For home-backup buyers who want large tested capacity at a lower price per watt-hour than most 3 kWh-plus units.
Amazon $1,709 Jackery $1,899 Outbound Power
A 3.7 kWh home backup station for buyers who want 240V from one unit and the option to grow toward whole-home backup. At the Amazon price it is one of the cheaper ways to get that much LiFePO4 capacity.
- 3,686 WhCapacity
- 3,600 WAC output
- 99 lbWeight
- LiFePO4Battery
- 3 hFull charge
- $0.33Price / Wh
Price checked October 20, 2026. As an Amazon Associate we earn from qualifying purchases.
- A 240V outlet on a single unit runs a well pump or other 240V load up to 2,200W
- Two units pair into 120/240V split phase for whole-home backup
- 2,000W of solar input refills the battery in about 2.5 hours of strong sun
- Four 100W USB-C ports charge several laptops at once
- About 99 lb, so it moves on its wheels and stays put most of the time
- Full recharge from a standard 120V outlet takes about 3 hours
- No independent capacity test published yet
How it scores
The rating comes from 8 measured or published factors, each scored 0-100 against fixed reference points for its size. How we rank explains each one.
Specifications
| Battery | |
|---|---|
| Rated capacity | 3,686 Wh |
| Chemistry | LiFePO4 |
| Cycle life | 4,000 4000+ cycles; end-of-life capacity not stated |
| Expandable | Yes |
| Output | |
| AC output | 3,600 W |
| Boost mode (resistive loads) | 4,500 W |
| AC outlets | 6 total |
| 120V 20A outlets (NEMA 5-20R) | 4 |
| RV 30A outlet (TT-30R) | 1 |
| 240V 20A outlet (NEMA 6-20R) | 1 |
| USB-C ports | 4 (up to 100 W each) |
| USB-A ports | 2 |
| 12 V car outlet | Yes |
| DC5521 ports | 2 |
| UPS / pass-through | Yes (20 ms switchover) |
| Charging | |
| AC charging | 1,800 W |
| Full AC charge time | 3 h (About 3 h from 120V at 1800W, or 1.5 h from 240V at 3600W (manufacturer)) |
| Max solar input | 2,000 W |
| Solar input voltage | 12-60V |
| Build | |
| Weight | 99 lb (45 kg) |
| Dimensions | 20.4 x 12.3 x 16.5 in |
| App | myGro app (Wi-Fi and Bluetooth) |
| Warranty | 5 years |
Alternatives in this size
For RV owners and home-backup buyers who want 3 kWh and 3000W at a low price in a fixed-size unit. Buyers who may want to add batteries or 240V later should look at expandable models.
Amazon $1,069 Dabbsson $999For RV owners and home-backup buyers who want 3 kWh and a TT-30 outlet at a low price and can lift a 58 lb box.
Amazon $1,199 BLUETTI $1,199Compare
Compare the Growatt HELIOS 3600 with any other portable power station →
More from Growatt: every Growatt product ranked.