Need a quick answer from the battery guru's
I thought I remember this being talked about, but knowing that the battery chargers in the RV/trailer tends not to deliver enough amps to bring the batteries up from a low charge (say like overnight u...
Forum Discussion
hershey wrote:
The RV's converter will normally be your best, most efficient charging system.
But: Whatever you do, don't get tempted to try to use both the onboard converter and a battery charger. You'll just be shooting yourself in the foot and slow the charge process down to a snails pace.
What strange advice! You can use both and they will add their amps so long as both chargers have their voltages above battery voltage.
Whether, while adding, the total is higher than one charger could do depends on the battery acceptance rate. eg, two 40s make 80, but to get that 80 you need the batteries accepting 80 or more amps. No point putting two 40s on when acceptance rate is 40. Each will just do 20 to make the 40 total.
As battery voltage rises under charging, the charger with the lower voltage will be taken out of play first (its amps taper before that) then the one charger finishes the job.
You can have lots of chargers all charging away on the same battery bank.
