Victron MultiPlus-II 12/3000 120V
The default 3,000 VA inverter-charger for a 12 V RV or boat on 30 A shore power. It costs less and idles lower than the original MultiPlus 12/3000.
Amazon DRSA $1,006.40$1,006.40
The Victron MultiPlus-II 12/3000 120V is the better 12V inverter overall, rated 4.5 to 3.5. The Victron MultiPlus-II 12/3000 120V leads on idle draw, warranty and efficiency.
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 Victron MultiPlus-II 12/3000 120V for idle draw (1.1 A idle (about 13 W) with nothing plugged in vs 2.5 A idle (about 30 W) with nothing plugged in), warranty (5-year warranty vs 3-year warranty) and efficiency (93% peak efficiency (maker rating) vs 90% peak efficiency (maker rating)).
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 12/3000 120V | Magnum Energy MS2812 |
|---|---|---|
| Overall rating | 4.5/5 | 3.5/5 |
| Value 30% | 77 $0.42 per continuous watt | 50 no current price (neutral score used) |
| Idle draw 15% | 90 1.1 A idle (about 13 W) with nothing plugged in | 33 2.5 A idle (about 30 W) with nothing plugged in |
| Safety listing 15% | 100 LabTest certified to UL 458 (certificate LC20469-3) | 100 ETL listed to UL/cUL 458, CSA C22.2 No. 107.1-01; meets KKK-A-1822E |
| Warranty 15% | 100 5-year warranty | 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% | 89 93% peak efficiency (maker rating) | 56 90% peak efficiency (maker rating) |
Specifications
| Victron MultiPlus-II 12/3000 120V | Magnum Energy MS2812 | |
|---|---|---|
| Output | ||
| Type | Pure sine wave inverter-charger | Pure sine wave inverter-charger |
| Continuous power | 2,400 W | 2,800 W |
| Surge power | 5,500 W | 3,900 W for 5 s |
| DC input range | 9.5 to 17 V | 9 to 16.8 V |
| Idle draw | 1.1 A (13 W) | 2.5 A (30 W) |
| Power-saving draw | 0.2 A | 0.7 A |
| Peak efficiency | 93% | 90% |
| Connections | ||
| AC outlets | 0 | 0 |
| GFCI outlets | No | No |
| Hardwire terminal | Yes | Yes |
| USB ports | None | None |
| Transfer switch | Yes | Yes |
| Charger | 120 A | 125 A |
| Lithium charge profile | Yes | Yes |
| Parallel units | Yes | No |
| Control and build | ||
| Remote | Optional extra | Optional extra |
| App | Optional add-on | Optional add-on |
| Display | No | No |
| Safety listing | LabTest certified to UL 458 (certificate LC20469-3) | ETL listed to UL/cUL 458, CSA C22.2 No. 107.1-01; meets KKK-A-1822E |
| Cooling | fan | fan |
| Dimensions | 578 x 277 x 148 mm (22.8 x 10.9 x 5.8 in) | 13.75 x 12.65 x 8.0 in (34.9 x 32.1 x 20.3 cm) |
| Weight | 42 lb | 55 lb |
| Warranty | 5 years | 3 years |