Roadtrek introduces the RS E-TREK

loving retirement wrote:

Let's do some simple math here. I can't get a couple of things they are claiming to add up. Eight batteries, I am assuming standard deep cycle batteries so that should be about a 960 to 1,000 amp/hrs battery bank. The A/C can be made to last longer on batteries by simply lowering the BTU rating of the A/C unit. RT 170, 190 and 210's all have a 12,000BTU model, but the standard RS only has a 11,000/BTU A/C, I don't know what the RS-E has. Recharge the depleted 8 batteries in 40 minutes - WOW I want to see that engine/generator that can put 960amp/hrs in those batteries in 40 minutes! How could a 240 watt solar panel recharge these 8 batteries, on a good day that panel is only putting out about 20amps an hour - it would take a minimum of 48 hours of daylight to fully recharge the battery bank.

From the 2nd video the individual batteries look to about 75 amp hours each, X 8 = 600 amp hour battery bank.
Using the 50% discharge rule then only 300 amp hours need to be recharged.

Our Limo Bus/Motor Home uses the same 'all electric, no-shore power' concept and we can recharge our smaller AGM battery bank in about 20 minutes with 265 amp alternators. So it's feasible they can recharge 300 amps in 40 minutes.

I have serious doubts about getting anywhere near even an hour of A/C usage from the battery bank, on hot days, running the A/C on the highest setting.