The EcoFlow DELTA 3 Classic is the better portable power station overall, rated 4.2 to 3.1. The EcoFlow DELTA 3 Classic leads on value, battery life and features. The EcoFlow DELTA 3 Classic costs $400.99 less ($499 vs $899.99).
A low-cost 1kWh LiFePO4 station for home backup and car camping where AC outlets are all you need. Pick the DELTA 3 Plus instead if you want 12V outputs, faster solar charging or an extra battery later.
Amazon $499For buyers who want a Generac-backed 1 kWh station that can run 1,600W appliances and parallel with a second unit; LiFePO4 rivals offer more cycles and faster charging for the money.
ecobee (Generac) $899.99Prices were last checked October 24, 2026 and are subject to change; the price and availability shown by the retailer at the time of purchase apply.
Each factor is scored 0-100 against the same fixed reference points for every mid-size portable power station; a clear win is highlighted. How we rank explains each one.
| Factor weight | EcoFlow DELTA 3 Classic | Generac GB1000 |
|---|---|---|
| Overall rating | 4.2/5 | 3.1/5 |
| Value 25% | 82 $0.49 per rated Wh | 36 $0.83 per rated Wh |
| Tested capacity 15% | 81 88% of rated capacity delivered (2 tests) | 50 not yet independently tested (neutral score used) |
| Battery life 15% | 70 LiFePO4, 5-year warranty | 23 Li-ion NMC, 800 cycles, 3-year warranty |
| AC output 15% | 82 1,800 W continuous AC | 74 1,600 W continuous AC |
| Charging speed 10% | 95 0-100% on AC in 1 h | 50 full AC charge time not published (neutral score used) |
| Portability 10% | 72 85 Wh per kg (26.7 lb (12.1 kg)) | 68 83 Wh per kg (29 lb (13.2 kg)) |
| Solar input 5% | 40 500 W max solar input | 33 468 W max solar input |
| Features 5% | 75 UPS (10 ms), 100 W USB-C, app | 0 no UPS, expansion or app |
| Tested by | Usable AC energy | Of rated | Conditions |
|---|---|---|---|
| CNET | 947 Wh | 92.5% | 480W load logged with HOBOware; round-trip efficiency 81.34%; recharge from empty 55 min. |
| The Solar Lab | - | 83% | Inverter efficiency test (load not stated in the review). Measured AC recharge from empty just under 55 min. |
No independent test published yet.
| EcoFlow DELTA 3 Classic | Generac GB1000 | |
|---|---|---|
| Battery | ||
| Rated capacity | 1,024 Wh | 1,086 Wh |
| Tested usable capacity | 899 Wh (88%) | - |
| Chemistry | LiFePO4 | Li-ion NMC |
| Cycle life | - | 800 to 80% (0.5C charge, 1C discharge at 25 C) |
| Expandable | No | No |
| Output | ||
| AC output | 1,800 W (3,600 W surge) | 1,600 W (3,200 W surge) |
| Boost mode (resistive loads) | 2,600 W | - |
| AC outlets | 3 total | 3 total |
| 120V 20A outlets (NEMA 5-20R) | 2 | - |
| 120V 2-prong outlets (NEMA 1-15R) | 1 | 3 |
| AC waveform | Pure sine wave | - |
| USB-C ports | 2 (up to 100 W each) | 2 (up to 65 W each) |
| USB-A ports | 1 | 2 |
| 12 V car outlet | No | Yes |
| DC5521 ports | 0 | 0 |
| UPS / pass-through | Yes (10 ms switchover) | No |
| Charging | ||
| AC charging | 1,400 W | 450 W |
| Full AC charge time | 1 h (0-80% in 45 min) | - |
| Max solar input | 500 W | 468 W |
| Solar input voltage | - | 10-28V, 30A max (shared DC/solar input) |
| Car charging | 96 W | - |
| Build | ||
| Weight | 26.7 lb (12.1 kg) | 29 lb (13.2 kg) |
| Dimensions | 398 x 200 x 283 mm | 14.1 x 10.2 x 12.0 in |
| App | EcoFlow app (Wi-Fi and Bluetooth) | - |
| Warranty | 5 years | 3 years |
| Released | 2025-09 | 2022-09 |
