
Security equipment draws modest, constant power, so it can be backed up with a relatively small solar-and-battery system on its own circuit. The aim: cameras keep recording, the fence stays live, gates keep opening and alerts still reach your phone during an outage.
Key takeaways
- Put all security loads on one backed-up circuit.
- Include the router: without it, no remote viewing or alerts.
- UPS for instant switchover; batteries for hours; solar to recharge.
- Size from measured loads and required runtime.
01What to back up
02The layers

03Design notes
- Measure real loads, including night-time IR and heaters
- Plan runtime for your typical outage, not the best case
- Protect with surge protection and good earthing
- Keep batteries ventilated and away from heat
- Include the system in maintenance visits
See battery and inverter sizing and security system backup power.
04Frequently asked questions
How big a solar system do I need for CCTV?
It depends on the number of cameras, recorder, other security loads and runtime. It's usually far smaller than a whole-house system.
Will my cameras record during an outage?
Yes, if the recorder, switch and cameras are on the backed-up circuit.
Do I need a UPS as well as solar?
A UPS or hybrid inverter with fast switchover prevents equipment rebooting at the moment the power fails.
