For a dusty, humid or coastal off-grid site where a sealed inverter earns its keep. Built to last, but it costs more and idles higher than newer designs.
Price checked October 24, 2026. As an Amazon Associate we earn from qualifying purchases.
Every OutBack FXR A-Series model we rank, smallest first. Ratings compare each against its own size.
| Model | Continuous | Rating | Price |
|---|---|---|---|
| OutBack FXR3048A (this one) | 3,000 W | 3.5/5 | $2,314 |
| OutBack VFXR3648A | 3,600 W | 3.8/5 | $2,139 |
The rating comes from 6 measured or published factors, each scored 0-100 against fixed reference points for its size. How we rank explains each one.
| Model number | FXR3048A-01 |
|---|---|
| Output | |
| Type | Pure sine wave inverter-charger |
| AC output | 120 V |
| Continuous power | 3,000 W |
| Surge power | 5,400 W for 5 s |
| DC input range | 42 to 68 V |
| Idle draw | 34 W (0.7 A at 48 V) |
| Power-saving draw | 9 W |
| Peak efficiency | 93% |
| Connections | |
| AC outlets | 0 |
| GFCI outlets | No |
| Hardwire terminal | Yes |
| USB ports | None |
| Transfer switch | Yes |
| Pass-through rating | 60 A |
| Charger | 35 A |
| Lithium charge profile | Yes |
| Parallel units | Yes |
| Control and build | |
| Remote | Optional extra |
| App | Optional add-on |
| Display | No |
| Safety listing | ETL listed to UL 1741 (2nd Ed. with supplement SA) |
| Design | Low-frequency (transformer) |
| Cooling | fan |
| Dimensions | 13 x 8.25 x 16.25 in (33 x 21 x 41 cm) |
| Weight | 62 lb |
| Warranty | 5 years |
For an off-grid home or large boat that switches between grid and generator and needs big motor-starting power. The MultiPlus-II 48/5000 idles lower and has published UL certificates if one AC input is enough.
Amazon $1,785 Backwoods Solar $1,638.85For a large off-grid home or estate system on 48 V that needs huge 120 V output and fast generator charging. Pair two for 120/240 V split phase.
Amazon $2,766.75 Backwoods Solar $2,609.50For a 48 V cabin or boat that needs two AC inputs, such as grid plus generator, in a 3 kVA size. Buyers with one AC source get lower idle draw and UL listings from the MultiPlus-II 48/3000.
Backwoods Solar $1,310.70Compare the OutBack FXR3048A with any other 48V inverter →
More from OutBack Power: every OutBack Power product ranked.
