The Victron MultiPlus-II 48/5000 120V is the better 48V inverter overall, rated 4.4 to 3.8. The Victron MultiPlus-II 48/5000 120V leads on value, idle draw and efficiency. The Victron MultiPlus-II 48/5000 120V costs $831.68 less ($1,307.32 vs $2,139).
A strong 48 V inverter-charger for an off-grid home or whole-house backup on 120 V. It handles big loads, charges fast from a generator, and carries the certifications inspectors ask for.
Amazon Northern Arizona Wind & Sun $1,307.32For a cabin or off-grid home built around 120 V loads, with room to stack a second unit later. Rugged and code-friendly, but it idles high for its size.
Amazon $2,139Prices 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.
Each factor is scored 0-100 against the same fixed reference points for every 120V inverter-chargers 48V inverter; a clear win is highlighted. How we rank explains each one.
| Factor weight | Victron MultiPlus-II 48/5000 120V | OutBack VFXR3648A |
|---|---|---|
| Overall rating | 4.4/5 | 3.8/5 |
| Value 30% | 73 $0.33 per continuous watt | 32 $0.59 per continuous watt |
| Idle draw 15% | 93 15 W idle with nothing plugged in | 66 34 W idle with nothing plugged in |
| Safety listing 15% | 100 LabTest certified to UL 1741 and CSA C22.2 No. 107.1 (LC22395-1) and to UL 458 (LC26-6384-1) | 100 ETL listed to UL 1741 (2nd Ed. with supplement SA) |
| Warranty 15% | 100 5-year warranty | 100 5-year warranty |
| Features 15% | 50 optional remote, app add-on, lithium charge profile, hardwire terminal | 50 optional remote, app add-on, lithium charge profile, hardwire terminal |
| Efficiency 10% | 100 96% peak efficiency (maker rating) | 89 93% peak efficiency (maker rating) |
| Victron MultiPlus-II 48/5000 120V | OutBack VFXR3648A | |
|---|---|---|
| Output | ||
| Type | Pure sine wave inverter-charger | Pure sine wave inverter-charger |
| AC output | 120 V | 120 V |
| Continuous power | 4,000 W | 3,600 W |
| Surge power | 9,000 W | 5,400 W for 5 s |
| DC input range | 38 to 66 V | 42 to 68 V |
| Idle draw | 15 W (0.3 A at 48 V) | 34 W (0.7 A at 48 V) |
| Power-saving draw | 3 W | 9 W |
| Peak efficiency | 96% | 93% |
| Connections | ||
| AC outlets | 0 | 0 |
| GFCI outlets | No | No |
| Hardwire terminal | Yes | Yes |
| USB ports | None | None |
| Transfer switch | Yes | Yes |
| Pass-through rating | 95 A | 60 A |
| Charger | 70 A | 45 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 | LabTest certified to UL 1741 and CSA C22.2 No. 107.1 (LC22395-1) and to UL 458 (LC26-6384-1) | ETL listed to UL 1741 (2nd Ed. with supplement SA) |
| Design | - | Low-frequency (transformer) |
| Cooling | fan | fan |
| Dimensions | 676 x 330 x 164 mm (26.6 x 13.0 x 6.5 in) | 12 x 8.25 x 16.25 in (30 x 21 x 41 cm) |
| Weight | 71 lb | 61 lb |
| Warranty | 5 years | 5 years |
