Worst off-grid fails and disasters

Mine was the shepherd's hut winter of 2019 — I genuinely thought a 100W solar panel and optimism would see me through. Turns out optimism doesn't charge batteries. Got about three days before I was reduced to charging my phone in the car like some sort of medieval peasant. The real kicker? Spent the entire time blaming the panel manufacturer instead of accepting that I'd basically tried to power a small village with a desk lamp. Now I'm that insufferable person who lectures everyone about load planning at dinner parties.

Mate, the kettle tax is real. Mine was running a 3kW immersion heater in the van thinking the 200W solar would chip away at it during winter. Spoiler: it didn't.

But the actual disaster was forgetting to check battery voltage before a week away in the Peaks. Came back to a totally sulphated 100Ah lithium setup — cost me about £800 to replace. Should've fitted a basic monitor from the start instead of "I'll just remember to check it."

@LochLover — 100W in a shepherd's hut is genuinely ambitious. I've got triple that in mine now plus a small wind turbine and I still run the heating off mains in January. The optimism phase is expensive.

The really embarrassing bit? I told everyone at the meet-up I'd "gone off-grid properly." Had to quietly admit I'd hardwired back to the campsite hookup within three months.

Tried running an inverter off a dodgy leisure battery whilst anchored up. Battery voltage collapsed mid-meal and fried half the boat's electrics. Learned the hard way that undersized wiring and wishful thinking don't mix. Now I'm evangelical about proper load calculations — costs nothing upfront but saves a fortune later.

Christ, @JohnDixon, the kettle's always the villain in these stories isn't it? Mine was thinking a Victron MPPT could solve physics. Ran the kettle, toaster, and hairdryer off a 400W solar array in November. The system didn't fail—it just laughed at me. Battery went from 100

Tried charging the EV off a dodgy DIY setup once while the boat was on shore power. Didn't realise the battery monitor was reading backwards. Nearly set the whole thing on fire before the Victron cut it out. Now I religiously check everything twice. Expensive lesson that one.