24v needs fewer amps to supply a given power .... 24v has less line loss with on same size wire ....24v was/is used on heavy equipment, maybe they did it for jeeps to make'em common with other equip .... the downside [expense and availability] is less since 24v has become common for solar setups

Bill


Moved over to the Passing Lane

"When we tug a single thing in nature, we find it attached to the rest of the world" ~ John Muir
"When we tug a single thing on an old truck, we find it falls off" ~ me
Some TF series details & TF heater pics