Victron MultiPlus 12/1200 120V
A compact all-in-one for small RVs and boats that want a coffee maker on battery and fast charging on shore power. Larger rigs on 30 A service should look at the 2000 VA models.
Amazon DRSA $487.05$487.05
The Victron MultiPlus 12/1200 120V rates 3.9 among inverter-chargers 12V inverters; the Go Power! GP-ISW1000 rates 2.5 among up to 1,000 W ones. The Go Power! GP-ISW1000 costs $119.15 less ($367.90 vs $487.05).
Go Power! GP-ISW1000
#25 in Up to 1,000 WFull review
For vans and small RVs that run a small microwave or coffee maker and want low idle draw.
Amazon $367.90$367.90
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
These two sit in different size classes (inverter-chargers and up to 1,000 W), and each is scored against the reference points for its own class, so a rating says how well each does among its own size peers. How we rank explains each factor.
| Factor weight | Victron MultiPlus 12/1200 120V | Go Power! GP-ISW1000 |
|---|---|---|
| Overall rating | 3.9/5 | 2.5/5 |
| Value 30% | 68 $0.49 per continuous watt | 48 $0.37 per continuous watt |
| Idle draw 15% | 90 1.1 A idle (about 13 W) with nothing plugged in | 0 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 | 25 2-year warranty |
| Features 15% | 65 optional remote, app add-on, lithium charge profile, hardwire terminal | 12 optional remote; no app |
| Efficiency 10% | 89 93% peak efficiency (maker rating) | 78 92% peak efficiency (maker rating) |
Specifications
| Victron MultiPlus 12/1200 120V | Go Power! GP-ISW1000 | |
|---|---|---|
| Output | ||
| Type | Pure sine wave inverter-charger | Pure sine wave inverter |
| Continuous power | 1,000 W | 1,000 W |
| Surge power | 2,400 W | 1,750 W |
| DC input range | 9.5 to 17 V | 10.5 to 16.5 V |
| Idle draw | 1.1 A (13 W) | 1.5 A (18 W) |
| Power-saving draw | 0.3 A | 0.1 A |
| Peak efficiency | 93% | 92% |
| Connections | ||
| AC outlets | 0 | 2 |
| GFCI outlets | No | Yes |
| Hardwire terminal | Yes | No |
| USB ports | None | None |
| Transfer switch | Yes | No |
| Charger | 50 A | - |
| Lithium charge profile | Yes | - |
| Parallel units | Yes | No |
| Control and build | ||
| Remote | Optional extra | Optional extra |
| App | Optional add-on | No |
| Display | No | No |
| Safety listing | No | No |
| Cooling | fan | load-controlled fan |
| Dimensions | 406 x 250 x 100 mm (15.98 x 9.84 x 3.94 in) | 372 x 200 x 83 mm (14.65 x 7.87 x 3.27 in) |
| Weight | 18.1 lb | 7.2 lb |
| Warranty | 5 years | 2 years |