Start with energy, check output, then think about weight. A camping plan needs all three checks, plus starting information for any relevant motor load.
Start with what you actually use
Write down the devices you intend to bring and the total time you will use each one. Keep essentials separate from optional comforts. This gives you a useful way to revise the plan if battery size or carrying weight becomes a problem.
For each device, choose one energy input: average watts multiplied by total hours, or an established daily consumption in watt-hours multiplied by days. Do not enter both for the same device.
A two-day example
These are illustrative inputs, not typical or measured consumption. The laptop and lighting hours below cover the whole trip.
- Laptop: 60 W average × 4 h = 240 Wh.
- Lighting: 5 W average × 8 h = 40 Wh.
- Compressor cooler: 200 Wh/day × 2 days = 400 Wh.
The separate running-power inputs are 65 W for the laptop, 5 W for lighting and 60 W for the cooler: 130 W together. Average energy use and power while running answer different questions.
Replace the cooler’s 200 Wh/day with your own measured or documented consumption at its AC connection under relevant conditions. A cycling cooler’s running wattage alone does not establish its daily energy need.
A cooler leaves another question open
This example deliberately leaves the cooler’s starting requirement unknown. A battery that covers 680 Wh still cannot receive an overall positive assessment while that relevant requirement is missing.
Check the appliance’s starting information and the power station’s documented capabilities, including applicable duration and conditions. A headline “surge” number alone does not resolve this check. Keep an unknown value marked unknown.
The other devices keep running during a start
To illustrate the arithmetic only: if suitable information for your actual cooler later established a 300 W starting requirement, the laptop and lighting would still add 65 W and 5 W. The check would be 300 W + 65 W + 5 W = 370 W. The 300 W is a chosen example, not a specification for any cooler. It does not replace the unknown value in the saved example.
The finder considers one device starting while all others run; it does not simulate simultaneous starts. A requirement above normal continuous output needs suitable power-station and appliance evidence, including duration. A boost or peak headline alone cannot make that check pass.
Why a 1,024 Wh battery does not automatically cover the weekend
Take the US DELTA 3 base unit as an energy illustration. With the default 90% usable charge range, 85% efficiency and 3 W assumed idle use across 48 hours, the estimate becomes:
That is below the 680 Wh device plan, even though the simultaneous 130 W running requirement is far below the model's 1,800 W total continuous rating. Both the capacity and the output figures are manufacturer ratings; the efficiency and idle figures are editable ChooseWatt assumptions, not measured DELTA 3 behavior.
A small energy gap is still a gap under the selected assumptions. Revise genuinely unnecessary use, establish a feasible recharging plan or research a larger energy allowance. Do not turn an unknown cooler start into “no additional startup” just to obtain a positive result. Sufficient energy would still leave that starting check open.
Measure the cooler's energy over a relevant period and in relevant conditions. Hot weather, thermostat setting and use can change its consumption. A solar-input ceiling does not establish the weather or guarantee daily harvest. For a smaller plan, the RIVER 3 / DELTA 3 laptop-and-router comparison shows how shorter use can make a lighter model practical.
Compare what changes your trip
The finder also allows for assumed conversion losses and output idle use. With its defaults, two days add 144 Wh of assumed idle energy, separate from the 680 Wh device total. Neither number is a measurement of a particular power station.
Set a realistic carrying limit and check the exact model’s dimensions, shared outlet limits and US 120 V version. More rated capacity may change transport as well as estimated energy headroom.
This plan covers devices connected directly through AC outlets. It assumes no solar harvest or recharging during the trip. If you intend to recharge, assess that separately instead of subtracting an unverified contribution.
Every value is editable. Review the example and any saved plan before choosing which to use.
Sources and assumptions
- Virginia Cooperative Extension: Estimating Appliance and Home Electronic Energy UseBackground on energy estimation and varying appliance consumption. The example values and selection rules above are ChooseWatt assumptions.
- ChooseWatt calculation method
- EcoFlow DELTA 3 user manual — US examples; solar charging and technical specifications, PDF pp. 16 and 25–27Rated energy and output limits; ChooseWatt calculates the energy illustration above.