I plan to do a lot of camping. Problem is I still need to continue working online, and so I need to power my laptop that may pull as much as 240 watts at times. Does anybody have any recommendations as to the best way to add a 120v AC port? I think tapping into the high voltage system connected to the drive battery is a bit risky, but I'm worried that tapping into the 12v battery with an inverter would leave it drained by the time I'm done with my 8 hour shift and leave me unable to start my car. The best solution I can think of is to wire a second 12v battery in parallel with the first to get the increased battery capacity, any better ideas?