BodgeItAndScarper

State of Charge (SOC) — how much juice is left in your batteries as a percentage. Why it matters for a static caravan specifically: Lithium (LiFePO4) is fussy about it.

The cable gauge really depends on your battery voltage and run length. What are you working with — 12V, 24V, 48V? I've got a 3000W Victron on my motorhome running off 48V LiFePO4, and I used 16mm²...

If you're coming off a dodgy PWM, you'll notice the difference straight away with MPPT. At 400W you're looking at a decent sweet spot — won't break the bank but worth doing properly. I'd lean...

SOC = State of Charge, basically your battery's fuel gauge. Shows what percentage of capacity you've got left. Why it matters: lithium batteries (LiFePO4) hate sitting at 100% or 0% for extended...