Weekend camping: fridge, lights and laptop
A two-day camping energy budget for a compressor fridge, camp lighting and three hours of laptop use each day.
Battery target for 2 days
Stated battery capacity, including a 20% extra energy margin on demand and 80% usable energy.
Adjust this exampleThe example consumes about 885Wh per day. Two battery-only days exceed the 1kWh- and 2kWh-class stations, while the documented 3kWh- and 4kWh-class candidates can cover the full conservative target.
- Energy per day
- 885 Wh Power × hours × quantity
- Power check
- 113 / 210 W Simultaneous / peak — planning values
- Solar target
- 300 W 4.5 peak sun hours · 75% yield
Solar is a separate estimate. The battery target is calculated without intermediate recharging.
Define your power requirements for the United States.
No product is presented as a United States candidate until its exact regional execution, local compliance route, support and seller evidence are verified.
2,655 Wh
Includes days, the extra energy margin on demand and the 80% usable-energy allowance
113 W · 210 W
Verify the exact appliance and inverter together
120V · 60Hz · Type A/B
Exact US model, applicable safety listing and local warranty still required
The devices in this example
These are sensible starting values. Change the hours and exact devices in the planner to make the answer yours.
12V fridge — daily average
540 Wh per day- Average consumption
- 22.5 W
- Entered peak
- 120 W
- Hours per day
- 24 hours
- Quantity
- 1
LED camp lights
150 Wh per day- Average consumption
- 25 W
- Entered peak
- 25 W
- Hours per day
- 6 hours
- Quantity
- 1
Laptop
195 Wh per day- Average consumption
- 65 W
- Entered peak
- 100 W
- Hours per day
- 3 hours
- Quantity
- 1
Pre-cooling is stored energy
Cool the fridge and contents before departure where possible. Warm contents on arrival can keep the compressor running much longer.
Measure shade at the campsite
Four and a half peak-sun hours is an input, not a promise. Trees, panel angle and clouds can make the real day much weaker.
Calculation detailsSee the assumptions behind this answer
- The fridge’s 45W compressor is represented by a 50% daily duty cycle
- Camp lights total 25W for six hours
- Laptop averages 65W for three hours
- Solar planning uses a 75% yield rather than panel nameplate output
How the battery target is formed
885 Wh per day × 2 days × 1.2 ÷ 0.8 ≈ 2,655 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.