9180 amper needs more than a 0.7PF 75 amper doing 75 amps with battery at 14.08. That was pulling 1693VA, so your 1000w gen running that 80 amper at over 1700 was indeed quite remarkable! BUT--look more closely, and just maybe----
You said the batteries were "dead" so let's say 10.5v and jumped to 11.5v with the charger doing 80 amps? So 920w output. Say 85% efficient, or 1082w input. and 0.7PF makes that 1546VA.
To make that work, the "dead" batteries must not have been accepting 80 amps, but some much lower number of amps. You can do the math for what must have been the output watts and then see if you can get the input VA anywhere near 1000. It is true that really dead batteries can only accept a few amps at first, then the amps slowly rise as the battery recovers.
Meanwhile on a Kill-A-Watt with a 0.7 PF 55 amp converter putting out 56.8 amps with battery at 13.7v, or 778w, we see:
124.7v, 11.06a, 980w, and 1383VA.
So please stop posting that you can get 1383VA from a 900VA supply.
Meanwhile, your 9180 amper needs more than a 0.7PF 75 amper doing 75 amps with battery at 14.08. That was pulling 1693VA, so your 1000w gen running that 80 amper at over 1700 was indeed quite remarkable! BUT--look more closely, and just maybe----
You said the batteries were "dead" so let's say 10.5v and jumped to 11.5v with the charger doing 80 amps? So 920w output. Say 85% efficient, or 1082w input. and 0.7PF makes that 1546VA.
To make that work, the "dead" batteries must not have been accepting 80 amps, but some much lower number of amps. You can do the math for what must have been the output watts and then see if you can get the input VA anywhere near 1000. It is true that really dead batteries can only accept a few amps at first, then the amps slowly rise as the battery recovers.
