Size calculator
Edit the watts and hours, add or remove devices. The device's label or manual lists its watts; for fridges, use the average draw, not the compressor's nameplate watts.
Capacity needed (estimate)
2,071 Wh
Output if all run at once
140 W
Size class
Large
1,500–2,999 Wh
1,760 Wh of device use ÷ 0.85 inverter efficiency. Real draw varies: fridges cycle on and off, and motors need a surge above their running watts.
Models that cover it (8 most popular)
| Model | Capacity | Output | Cells | Weight | Wh/lb | Days per charge | Amazon link |
|---|---|---|---|---|---|---|---|
| Jackery Homepower 3600 Plus | 3,584 Wh | 3,600 W | LiFePO4 | 77.2 lb | 46 | 1.7 | Check price on Amazon |
| EcoFlow Delta Pro | 3,600 Wh | 3,600 W | LiFePO4 | 99 lb | 36 | 1.7 | Check price on Amazon |
| Bluetti Elite 200 V2 | 2,080 Wh | 2,600 W | LiFePO4 | 44.5 lb | 47 | 1.0 | Check price on Amazon |
| PECRON F3000 | 3,072 Wh | 3,600 W | LiFePO4 | 63.3 lb | 49 | 1.5 | Check price on Amazon |
| EcoFlow Delta 3 Ultra | 3,072 Wh | 3,600 W | LiFePO4 | 72.1 lb | 43 | 1.5 | Check price on Amazon |
| EcoFlow Delta Pro 3 | 4,096 Wh | 4,000 W | LiFePO4 | 115 lb | 36 | 2.0 | Check price on Amazon |
| Jackery Homepower 3000 | 3,072 Wh | 3,600 W | LiFePO4 | 59.5 lb | 52 | 1.5 | Check price on Amazon |
| Anker SOLIX C1000 (2,112 Wh) | 2,112 Wh | 1,800 W | LiFePO4 | — | — | 1.0 | Check price on Amazon |
The four size classes
How the 218 power stations in our catalog split by capacity. Counts and medians update with the catalog.
| Class | Typical use | Models | Median output | Median weight | Most popular |
|---|---|---|---|---|---|
| Smallunder 500 Wh | phones, laptops, lights, a CPAP for a night or two | 72 | 300 W | 7.7 lb | Jackery Explorer 300 |
| Mid-size500–1,499 Wh | weekend camping, a mini fridge, a work site | 61 | 1,500 W | 25.7 lb | Jackery Explorer 1000 V2 (1,024 Wh) |
| Large1,500–2,999 Wh | RV trips, a full-size fridge for 16–32 hours, power tools | 45 | 2,400 W | 47.1 lb | EcoFlow Delta 3 Max |
| Home backup3,000 Wh and up | outages at home, several appliances, multi-day backup | 40 | 3,600 W | 97 lb | Jackery Homepower 3600 Plus |
Quick reference: 8 hours of one device
Capacity needed to run each device for 8 hours, with the 85% factor. Draws are typical figures; yours may differ.
- Phone charging at 10 W: about 95 Wh (small)
- Laptop at 60 W: about 565 Wh (mid-size)
- CPAP (no humidifier) at 40 W: about 377 Wh (small)
- Mini fridge (average draw) at 60 W: about 565 Wh (mid-size)
- Full-size fridge (700 kWh/yr label) at 80 W: about 753 Wh (mid-size)
- TV at 100 W: about 942 Wh (mid-size)
- Space heater at 1,500 W: about 14,118 Wh (home backup)
A space heater shows why output matters as much as capacity: at 1,500 W it needs a model rated for at least 1,500 W, and it empties even a large battery in hours. For CPAP machines, see our CPAP watt math.