BFL13 wrote:
A 35 amper on 220AH takes about 3 hours to do a 50-90, while a 70 amper takes about 2 hours. (A 55 amper takes about 2.3 hours.) So I prefer the 70 amper to save an hour of gen time. But that means a bigger generator of course.
Perfect example that half the amps does not take twice as long.
Likewise double the amps does not cut charging time in half.
Example is 50-90 where the higher the final percentage the less effect more amps gives in time saved. Just saying if going to 95 or 100 percent the time savings will not increase and may drop slightly.
Either way is fine. Don't forget to pull some #4 wire to get max amps from the big converter.