The Cruiser is the big one which can use any combination to reach 24v. (6x4, 12x2) They do have battery systems, but, from what I've heard, you do not have to use them.The 800 has an integral battery that recharges off a regular power outlet.

Variable F-R on same throttle, or remote placement. No need to fire up the motor as it is always ready to go. Sounds like a 40 watt panel and this in my climate would be the peach.