Nice setup. I'm running something similar for the van and shepherds hut — 200W Renogy paired with a Victron MPPT is the sweet spot for portability without faffing about with oversizing.
The real...
Yeah, been there with the Arduino rabbit hole on my van conversion setup. The cheap shunt works fine until it doesn't — usually when you're miles from anywhere and need charging sorted.
What...
Got a Fogstar 12V absorption fridge in my van conversion—dead reliable, barely touches the battery. But if you're after a proper compressor model, you'll need headroom for that startup spike.
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