Victron MultiPlus-II 12/4k 120V
For big 12 V lithium builds that want to run an air conditioner without moving to 24 or 48 V. Check that your inspector accepts it before buying, since no UL certificate is published.
DRSA $1,105$1,105
The Victron MultiPlus-II 12/4k 120V and the Victron MultiPlus-II 12/4k 2x120V are evenly matched, rated 4.0 and 4.0. The Victron MultiPlus-II 12/4k 120V costs $85 less ($1,105 vs $1,190).
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
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.
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 120V | Victron MultiPlus-II 12/4k 2x120V |
|---|---|---|
| Overall rating | 4.0/5 | 4.0/5 |
| Value 30% | 90 $0.33 per continuous watt | 87 $0.35 per continuous watt |
| Idle draw 15% | 73 1.5 A idle (about 18 W) with nothing plugged in | 73 1.5 A idle (about 18 W) with nothing plugged in |
| 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 | 100 5-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% | 89 93% peak efficiency (maker rating) | 89 93% peak efficiency (maker rating) |
Specifications
| Victron MultiPlus-II 12/4k 120V | Victron MultiPlus-II 12/4k 2x120V | |
|---|---|---|
| Output | ||
| Type | Pure sine wave inverter-charger | Pure sine wave inverter-charger |
| Continuous power | 3,400 W | 3,400 W |
| Surge power | 6,000 W for 2 s | 6,000 W for 2 s |
| DC input range | 9.5 to 17 V | 9.5 to 17 V |
| Idle draw | 1.5 A (18 W) | 1.5 A (18 W) |
| Power-saving draw | 0.3 A | 0.3 A |
| Peak efficiency | 93% | 93% |
| Connections | ||
| AC outlets | 0 | 0 |
| GFCI outlets | No | No |
| Hardwire terminal | Yes | Yes |
| USB ports | None | None |
| Transfer switch | Yes | Yes |
| Charger | 160 A | 160 A |
| Lithium charge profile | Yes | Yes |
| Parallel units | Yes | 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 | fan |
| Dimensions | 631 x 277 x 164 mm (24.8 x 10.9 x 6.5 in) | 650 x 275 x 165 mm (25.6 x 11 x 6.5 in) |
| Weight | 49 lb | 55 lb |
| Warranty | 5 years | 5 years |