Do those flashlight emitters have a switching regulator that can adjust the current driving the Luxon LED so you can vary the intensity? Seems that the one I have is a little too bright and if a switcher was used to drop the supply voltage say from a couple of Lithium cells in series or maybe even a single cell you would gain some efficiency and allow some really long run times at a low setting. Just in case you get trapped in a cave in or something.
I also have to wonder why those chargers are so heavy??
Wheather or not you can make money is dependent a lot on your local electric utility. One utility in Wisconsin, (WE Energy, unfortunately not my utility) pays more for power produced by wind or solar than they charge for their "regular" power. So some people sell their solar generated electricity during the day for 20 cents a kw-hr, and buy power at night at 10 cents.
Actually it is a good idea to generate power locally because your local neighbors end up getting it and saving the utility companies the transmission losses if they were supplying it. BUT NOOOOOO! They want to keep the cake and eat it too!
From what I've heard from a few professors at my university, in Missouri, having your own grid tied alternative energy system is heavily discouraged. If something even as simple as a lightning strike shorts out a component of the electric grid, the power companies wil sue you for damages if you have an alternative energy system that is grid tied, regardless of whether or not it had anything to do with any damage to the grid.
Further, Missouri has no financial incentives for them from what I've been able to gather.
Do not consider this hard fact, as this is what I've heard. I have yet to find the specific laws pertaining to the issue.
I think they are wearing feathers . . . trying not to be too picky here
Missouri must be behind the times. In many states, insurance is required but the maximimum required is very reasonable, and the design of modern grid tied invertors makes it impossible for them to produce power if the grid isn't active. There are some specific UL standards that relate to this, and it isn't a problem. Your professors need to stick to what they know something about, it sounds like.