Camping-fridge Power Planning
Estimate energy for a portable compressor fridge while handling DC connection limits, cycling, ambient temperature, and startup uncertainty.
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Choose the real route
If the fridge runs from a regulated 12 V outlet, select DC; if its AC adapter is used, select AC. The routes have separate efficiency assumptions, and AC can add inverter idle draw.
Use a measured daily energy value when available. Cycling changes with ambient temperature, ventilation, set point, contents, and lid openings. A label’s maximum input is not a daily average.
Connection check
Confirm socket voltage, current, connector, fuse requirements, and cable suitability in the product manuals. A result labeled energy-qualified does not prove DC connection compatibility.
Measure at the connection you will use
A reading at an AC adapter includes that adapter’s consumption. A reading at the fridge’s DC input describes a different point in the power path. Use the corresponding route in the calculator and do not enter station battery discharge as appliance energy: the model adds station conversion losses separately.
Use daily kWh for a representative full-day observation, including the overnight period. Enter the trip duration as the plan window. If you use average watts instead, enter the elapsed hours represented by that average without another duty factor.
Account for the rest of the campsite
Add lighting, phones, pumps, and other loads separately. A DC socket may have a shared limit with other outlets; the station’s total battery capacity cannot establish that every socket can run every device. Check the exact manual and cable requirements for the complete setup.
Estimate the battery-only plan before adding solar. You can then use the solar calculator to explore replenishment with explicit sunlight and concurrent-load assumptions. A positive daily energy balance still does not guarantee power through a cloudy day or overnight.
Worked illustration
An illustrative 48-hour DC fridge plan
Suppose a meter at the fridge’s DC connection records 0.4 kWh per day. A two-day plan uses twice that energy. The example assumes the direct connection has been checked separately.
- Energy delivered to the devices
- 800 Wh
- Estimated nominal battery capacity required
- 988 Wh
Assumptions: full starting charge, 10% stopping reserve, 100% capacity factor, 85% AC efficiency, and 90% USB/DC efficiency. AC idle draw is 5 W for 0 hours when an AC load is present. Values are rounded for display.
Operating and startup power are intentionally unestablished in this energy illustration. Check those requirements and the actual connections before choosing equipment.
Build your own plan
The tool starts empty. Add the exact equipment you intend to use, choose the route it will connect through, and replace illustrative values with your measurements. Review Advanced settings before treating the result as a shopping requirement.
Step 2 · Check the requirements
Results
Your plan summary will appear here.
- Add each device and its time in this plan.
- Review the editable assumptions.
- Choose Calculate requirements.
No personalized result is shown until then.
Device
Related reading
Published by Portable Power Calculator. This is specification-based planning information, not a hands-on product test or electrical safety assurance.