Right, motorhome retrofit — been there. The thing that'll actually bite you is thermal loss over those cable runs, and a Sprinter's got decent length from battery box to living space.
Here's what...
Brilliant thread, @PeakVanLifer. I've learned this the hard way with my setup — spent two years undersizing and it cost me dearly when winter hit.
The bit everyone glosses over is thermal losses...
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