Rich Solar NOVA SUPERCHARGER 3K 12V
#16 in Inverter-chargersFull review
For larger RVs and boats that want 3000 W of AC and a fast shore-power charger in one box.
Rich Solar $799.99$799.99
The Rich Solar NOVA SUPERCHARGER 3K 12V is the better 12V inverter overall, rated 3.6 to 3.5. The Rich Solar NOVA SUPERCHARGER 3K 12V leads on efficiency. The Magnum Energy MS2812 wins on safety listing.
Magnum Energy MS2812
#22 in Inverter-chargersFull review
For full-time RVers who want a rugged low-frequency inverter-charger that will start air conditioners and charge fast from a generator.
Prices were last checked October 24, 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 SUPERCHARGER 3K 12V for efficiency (91% peak efficiency (maker rating) vs 90% peak efficiency (maker rating)).
- Choose the Magnum Energy MS2812 for safety listing (ETL listed to UL/cUL 458, CSA C22.2 No. 107.1-01; meets KKK-A-1822E vs no UL 458 or UL 1741 listing stated).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every inverter-chargers 12V inverter; a clear win is highlighted. How we rank explains each one.
| Factor weight | Rich Solar NOVA SUPERCHARGER 3K 12V | Magnum Energy MS2812 |
|---|---|---|
| Overall rating | 3.6/5 | 3.5/5 |
| Value 30% | 98 $0.27 per continuous watt | 50 no current price (neutral score used) |
| Idle draw 15% | 50 idle draw not published (neutral score used) | 33 2.5 A idle (about 30 W) with nothing plugged in |
| Safety listing 15% | 0 no UL 458 or UL 1741 listing stated | 100 ETL listed to UL/cUL 458, CSA C22.2 No. 107.1-01; meets KKK-A-1822E |
| Warranty 15% | 50 warranty not published (neutral score used) | 50 3-year warranty |
| Features 15% | 65 optional remote, app add-on, lithium charge profile, hardwire terminal | 65 optional remote, app add-on, lithium charge profile, hardwire terminal |
| Efficiency 10% | 67 91% peak efficiency (maker rating) | 56 90% peak efficiency (maker rating) |
Specifications
| Rich Solar NOVA SUPERCHARGER 3K 12V | Magnum Energy MS2812 | |
|---|---|---|
| Output | ||
| Type | Pure sine wave inverter-charger | Pure sine wave inverter-charger |
| Continuous power | 3,000 W | 2,800 W |
| Surge power | 6,000 W for 5 s | 3,900 W for 5 s |
| DC input range | 10.5 to 18 V | 9 to 16.8 V |
| Idle draw | - | 2.5 A (30 W) |
| Power-saving draw | - | 0.7 A |
| Peak efficiency | 91% | 90% |
| Connections | ||
| AC outlets | - | 0 |
| GFCI outlets | No | No |
| Hardwire terminal | Yes | Yes |
| USB ports | - | None |
| Transfer switch | Yes | Yes |
| Charger | 150 A | 125 A |
| Lithium charge profile | Yes | Yes |
| Parallel units | - | No |
| Control and build | ||
| Remote | Optional extra | Optional extra |
| App | Optional add-on | Optional add-on |
| Display | No | No |
| Safety listing | No | ETL listed to UL/cUL 458, CSA C22.2 No. 107.1-01; meets KKK-A-1822E |
| Cooling | - | fan |
| Dimensions | 15.4 x 12.0 x 4.8 in | 13.75 x 12.65 x 8.0 in (34.9 x 32.1 x 20.3 cm) |
| Weight | 18.5 lb | 55 lb |
| Warranty | - | 3 years |