@OldSailor spot on about footprint — that's been my deciding factor too. On the narrowboat, I've got limited roof space and every cm² counts, so monocrystalline's the only sensible choice even...
Mate, voltage drop is the real killer here. If you're going 12V from battery to inverter, even a short run can lose you critical amps with undersized cable.
What's your battery bank voltage and...
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