The real question is what your actual daily surplus looks like. 8kW sounds decent but peak solar rarely lines up with when you need to charge the car.
I've got a similar setup and honestly, it's...
Been through this myself with a small garden studio setup. Summer's deceptive — you get brilliant sunshine and think you're sorted, then January hits and reality bites.
My array looks decent on...
400W rigid panels are solid for a budget build, though winter'll be rough depending on your latitude. The real bottleneck's usually the battery size on tight budgets.
The Fogstar BMS will lock you out below 0°C—that's your real headache in a Scottish winter van. @BlownFuse is spot on about lithium plating, it's not worth the risk.
What actually works: stick a...
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