My first stepper (all of 6 months ago now) actually burned OUT a 2.4 volt LED!
But now it does charge up 4 of the nicad batteries now and then that go out in the yard lights when the sun don't shine on them in the shade.
My newest one is merrily spinning without a load right now in some of the best steady wind we have had in weeks. I just moved the battery bank (4 x 105's) to the new solar panel mount pole and of course--the wind came up.
It should be doing at least 40-50 watts--but it's just spinning.
The one waiting for me to complete it is still sitting out in the rain with the plate rusting slowly.....little 14" rotor plate.
I have a few pair of jeans left without a hole or two here and there from acid--y'all do check the SG just about every day don't you??--hi-hi
I added an ounce (mixed with water first) to each cell of the EDTA stuff--it bubbles nicely.
I've got them on the "jerry desulphater"/wattgas thingie just for giggles, and due to no sunlight today.
No isolator transformer---100 + volts isolated or not--that's an electrical conducting substance (sulphuric acid) that's around the tops of batteries---GFCI for ME!!
My kill-a-watt meter seems to be in shipping limbo.
My homebrew solar charger/dump/controller still needs programming....
Dang...this stuff is addictive!