Ver en espaรฑolHow to calculate what you need
Before looking at brands and models, you need to know two things: which appliances you want to keep on and how many hours of autonomy you need. With those two data points, the calculation is straightforward.
The formula
Add up the wattage (W) of all the appliances you want to keep on. Multiply by the desired hours of autonomy. That's the minimum Wh you need. Add a 20% safety margin.
Real consumption by appliance
| Appliance | Real consumption | 500 Wh | 1,000 Wh |
|---|---|---|---|
| WiFi router | 10โ15W | 33โ50h | 66โ100h |
| IP camera | 5โ15W | 33โ100h | 66โ200h |
| Laptop | 45โ65W | 7โ11h | 15โ22h |
| 43" LED TV | 80โ120W | 4โ6h | 8โ12h |
| LED lights ร5 | 25โ40W | 12โ20h | 25โ40h |
| Fridge A++ | 80โ150W | 3โ6h | 6โ12h |
Solutions by what you need to keep on
Essential
Router + cameras + mobile
โฌ50โ300
- UPS (โฌ50โ150) for instant switchover
- Or 300โ500 Wh station for more autonomy
- Router active 24โ50h
- Mobile and tablet charging
โญ RecommendedComfort
+ Laptop + TV + Lights
โฌ400โ800
- Work from home during the cut
- TV on for 4โ8h
- LED lights all night
- Fridge active 3โ5h
Full autonomy
+ Fridge + Whole house
โฌ900โ2,000
- Fridge active 8โ15h
- House running normally
- Rechargeable with solar panel
Frequently asked questions
A UPS has instant switchover (the appliance never actually shuts down) and is designed specifically for power cuts. A power station is more versatile and has higher capacity but may have a minimal delay on switchover. For sensitive routers and computers, the UPS is better. For extended autonomy, the power station.
Yes, as long as the battery has enough output power (minimum 1,000W continuous) and you account for the compressor startup surge (can be 3โ4 times the nominal consumption for the first few seconds).