Growatt SPE 12000 US
For off-grid homes that need whole-house 240 V power and a big solar array at a very low price per kW.
Self2Solar $1,769$1,769
The Growatt SPE 12000 US and the EG4 12000XP are evenly matched, rated 4.2 and 4.1. The Growatt SPE 12000 US leads on efficiency. The EG4 12000XP wins on solar input. The Growatt SPE 12000 US costs $330.99 less ($1,769 vs $2,099.99).
EG4 12000XP
For off-grid homes that need whole-house 240 V power and a big solar array at a low price per kW. Grid-tied owners who want to sell power should look at a hybrid instead.
Signature Solar $2,099.99 Shop Solar Kits $2,099.99$2,099.99
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 12000 US for efficiency (95% peak efficiency, 75 W idle vs 90.2% peak efficiency, 70 W idle).
- Choose the EG4 12000XP for solar input (24,000 W of panels, 500 V max, 2 MPPTs vs 18,000 W of panels, 550 V max, 2 MPPTs).
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 12000 US | EG4 12000XP |
|---|---|---|
| Overall rating | 4.2/5 | 4.1/5 |
| Value 30% | 100 $147 per kW of continuous output | 100 $175 per kW of continuous output |
| Solar input 20% | 68 18,000 W of panels, 550 V max, 2 MPPTs | 92 24,000 W of panels, 500 V max, 2 MPPTs |
| Efficiency 20% | 67 95% peak efficiency, 75 W idle | 38 90.2% peak efficiency, 70 W idle |
| Features 15% | 82 UL 1741 listed, Wi-Fi add-on, parallel stacking, generator input, battery communication | 85 UL 1741 listed, Wi-Fi app, parallel stacking, generator input, battery communication; no grid sell-back |
| Warranty 15% | 44 5-year warranty | 44 5-year warranty |
Specifications
| Growatt SPE 12000 US | EG4 12000XP | |
|---|---|---|
| Output | ||
| Output voltage | 120/240 V split-phase | 120/240 V split-phase |
| Continuous output | 12,000 W | 12,000 W |
| Surge | - | 15,360 W |
| Peak efficiency | 95% | 90.2% |
| CEC efficiency | 94.5% | - |
| Idle draw | 75 W | 70 W |
| Transfer time | 20 ms | 10 ms |
| Parallel units | Up to 9 units | Up to 16 units |
| Solar | ||
| Max PV power | 18,000 W | 24,000 W |
| Max PV voltage (Voc) | 550 V | 500 V |
| MPPT range | 60 to 480 V | 120 to 385 V |
| MPPT trackers | 2 | 2 |
| PV current per tracker | 27 A | 35 A |
| Runs without battery | Yes | Yes |
| Battery and grid | ||
| Battery voltage | 48 V | 48 V |
| Battery types | Lithium, lead-acid | Lithium, lead-acid |
| Max charge current | 250 A | 250 A |
| AC charge current | 250 A | - |
| Battery communication | Yes | Yes |
| Grid sell-back | - | No |
| Generator input | Yes | Yes |
| UL 1741 | Yes | Yes |
| Build | ||
| App monitoring | Optional add-on | Included |
| Enclosure | IP20 | IP20 |
| Dimensions | 550 x 465 x 150 mm | 34.25 x 20.87 x 5.91 in |
| Weight | 47.4 lb | 104.7 lb |
| Warranty | 5 years | 5 years |
| Released | 2025-09 | 2024-11 |