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
KATOOM wrote:
I have a WFO 55 amp Power Convertor and the trailer is a 2005. Does that help? I was told through other threads that most convertors dont go into boost mode and wont charge the batteries more than a trickle when using the generator. Thats when I was also told that forgoing the power convertor and just using a separate battery charger would work better to bring the batteries up to a more reasonable charge in a short amount of time.
Only works if you have a high enough amp portable charger, not a 6 amp job.
http://www.boatandrvaccessories.com/black--decker-vec1093dbd-12-volt-40-amp-battery-charger.html
Even 40 amps on 220AH is fairly slow as you can see in the graph posted earlier. You could get two of these 40ampers and use both at once to get 80 amps. That would be about the same as the 70amp graph shown.
It is all down to how much of a hurry you are in and how much you want to spend. As you can see in the graphs, there is not much point going above a 30% charging rate as it goes vertical and time saved by going to higher amps becomes very little.
Don't forget your generator may have a watts (VA) limit as to how many amps of charger it will run. That may be the real limit you face. A PF corrected charger can do more amps on that gen , but PF correction is rare among chargers.
