Ver en españolHow 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 | 10–15W | 33–50h | 66–100h |
| IP camera | 5–15W | 33–100h | 66–200h |
| Laptop | 45–65W | 7–11h | 15–22h |
| 43" LED TV | 80–120W | 4–6h | 8–12h |
| LED lights ×5 | 25–40W | 12–20h | 25–40h |
| Fridge A++ | 80–150W | 3–6h | 6–12h |
Solutions by what you need to keep on
Essential
Router + cameras + mobile
€50–300
- UPS (€50–150) for instant switchover
- Or 300–500 Wh station for more autonomy
- Router active 24–50h
- Mobile and tablet charging
⭐ RecommendedComfort
+ Laptop + TV + Lights
€400–800
- Work from home during the cut
- TV on for 4–8h
- LED lights all night
- Fridge active 3–5h
Full autonomy
+ Fridge + Whole house
€900–2,000
- Fridge active 8–15h
- House running normally
- Rechargeable with solar panel
W vs Wh — the most common confusion
W = how fast water flows (instantaneous power). Wh = total tank capacity (stored energy). 1,000 Wh delivers 1,000W for 1h, or 100W for 10h.
Brand comparison
| Brand | Model | Capacity | Tech | Charge | Price |
|---|---|---|---|---|---|
| EcoFlow | DELTA 2 | 1,024 Wh | LFP | 80% in 50 min | ~€700 |
| BLUETTI | AC180 | 1,152 Wh | LFP | 80% in 45 min | ~€800 |
| Jackery | Explorer 1000 Pro | 1,002 Wh | NMC | 80% in 1h | ~€650 |
| Anker SOLIX | C1000 | 1,056 Wh | LFP | 80% in 58 min | ~€600 |
Shop the setup
Backup power for the next outage
The kit described above, in two product categories. Links open your local Amazon store and help fund the site at no extra cost to you.
- Fridge + router
- Silent, indoor-safe
- Recharges from solar
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 3–4 times the nominal consumption for the first few seconds).