OutBack FXR3048A
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.
Northern Arizona Wind & Sun $2,314$2,314
The OutBack FXR3048A rates 3.5 among 120V inverter-chargers 48V inverters; the AIMS Power 3000W 48V Rack Mount rates 2.7 among over 1,500 W ones. The AIMS Power 3000W 48V Rack Mount costs $1,245 less ($1,069 vs $2,314).
AIMS Power 3000W 48V Rack Mount
#14 in Over 1,500 WFull review
For a 48 V telecom or solar rack that needs 3,000 W of 120 V backup in 2U of rack space. It switches loads from utility to battery itself but doesn’t charge the battery.
Amazon $1,069$1,069
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 (120V inverter-chargers and over 1,500 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 | OutBack FXR3048A | AIMS Power 3000W 48V Rack Mount |
|---|---|---|
| Overall rating | 3.5/5 | 2.7/5 |
| Value 30% | 4 $0.77 per continuous watt | 25 $0.36 per continuous watt |
| Idle draw 15% | 66 34 W idle with nothing plugged in | 65 24 W idle with nothing plugged in |
| Safety listing 15% | 100 ETL listed to UL 1741 (2nd Ed. with supplement SA) | 0 no UL 458 or UL 1741 listing stated |
| Warranty 15% | 100 5-year warranty | 25 2-year warranty |
| Features 15% | 50 optional remote, app add-on, lithium charge profile, hardwire terminal | 40 transfer switch, hardwire terminal, display; no remote |
| Efficiency 10% | 89 93% peak efficiency (maker rating) | 67 91% peak efficiency (maker rating) |
Specifications
| OutBack FXR3048A | AIMS Power 3000W 48V Rack Mount | |
|---|---|---|
| Output | ||
| Type | Pure sine wave inverter-charger | Pure sine wave inverter |
| AC output | 120 V | 120 V |
| Continuous power | 3,000 W | 3,000 W |
| Surge power | 5,400 W for 5 s | 6,000 W |
| DC input range | 42 to 68 V | 41 to 60 V |
| Idle draw | 34 W (0.7 A at 48 V) | 24 W (0.5 A at 48 V) |
| Power-saving draw | 9 W | - |
| Peak efficiency | 93% | 91% |
| Connections | ||
| AC outlets | 0 | 2 |
| GFCI outlets | No | No |
| Hardwire terminal | Yes | Yes |
| USB ports | None | None |
| Transfer switch | Yes | Yes |
| Pass-through rating | 60 A | - |
| Charger | 35 A | - |
| Lithium charge profile | Yes | - |
| Parallel units | Yes | No |
| Control and build | ||
| Remote | Optional extra | No |
| App | Optional add-on | No |
| Display | No | Yes |
| Safety listing | ETL listed to UL 1741 (2nd Ed. with supplement SA) | No |
| Design | Low-frequency (transformer) | High-frequency |
| Cooling | fan | load-controlled fan |
| Dimensions | 13 x 8.25 x 16.25 in (33 x 21 x 41 cm) | 20.9 x 16.5 x 3.5 in |
| Weight | 62 lb | 27.6 lb |
| Warranty | 5 years | 2 years |