PowMr POW-LVM6K-SP
For budget off-grid builds that need 240 V from a single box. The high idle draw and short warranty are the price of the low cost.
PowMr $549$549
The PowMr POW-LVM6K-SP rates 3.6 among 120/240 V split-phase hybrid solar inverters; the PowMr POW-LVM4K-ECO rates 3.4 among 120 V ones. The PowMr POW-LVM4K-ECO costs $260 less ($289 vs $549).
PowMr POW-LVM4K-ECO
#1 in 120 VFull review
For a small 120 V cabin, shed or van system on a 24 V battery at the lowest price. Buyers who want published efficiency and a UL listing should spend more.
Amazon PowMr $289$289
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.
Scores side by side
These two sit in different output classes (120/240 V split-phase and 120 V), and each is scored against the reference points for its own class, so a rating says how well each does among its own output peers. How we rank explains each factor.
| Factor weight | PowMr POW-LVM6K-SP | PowMr POW-LVM4K-ECO |
|---|---|---|
| Overall rating | 3.6/5 | 3.4/5 |
| Value 30% | 100 $92 per kW of continuous output | 100 $72 per kW of continuous output |
| Solar input 20% | 68 9,000 W of panels, 500 V max, 2 MPPTs | 55 5,000 W of panels, 500 V max |
| Efficiency 20% | 61 94% peak efficiency, 75 W idle | 50 efficiency and idle draw not published (neutral score used) |
| Features 15% | 35 Wi-Fi app, battery communication; not UL 1741 listed | 20 Wi-Fi add-on; not UL 1741 listed |
| Warranty 15% | 0 1-year warranty | 0 1-year warranty |
Specifications
| PowMr POW-LVM6K-SP | PowMr POW-LVM4K-ECO | |
|---|---|---|
| Output | ||
| Output voltage | 120/240 V split-phase | 120 V single-phase |
| Continuous output | 6,000 W | 4,000 W |
| Surge | 12,000 W | - |
| Peak efficiency | 94% | - |
| Idle draw | 75 W | - |
| Transfer time | 10 ms | - |
| Parallel units | No | No |
| Solar | ||
| Max PV power | 9,000 W | 5,000 W |
| Max PV voltage (Voc) | 500 V | 500 V |
| MPPT range | 80 to 450 V | 60 to 450 V |
| MPPT trackers | 2 | - |
| PV current per tracker | 18 A | - |
| Runs without battery | Yes | Yes |
| Battery and grid | ||
| Battery voltage | 48 V | 24 V |
| Battery types | Lithium, lead-acid, user-defined | Lithium, lead-acid, user-defined |
| Max charge current | 125 A | - |
| AC charge current | 100 A | 100 A |
| Battery communication | Yes | - |
| Grid sell-back | No | No |
| UL 1741 | No | No |
| Build | ||
| App monitoring | Included | Optional add-on |
| Warranty | 1 year | 1 year |