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 WZRELB 3000W 48V Split Phase (SPVC) rates 3.0 among over 1,500 W ones. The WZRELB 3000W 48V Split Phase (SPVC) costs $1,802.80 less ($511.20 vs $2,314).
WZRELB 3000W 48V Split Phase (SPVC)
#12 in Over 1,500 WFull review
A low-cost way to get 120/240 V split phase from a 48 V bank for light 240 V loads. Documentation is thin, so it suits DIY builders on a budget.
Amazon $511.20$511.20
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 | WZRELB 3000W 48V Split Phase (SPVC) |
|---|---|---|
| Overall rating | 3.5/5 | 3.0/5 |
| Value 30% | 4 $0.77 per continuous watt | 76 $0.17 per continuous watt |
| Idle draw 15% | 66 34 W idle with nothing plugged in | 50 idle draw not published (neutral score used) |
| 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 | 0 1-year warranty |
| Features 15% | 50 optional remote, app add-on, lithium charge profile, hardwire terminal | 40 120/240 V split-phase, hardwire terminal, display; no remote |
| Efficiency 10% | 89 93% peak efficiency (maker rating) | 73 91.6% peak efficiency (maker rating) |
Specifications
| OutBack FXR3048A | WZRELB 3000W 48V Split Phase (SPVC) | |
|---|---|---|
| Output | ||
| Type | Pure sine wave inverter-charger | Pure sine wave inverter |
| AC output | 120 V | 120/240 V split-phase |
| 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 | - |
| Idle draw | 34 W (0.7 A at 48 V) | - |
| Power-saving draw | 9 W | - |
| Peak efficiency | 93% | 91.6% |
| Connections | ||
| AC outlets | 0 | 4 |
| GFCI outlets | No | - |
| Hardwire terminal | Yes | Yes |
| USB ports | None | - |
| Transfer switch | Yes | No |
| 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 | fan |
| Dimensions | 13 x 8.25 x 16.25 in (33 x 21 x 41 cm) | 14.96 x 9.76 x 5.2 in |
| Weight | 62 lb | 15.8 lb |
| Warranty | 5 years | 1 year |