One-day outage essentials: cold food, internet and light
A conservative 24-hour planning budget combining a cycling fridge, router, lights and four hours of laptop use.
Battery target for 1 day
Stated battery capacity, including a 30% extra energy margin on demand and 80% usable energy.
Adjust this exampleThe illustrative bundle uses about 1,592Wh per day. The 1kWh- and 2kWh-class stations fall short after reserve, while the documented 3kWh- and 4kWh-class candidates cover the full battery-only target.
- Energy per day
- 1,592 Wh Power × hours × quantity
- Power check
- 143 / 313 W Simultaneous / peak — planning values
- Solar target
- 650 W 3.5 peak sun hours · 75% yield
Solar is a separate estimate. The battery target is calculated without intermediate recharging.
Define your power requirements for United Kingdom.
No product is presented as a United Kingdom candidate until its exact 230V/50Hz Type G execution, UK certification route, local support and seller evidence are verified.
2,587 Wh
Includes days, the extra energy margin on demand and the 80% usable-energy allowance
143 W · 313 W
Verify the exact appliance and inverter together
230V · 50Hz · Type G
Confirm the exact 230V/50Hz Type G execution, supplied mains lead and socket layout, model suffix, UK certification, warranty and local support before purchase; buying routes stay inactive until the seller, stock and delivered GBP total have been verified
The devices in this example
These are sensible starting values. Change the hours and exact devices in the planner to make the answer yours.
Fridge — daily average
720 Wh per day- Average consumption
- 30 W
- Entered peak
- 200 W
- Hours per day
- 24 hours
- Quantity
- 1
Router / modem
432 Wh per day- Average consumption
- 18 W
- Entered peak
- 25 W
- Hours per day
- 24 hours
- Quantity
- 1
LED lights
180 Wh per day- Average consumption
- 30 W
- Entered peak
- 30 W
- Hours per day
- 6 hours
- Quantity
- 1
Laptop
260 Wh per day- Average consumption
- 65 W
- Entered peak
- 100 W
- Hours per day
- 4 hours
- Quantity
- 1
Do not power everything by habit
During an outage, shortening laptop hours and turning networking off overnight can materially reduce the battery target.
A fridge is not a fixed load
Ambient heat, door opening and warm food change compressor duty cycle. Measure your appliance when outage planning matters.
Calculation detailsSee the assumptions behind this answer
- Fridge averages 30W across the day and has a 200W start event
- Router and modem average 18W continuously
- LED lights total 30W for six hours
- Laptop averages 65W for four hours
How the battery target is formed
1,592 Wh per day × 1 day × 1.3 ÷ 0.8 ≈ 2,587 Wh
The daily consumption above is rounded for display. The calculation uses unrounded values. The factor is 1 + the extra energy margin, added to demand rather than kept as battery charge; the 80% usable-energy allowance is a separate factor.