thats true i didnt think of the power issue this is a new idea but i think that they have power converters i used to have a travel trailer and it had an a/c unit on it that would run if it was hooked up to the truck i would have to start it every 2-3 hours and charge the batteries but if it ran that a/c unit then i think it would run a 250 watt hps? so in an rv your driveing alot so you would have charged batteries or maybe a small genorator just for the growing area something small?

-Bomb