you know....what ever.....If I am in the boonies and have to charge with my genny I want this thing putting out as much as it can for as long as possible. Isn't that what all these 'what converter charges best" threads are all about? To heck with the stupid graphs and charts. This converter just proved to me that it will put out big time till my batts are close to 90% or before tapering off to trickle. It is 6 hrs since the first post and it is still putting out 10amps at 14.2 volts. If I shut it down now the batt volts will settle in at at least 12.8 which in my mind is 100%. These Iota charges rock! Wish I had the 55.