Growatt SPE 6000 US
For off-grid homes and cabins that want 6 kW of 240 V with a large solar input at a low price. A strong rival to the EG4 6000XP.
Amazon$1,399
The Growatt SPE 6000 US is the better hybrid solar inverter overall, rated 4.1 to 3.7. The Growatt SPE 6000 US leads on warranty. The ECO-WORTHY Liber 6kP costs $609.01 less ($789.99 vs $1,399).
ECO-WORTHY Liber 6kP
For off-grid cabins and small homes that need 240 V loads on a budget. One unit covers a modest house and more can be added later.
Amazon ECO-WORTHY $789.99$789.99
Prices were last checked October 23, 2026 and are subject to change; the price and availability shown by the retailer at the time of purchase apply.
Which should you buy?
- Choose the Growatt SPE 6000 US for warranty (5-year warranty vs 2-year warranty).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every 120/240 V split-phase hybrid solar inverter; a clear win is highlighted. How we rank explains each one.
| Factor weight | Growatt SPE 6000 US | ECO-WORTHY Liber 6kP |
|---|---|---|
| Overall rating | 4.1/5 | 3.7/5 |
| Value 30% | 93 $233 per kW of continuous output | 100 $132 per kW of continuous output |
| Solar input 20% | 68 9,000 W of panels, 550 V max, 2 MPPTs | 60 9,000 W of panels, 500 V max, 1 MPPT |
| Efficiency 20% | 67 95% peak efficiency, 75 W idle | 45 93% peak efficiency |
| Features 15% | 82 UL 1741 listed, Wi-Fi add-on, parallel stacking, generator input, battery communication | 75 UL 1741 listed, Wi-Fi app, parallel stacking, battery communication; no grid sell-back |
| Warranty 15% | 44 5-year warranty | 11 2-year warranty |
Specifications
| Growatt SPE 6000 US | ECO-WORTHY Liber 6kP | |
|---|---|---|
| Output | ||
| Output voltage | 120/240 V split-phase | 120/240 V split-phase |
| Continuous output | 6,000 W | 6,000 W |
| Surge | - | 12,000 W |
| Peak efficiency | 95% | 93% |
| CEC efficiency | 94.5% | - |
| Idle draw | 75 W | - |
| Transfer time | 20 ms | 10 ms |
| Parallel units | Up to 9 units | Up to 6 units |
| Solar | ||
| Max PV power | 9,000 W | 9,000 W |
| Max PV voltage (Voc) | 550 V | 500 V |
| MPPT range | 60 to 480 V | 125 to 425 V |
| MPPT trackers | 2 | 1 |
| PV current per tracker | 22 A | 27 A |
| Runs without battery | Yes | - |
| Battery and grid | ||
| Battery voltage | 48 V | 48 V |
| Battery types | Lithium, lead-acid | Lithium-ion, lead-acid, user-defined |
| Max charge current | 140 A | 120 A |
| AC charge current | 140 A | 100 A |
| Battery communication | Yes | Yes |
| Grid sell-back | - | No |
| Generator input | Yes | No |
| UL 1741 | Yes | Yes |
| Build | ||
| App monitoring | Optional add-on | Included |
| Enclosure | IP20 | IP20 |
| Dimensions | 550 x 465 x 150 mm | 472 x 412 x 130 mm |
| Weight | 47.4 lb | 35.3 lb |
| Warranty | 5 years | 2 years |
| Released | 2025-09 | 2026-02 |