PORTABLE POWER · BUYING DECISIONS
Start with two separate questions: can the station start your refrigerator, and does it store enough usable energy for the time you need?
Do not buy from the refrigerator's running wattage alone. Check startup compatibility, estimate energy over the whole outage, then allow for the station's losses and reserve. A “2 kWh” label describes stored battery energy, not guaranteed energy at the AC socket.
BACKUP-ENERGY TOOL
Replace the example daily energy with your own representative measurement. The starting usable fraction and reserve are adjustable assumptions—not test results for a particular power station. No recharging during the backup period is assumed.
Load energy = daily kWh × 1,000 × backup hours ÷ 24. Nominal capacity = load energy ÷ (usable fraction × unreserved fraction), rounded upward to a whole watt-hour. For the example inputs: 1,200 ÷ (0.80 × 0.80) = 1,875 Wh.
This calculation spreads measured daily energy across the requested duration. Actual consumption may be uneven, especially during short outages, defrost cycles or unusual temperatures. The resulting shortlist checks advertised capacity only. It does not verify compressor startup, running output, voltage, ports, pass-through behavior or appliance compatibility. It is not a design for fixed home wiring or a guarantee for critical equipment.
Using the calculator’s example assumptions of 80% usable energy and a separate 20% reserve, a nominal 1,024 Wh battery provides a planning allowance of about 655 Wh; a 2,048 Wh battery provides about 1,311 Wh. These are calculated allowances, not measured usable capacities.
For the hypothetical refrigerator consuming 1.2 kWh per day, those allowances correspond to about 13.1 and 26.2 hours at the same average energy rate. Actual cycling and startup remain separate checks. A higher daily measurement or additional appliances shorten either estimate.
If the result exceeds the capacity of your shortlist, shorten the planned backup duration, remove optional loads or investigate a larger compatible system. Do not assume solar will cover the shortfall without a realistic daily charging estimate. If startup compatibility is unknown, the capacity result alone is insufficient to choose a model.
Use representative full-day measurements where available. An annual energy label can support an initial estimate by dividing annual kWh by 365, but it does not measure consumption in your kitchen. Never enter the compressor’s watt rating in the daily-kWh field.
Planning examples and editorial guidance updated 24 September 2026. Product-source dates remain as stated; these examples are not hands-on tests.
Suppose your own measurement is 1.2 kWh per day. That is an average energy rate of 50 W. It is not the instantaneous compressor load or the startup requirement. The following are hypothetical planning inputs, not typical refrigerator consumption.
| Backup duration | Load energy | Nominal battery at an assumed 80% usable fraction |
|---|---|---|
| 8 hours | 400 Wh | 500 Wh |
| 12 hours | 600 Wh | 750 Wh |
| 24 hours | 1,200 Wh | 1,500 Wh |
The Home Briefing arithmetic: 1,200 Wh ÷ 24 × hours; then divide by 0.80. The assumed 80% fraction is not a measured result for any model and does not include a separate reserve.
If you also want 20% of the nominal battery capacity held in reserve, the illustrative 24-hour requirement becomes 1,200 ÷ (0.80 × 0.80) = 1,875 Wh. Changing either assumption changes the answer. Compare the resulting requirement with actual test evidence before purchase.
BLUETTI's AC180 product FAQ excludes compressor appliances such as refrigerators from its general runtime formula. This is a useful warning against treating a fixed-load calculation as an appliance test. Read BLUETTI's runtime guidance.
Door openings, room temperature, defrost cycles and additional connected loads can change energy demand. A battery may have enough energy but still fail to support startup; conversely, a high-output inverter can run out of energy quickly.
| Check | Evidence to request |
|---|---|
| Startup | Compatibility with the exact compressor load, not just a headline peak wattage |
| Energy | Relevant runtime test and test conditions |
| Connections | Correct voltage, outlet and cable ratings |
| Recharge plan | A realistic way to recharge between outages or uses |
| Operating limits | Temperature, ventilation and pass-through instructions in the exact manual |
This is a product-selection guide, not an electrical-installation design. Use equipment according to its manufacturer instructions; fixed home-circuit connections require a suitable installation assessed by a qualified electrician.
FROM YOUR MEASUREMENT TO A SHORTLIST
Use the calculator above first. These examples use 80% usable energy and a separate 20% reserve: nominal Wh × 0.80 × 0.80, rounded to a whole Wh. They assume a full battery and no recharging. The allowances are arithmetic, not tested runtime or measured efficiency.
A refrigerator using 1.2 kWh over the planned day needs 1,875 Wh nominal under those assumptions. At 1.8 kWh, the requirement rises to 2,813 Wh. That difference can change the shortlist even when the appliance's running watts are unchanged.
Startup remains a separate check. None of these capacity examples verifies your compressor, wiring or transfer behavior. The Elite 300 manual (pages 20–21) gives separate discharge and bypass limits and warns that motor startup can overload the station.
Affiliate links: The Home Briefing may earn a commission from qualifying purchases at no extra cost to you. These are researched specifications, not hands-on tests or a performance ranking. Confirm current price, selected package and delivery before ordering.
Shorter outage example
1,024 Wh nominal · 1,800 W rated AC
About 655 Wh after the example allowances. That clears the 600 Wh energy budget for 12 hours at 1.2 kWh/day, but not the 1,200 Wh budget for 24 hours.
No solar panel is included. See the profile for the dated offer check.
Read specifications and package notes →
Check BLUETTI Elite 100 V2 ↗Lower daily-energy example
2,073.6 Wh nominal · 2,600 W rated AC
About 1,327 Wh after the example allowances. That clears a 1,200 Wh day, but leaves little room if your measured consumption is higher.
Standalone US unit; solar panels are separate. Compare it with Elite 300 if your measured requirement increases.
Read specifications and package notes →
Check BLUETTI Elite 200 V2 ↗Higher daily-energy example
3,014.4 Wh nominal · 2,400 W rated AC
About 1,929 Wh after the example allowances. That clears an illustrative 1,800 Wh day. Its US bypass limit is 1,800 W, separately from its battery-powered output.
The selected standalone unit was offered for order on 23 October 2026. The separate 200 W panel bundle says dispatch from 29 October; that notice is not shown on the standalone selection.
Read specifications and package notes →
Check BLUETTI Elite 300 ↗Another larger-capacity option
3,168 Wh nominal · 3,200 W rated AC
About 2,028 Wh after the same example allowances. Compare outlet limits, carrying requirements and the complete package before choosing it over a smaller station.
Standalone station; expansion batteries and solar panels are separate. See the profile for the dated offer check.
Read specifications and package notes →
Check ALLPOWERS R3500 ↗About 1,769 Wh after the same allowances: enough for the illustrative 1,200 Wh day, but below the 1,800 Wh day. Its 3,840 W rating does not establish compressor compatibility.
Selected standalone US station, offered for order on 23 October 2026. Confirm current contents, total and delivery.
Read the exact configuration and sources →
Check APEX 300 at BLUETTI ↗Compare Elite 200 V2 with Elite 300 for the energy-versus-output trade-off, or compare Elite 200 V2 with R3500.
Shortlist and arithmetic updated 23 October 2026. Elite 300 and APEX 300 selected offers were checked on that date; other product offer dates remain as stated in their profiles.
Compare APEX 300 with Elite 300 before choosing higher output over more stored energy.
These existing retailer options need the same measured-energy and startup checks. Read the product notes, including retailer specification discrepancies, before choosing a configuration.
Affiliate links: We may earn a commission from qualifying purchases at no extra cost to you. These retailer offers have not been freshly price-checked in this update.
Jackery lists 3,072 Wh and 3,600 W. The retailer summary conflicts with its specification table; confirm the exact US model. The selected base package lists the station and AC cable, without solar panels or transfer equipment.
Read the model and retailer notes →
Check HomePower 3000 at Wellbots ↗The manufacturer lists 5,040 Wh. More nominal capacity does not establish refrigerator runtime or compressor compatibility. Circuit integration and transfer equipment need a separate installation assessment.
Read the model and retailer discrepancies →
Check Explorer 5000 Plus at Wellbots ↗