Runtime evidence · sourced load
A 12V camping fridge draws 13.5 W while running. 67 stations clear the capacity, inverter, and startup checks at that load.
By the BatteryRank Engineering Team
01 · Runtime ladder
Nominal capacity × depth of discharge × inverter efficiency ÷ sourced average draw.
| Capacity class | Estimated runtime | Evidence |
|---|---|---|
| 300 Whstep 1 | 17 hr | 12V camping fridge (45L) load · 2026-07-06 |
| 500 Whstep 2 | 28.3 hr | 12V camping fridge (45L) load · 2026-07-06 |
| 1,000 Whstep 3 | 56.7 hr | 12V camping fridge (45L) load · 2026-07-06 |
| 2,000 Whstep 4 | 113.3 hr | 12V camping fridge (45L) load · 2026-07-06 |
These are comparison projections, not a promise. Temperature, inverter behavior, cycling, and the individual station's measured delivered capacity can change real runtime.
Personalize the estimate
Replace the representative load with a typical-day meter reading. Add the running and startup watts from your own label or meter to update the inverter checks. These entries only change this page view.
Sourced baseline: 13.5 W average from 45 W running at a 30% duty cycle. 12V camping fridge (45L) source · 2026-07-06 ↗
Blank uses the sourced default. Enter nameplate watts or a meter reading while the compressor or pump is running.
Leave blank to use a sourced figure when available. Enter real startup watts only from an OEM source or an inrush meter; an LRA amp rating is not a watt value.
Default follows this page's cited use case. Average energy is assumed to continue through this window.
Average load 13.5 W · running check 45 W
300 Wh nominal
17 hr
500 Wh nominal
28.3 hr
1,000 Wh nominal
56.7 hr
2,000 Wh nominal
113.3 hr
Runtime ladder uses the same comparison assumptions as the table above. Station-specific fit below uses each model's capacity and inverter data.
67 of 80 stations pass the capacity, running, and startup checks for 24 hr using published station specs; appliance startup remains unverified.
Passes the entered checks
Passes the entered checks
Passes the entered checks
Passes the entered checks
Passes the entered checks
Passes the entered checks
Station checks use data on linked model profiles. Temperature, compressor cycling, wiring, inverter behavior, and actual starting current can change results.
02 · Reading the numbers
A 12 V compressor fridge is the one appliance here that can skip the inverter entirely. Running it from the station's DC socket avoids the DC-to-AC conversion step and the losses that come with it, which is why the same fridge on the same station can last noticeably longer on the 12 V outlet than on a wall socket.
Running it on AC out of habit, through the fridge's bundled mains adapter, and paying the inverter tax for no reason. The other one is trusting the rated draw: a compressor fridge cycles, and its duty depends almost entirely on ambient temperature and how often the lid is opened. The same fridge is a modest load in spring and a serious one in a hot vehicle.
Our figure is a steady-state duty for a mid-size 12 V fridge at moderate ambient temperature. Pull-down from warm, direct sun on the cabinet, and frequent opening all push consumption well above it — plan a margin rather than the projection.
03 · Passing stations
Some links on this page are affiliate links. BatteryRank may earn a commission at no extra cost to you. Commission never affects whether a station passes these checks; when two stations tie on every measured criterion, the one with a live retail offer is shown.
Lightweight fit
Why it fits
5.7 kg, 9.3 kg below the 15 kg preferred limit
Main compromise
9,800 W below the highest sourced solar input across 67 eligible models
Best all-round fit
Why it fits
72 BatteryRank score, considered alongside this role's capacity and output requirements
Main compromise
7.7 points below the highest-scoring eligible model (66 of 67 eligible models have this sourced value)
Longer off-grid stay
Why it fits
96.3 projected runtime hours
Main compromise
677.4 hours less projected runtime than the longest-running eligible model across 67 eligible models
This ordered data view is separate from the three recommended buying strategies above.
Runtime uses each linked model's sourced capacity and output data; open its dossier for provenance.
Solar effect
Computed with this model's sourced solar-input limit and BatteryRank's published harvest assumptions. Check the solar method → · Model sources →
04 · Evidence record
