I looked into that a while ago (and a similar one), and it looks like any power produced from the TEC is considered a bonus, and is in the range of 1-5W, probably only enough to charge a phone, etc.
I'm looking to produce a sustained 150W + to charge deep cycle batteries.
Scaling this up, roughly, you would need about 157.5 liters of fuel space, though probably much less if your fuel was more compact (obv you don't fill up exactly 2L of space in the canister while burning twigs). The realistic output of heat/power based on space is probably much more efficient than something this large, considering they say 46 grams of fuel can boil 1 liter of water, and 46 grams is approx 0.046 liters (based on water density).
Somebody please correct my horrible assumptions, but basically, fill an oil drum up most of the way with wood and build a thermoelectric generator and you should be good to go.
(Also, if you're charging deep-cycle batteries, i'm assuming you're not going camping? Maybe solar would be simpler? http://www.mdpub.com/SolarPanel/index.html) (Edit again: I forgot your original post, no solar)
Sorry, this is the one I meant to link to (probably the similar one you mention). Might be a better design to scale up. Don't know if the TEC is any more efficient though.
I looked into that a while ago (and a similar one), and it looks like any power produced from the TEC is considered a bonus, and is in the range of 1-5W, probably only enough to charge a phone, etc.
I'm looking to produce a sustained 150W + to charge deep cycle batteries.