Comparison
| Type | Time | Cost |
|---|---|---|
| UPS | Minutes-hours | From 5 000 ₽ |
| Generator | Days (fuel) | From 30 000 ₽ |
| Battery station | Hours-days | From 100 000 ₽ |
For a house
Boiler + pump + fridge: UPS 1-3 kW or a battery station; long outages — generator with ATS. Gas generator — quiet and cheap fuel.
For an office
Server UPS — online 5-10 minutes to shut down; long — generator or battery. Critical loads on the UPS, the rest — on the generator.
Design
ATS, cable from the generator with the correct section, grounding of the generator, ventilation and noise. The switch is interlocks.
Solar + battery
A hybrid inverter with batteries covers short outages and reduces the bill — the most popular option now.
Why design
A wrong backup is a burned generator or a dead boiler in winter. The design counts the load and the time.