Mex says the fastest recharge and least gen time is to do just that--kick off with such high amps per battery AH size that amps taper from the start, with no constant current time at first.
The problem with that is you only save a few minutes overall in gen time, but the charger that can do those high amps costs more than the somewhat lower amp charger.
Goes back to the economics of buying an 80 amper vs a 60 amper--big price diff, vs how many minutes saved doing a 50-90.---one of the things my three ugly graphs tries to show. There is an optimum compromise you can pick depending on your situation--somebody else might pick a different one-- everyone has his own situation)
