[ajford]

Definitely something to consider. I wonder if there's some value to a secondary/supplemental seasonal battery that can be added for part of the year to handle the extra load.

Would come down to whether the installation/removal (to lower the "dry" weight for the warm seasons) would be worth the energy savings of not hauling around the supplemental battery weight.

Other options might be to use some kind of thermal mass for heating, perhaps a large heated mass or fluid tank? Not sure if there's any benefit there though beyond being able to swap out the fluid tank between runs faster than charging a battery.