Hi, I need to get power to a number of machines within an environment where there is zero access to electricity. I've extensively explored the possibilities of using a power generator, but this would mean using a minimum of 250m of electric cable, and a huge generator - expensive and impractical... I come across several manufacturers os battery powered sound-systems, but I'm gonna need extra power for the machines: portable computers (although these can run on their own batteries for a while), a Korg Zero 8, a medium size mixing desk, a sound card... Not much else. Any ideas? Can you get battery packs into which you can plug in gear? I've seen this system for lighting for film shoots, light that come with their own external battery packs... Similar thing for sound? This is for to shoot a music session for a film, in a v. special location. Any help would be great, thanks in advance!