Good, I'm not the only one who tripped over this. A generator might be an interesting addon... not sure if that's cannon (not a space exploration history major) but something that can burn a bit of jet fuel in exchange for power. On my low mun orbit goo space experiment I had PLENTY of fuel but had to keep results and transmit on my way back to Kerbin. Still a bit of a chore burning long enough for 3 data points on a simple path like that.