Short answer: Yes. A 12 V 100 Ah lithium battery (~1,150 Wh usable) runs a typical 12 V compressor fridge for about 2 days, but a residential fridge through an inverter for only about 8–12 hours.
| Fridge | Typical use/day | 100Ah LiFePO4 | 100Ah AGM (50%) |
|---|---|---|---|
| 12V compressor fridge | 400–600 Wh | ~2 days | ~1 day |
| Residential (via inverter) | 1,500–2,500 Wh + inverter idle | ~8–12 h | ~4–6 h |
| Absorption (propane mode) | tiny 12V for controls | many days | many days |
Hot weather, frequent door openings and a warm load raise use. Use the runtime calculator with your fridge's average watts.
Safety: These are general estimates, not a design. Follow your equipment manufacturer's instructions and local electrical code, and consult a qualified electrician for anything connected to shore power, a house, or high-current batteries.
About 2 days for a 12 V compressor fridge using ~500 Wh per day on lithium.
For lights, fans, a 12 V fridge and phones on a weekend, often yes with some solar. For a residential fridge or inverter loads, plan on 200–400 Ah or more.
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