Rich Solar NOVA 6K
#4 in 120 VFull review
For a 120 V off-grid cabin or RV-style system that needs a UL-listed unit with a US support line. Similar hardware sells for much less under other brands.
Rich Solar $1,299.99$1,299.99
The Rich Solar NOVA 6K and the MPP Solar LV6548V 500V are evenly matched, rated 3.3 and 3.3. The Rich Solar NOVA 6K leads on warranty. The MPP Solar LV6548V 500V wins on value. The MPP Solar LV6548V 500V costs $170.99 less ($1,129 vs $1,299.99).
MPP Solar LV6548V 500V
#5 in 120 VFull review
A low-cost 6.5 kW off-grid inverter for big solar arrays on 120 V circuits. Pair two for a 240 V home.
MPP Solar US store $1,129$1,129
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 Rich Solar NOVA 6K for warranty (3-year warranty vs 1-year warranty).
- Choose the MPP Solar LV6548V 500V for value ($174 per kW of continuous output vs $200 per kW of continuous output).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every 120 V hybrid solar inverter; a clear win is highlighted. How we rank explains each one.
| Factor weight | Rich Solar NOVA 6K | MPP Solar LV6548V 500V |
|---|---|---|
| Overall rating | 3.3/5 | 3.3/5 |
| Value 30% | 67 $200 per kW of continuous output | 75 $174 per kW of continuous output |
| Solar input 20% | 54 8,000 W of panels, 550 V max, 2 MPPTs | 54 8,000 W of panels, 500 V max, 2 MPPTs |
| Efficiency 20% | 32 91% peak efficiency | 32 91% peak efficiency |
| Features 15% | 80 UL 1741 listed, Wi-Fi app, parallel stacking, battery communication; no grid sell-back | 75 UL 1741 listed, Wi-Fi app, parallel stacking, battery communication; no grid sell-back |
| Warranty 15% | 22 3-year warranty | 0 1-year warranty |
Specifications
| Rich Solar NOVA 6K | MPP Solar LV6548V 500V | |
|---|---|---|
| Output | ||
| Output voltage | 120 V single-phase | 120 V single-phase |
| Continuous output | 6,500 W | 6,500 W |
| Surge | 13,000 W | 13,000 W |
| Peak efficiency | 91% | 91% |
| Transfer time | 10 ms | 10 ms |
| Parallel units | Up to 6 units | Up to 6 units |
| Solar | ||
| Max PV power | 8,000 W | 8,000 W |
| Max PV voltage (Voc) | 550 V | 500 V |
| MPPT range | 90 to 450 V | 90 to 450 V |
| MPPT trackers | 2 | 2 |
| PV current per tracker | 18 A | 18 A |
| Runs without battery | - | Yes |
| Battery and grid | ||
| Battery voltage | 48 V | 48 V |
| Battery types | Lithium, AGM, gel, flooded | Lithium, lead-acid |
| Max charge current | 120 A | 120 A |
| AC charge current | 120 A | 120 A |
| Battery communication | Yes | Yes |
| Grid sell-back | No | No |
| Generator input | - | No |
| UL 1741 | Yes | Yes |
| Build | ||
| App monitoring | Included | Included |
| Dimensions | 147.4 x 432.5 x 575.6 mm | 147.4 x 432.5 x 553.6 mm |
| Weight | 40.6 lb | 40.6 lb |
| Warranty | 3 years | 1 year |
| Released | 2024-09 | 2020-10 |