Might be worth posting to reinforce what John just said about both the Origo alcohol stove and the induction cooktop.
I had an Origo in the fiberglass shell. Slow, but if you object to propane--which I don't, especially if you're in the US--it's a good alternative to the more complicated, and way more expensive, diesel cooktops, which also heat slower than gas and sometimes smell. No plumbing, no pumps, etc.
Induction cooktops are super; I do most of our home cooking on an 120V/1800 watt unit. Just remember that you have to use ferrous cookware, which rules out the aluminum pans most commonly found in camping level cookware. And, just like a microwave, the depletion RATE on your batteries is pretty great even if the overall amp-hours taken out aren't that high. In theory, this will shorten battery life, but some (including me) figure it's a reasonable tradeoff.