Victron MultiPlus-II 12/4k 2x120V
The biggest 12 V MultiPlus-II, for 50 A motorhomes with large lithium banks that want air conditioning off-grid. Confirm the listing your installer needs, since no UL certificate is published.
DRSA $1,190$1,190
The Victron MultiPlus-II 12/4k 2x120V is the better 12V inverter overall, rated 4.0 to 3.6. The Victron MultiPlus-II 12/4k 2x120V leads on efficiency. The Rich Solar NOVA SUPERCHARGER 3K 12V wins on value. The Rich Solar NOVA SUPERCHARGER 3K 12V costs $390.01 less ($799.99 vs $1,190).
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
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 Victron MultiPlus-II 12/4k 2x120V for efficiency (93% peak efficiency (maker rating) vs 91% peak efficiency (maker rating)).
- Choose the Rich Solar NOVA SUPERCHARGER 3K 12V for value ($0.27 per continuous watt vs $0.35 per continuous watt).
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 | Victron MultiPlus-II 12/4k 2x120V | Rich Solar NOVA SUPERCHARGER 3K 12V |
|---|---|---|
| Overall rating | 4.0/5 | 3.6/5 |
| Value 30% | 87 $0.35 per continuous watt | 98 $0.27 per continuous watt |
| Idle draw 15% | 73 1.5 A idle (about 18 W) with nothing plugged in | 50 idle draw not published (neutral score used) |
| Safety listing 15% | 0 no UL 458 or UL 1741 listing stated | 0 no UL 458 or UL 1741 listing stated |
| Warranty 15% | 100 5-year warranty | 50 warranty not published (neutral score used) |
| 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% | 89 93% peak efficiency (maker rating) | 67 91% peak efficiency (maker rating) |
Specifications
| Victron MultiPlus-II 12/4k 2x120V | Rich Solar NOVA SUPERCHARGER 3K 12V | |
|---|---|---|
| Output | ||
| Type | Pure sine wave inverter-charger | Pure sine wave inverter-charger |
| Continuous power | 3,400 W | 3,000 W |
| Surge power | 6,000 W for 2 s | 6,000 W for 5 s |
| DC input range | 9.5 to 17 V | 10.5 to 18 V |
| Idle draw | 1.5 A (18 W) | - |
| Power-saving draw | 0.3 A | - |
| Peak efficiency | 93% | 91% |
| Connections | ||
| AC outlets | 0 | - |
| GFCI outlets | No | No |
| Hardwire terminal | Yes | Yes |
| USB ports | None | - |
| Transfer switch | Yes | Yes |
| Charger | 160 A | 150 A |
| Lithium charge profile | Yes | Yes |
| Parallel units | Yes | - |
| Control and build | ||
| Remote | Optional extra | Optional extra |
| App | Optional add-on | Optional add-on |
| Display | No | No |
| Safety listing | No | No |
| Cooling | fan | - |
| Dimensions | 650 x 275 x 165 mm (25.6 x 11 x 6.5 in) | 15.4 x 12.0 x 4.8 in |
| Weight | 55 lb | 18.5 lb |
| Warranty | 5 years | - |