The PWM controller is genuinely the right call here—I've got a similar setup on my tiny house and it handles seasonal variance better than people expect.
Depends entirely on your actual consumption, mate. What's your daily usage looking like? Are you running heating, cooking electric, or just lights and a laptop?
For a static you've got the luxury...
The cycle depth point @CliffGazer raises is massive. I've got a 10kWh Fogstar LiFePO4 setup running my tiny house, and I can genuinely use 80-90% of the capacity without worrying.
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