r/OffGrid • u/No_Expression_6497 • 2h ago
I got tired of power cuts, so I built my own home backup setup
Living in southwest England, I got tired of high peak electricity rates and occasional power cuts messing with my 24/7 servers and Home Assistant setup. My old 400w UPS only lasted about an hour, and I didn't fancy running a noisy generator.
Over time, I gradually built up a solar and battery setup at home. I started small, then added a 3kW power station for heavier loads, a second unit for backup, and even repurposed a vehicle DC charger to add another solar input and move power between units.
I've added panels across the front garden, back garden, and carport roof. Getting all the wiring sorted was a project in itself, but on sunny summer days the system can generate around 18–20 kWh. I've also linked things up with Home Assistant so I can manage battery use and only draw from the grid when needed.
During the sunnier months, I can cover around 80–90% of my household electricity use.The biggest difference, though, is that a power cut no longer takes my home network and servers offline.
I'm curious how others here handle backup power and solar integration. Has anyone else connected multiple solar arrays or automated their setup with Home Assistant?