How'd your electrical experiments go? I want to do this too. First I want to properly record the amount of amps (and therefore watts) each system is drawing. Then maybe lower this with LED lights and maybe try to offset with some solar.
I really hate those 1/4 watt, battery tenders though, they're really pricey for what you're getting. I don't mind finding a cheap solar panel on ebay or elsewhere and really want to give peltiers a try, but I'm stuck on what to use as a charge controller. I guess keeping voltage near 14v makes sense even without an alternator, so is there maybe a dual purpose system like that, hook a battery or two (for range) to it and also any electric generation, like solar, and it'll always put out 14v and recharge only when needed, etc? Or plans to build one (more preferable).
My worry with the LEDs is when I'm in DFCO, I want to build them expecting an exact voltage, the 14v thing might do that. I think I'll also need a 555 for when running lights are on to 'dim' my brake lights (same bulb/socket) and have to make my own blinker units. I don't have time to trace and rewire my car ...
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