I've already drawn up plans and sourced a 12v 60aH deep cell battery...
Andrew, What size inverter did you use?? I wont be running much off it, my laptop/350D (sometimes)/QHY8 de-humidifier/QHY8, and the mount + dew control system directly off 12v..
I was thinking that a 600w would do fine for this gear.. and I'd assume it would all run for a couple of nights if need be.