Winnebago Electric Motorhome on a F-53 chassis

jharrell wrote:

time2roll wrote:
OK the 9kW to 12kW generator will not push the MH at full speed but maybe get you to 200/300 mile range (diesel+battery) before stopping. For many that would be enough that they were stopped for the day. Plug in a few days or more while you slow charge before you move again.

Not perfect but might work for a few until the system is improved.

So looking at the specs, which where difficult to find the Winnebago has a 127kwh battery and a 60mph max speed. It will not go 125 miles at 60mph, the max range figure are at slower city speeds 30-40 mph where air resistance is much lower. But lets give them the benefit of the doubt and say it gets 125 miles at 60 mph on 127kwh. Thats about 1 kwh per mile or
about 63kw of constant draw from the battery. It would take 3.3 hours to go 200 miles consuming 200kwh of power meaning the generator has to makeup 73kwh.

Thats a 22kw generator to go an extra 75 miles and arrive with a dead battery. It would need a 34kw generator to go 300 miles. A 12kw generator would give it maybe an extra 40 miles and I am being very generous in the math, probably much less.

I was just about to post something similar.

Until battery technology gets up to maybe 25% the density of gas/diesel...it's a no go for RV's where a common usage pattern is a few hundred miles to a remote area (ie: not charging stations) followed a day or two later by another few hundred miles...particularly if like other EV's it comes in 1/3 higher priced than an ICE.