ok, just an idea I've been toying with... I rekon at events I'm gonna be draining the power from the battery alot due to ICE/tv/camera battery charging etc etc. so IS it possible to have some sort of digital or LED display to indicate the power left in the battery, actually IN the cabin??
like on my laptop its got a digital display on the front showin in percent whats left of battery power? maybe a small bit on the dash to indicate this, I've no idea where to start like, any ideas welcome .