OutBack Radian GS4048A
For a small off-grid home that needs 240 V for a well pump but only 4 kW of steady load. Hard to find now, so check stock before designing around it.
Solar Cellz USA $2,995.75$2,995.75
The OutBack Radian GS4048A is the better 48V inverter overall, rated 3.7 to 3.6. The OutBack Radian GS4048A leads on warranty and features. The Magnum MS4448PAE wins on value and efficiency. The Magnum MS4448PAE costs $756.55 less ($2,239.20 vs $2,995.75).
Magnum MS4448PAE
For permitted 48 V off-grid or backup homes that need listed split-phase power and room to stack more units later.
Mr. Solar $2,239.20$2,239.20
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.
Which should you buy?
- Choose the OutBack Radian GS4048A for warranty (5-year warranty vs 3-year warranty) and features (optional remote, app add-on, lithium charge profile, 120/240 V split-phase, hardwire terminal vs optional remote, app add-on, 120/240 V split-phase, hardwire terminal).
- Choose the Magnum MS4448PAE for value ($0.51 per continuous watt vs $0.75 per continuous watt) and efficiency (94% peak efficiency (maker rating) vs 93% peak efficiency (maker rating)).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every split-phase inverter-chargers 48V inverter; a clear win is highlighted. How we rank explains each one.
| Factor weight | OutBack Radian GS4048A | Magnum MS4448PAE |
|---|---|---|
| Overall rating | 3.7/5 | 3.6/5 |
| Value 30% | 0 $0.75 per continuous watt | 9 $0.51 per continuous watt |
| Idle draw 15% | 95 34 W idle with nothing plugged in | 100 25 W idle with nothing plugged in |
| Safety listing 15% | 100 ETL listed to UL 1741 (2nd Ed. with supplement SA) and CSA C22.2 No. 107.1 | 100 ETL listed to UL 1741 (1st Ed.) and CSA C22.2 No. 107.1-01 |
| Warranty 15% | 100 5-year warranty | 50 3-year warranty |
| Features 15% | 70 optional remote, app add-on, lithium charge profile, 120/240 V split-phase, hardwire terminal | 60 optional remote, app add-on, 120/240 V split-phase, hardwire terminal |
| Efficiency 10% | 89 93% peak efficiency (maker rating) | 100 94% peak efficiency (maker rating) |
Specifications
| OutBack Radian GS4048A | Magnum MS4448PAE | |
|---|---|---|
| Output | ||
| Type | Pure sine wave inverter-charger | Pure sine wave inverter-charger |
| AC output | 120/240 V split-phase | 120/240 V split-phase |
| Continuous power | 4,000 W | 4,400 W |
| Surge power | 6,000 W for 5 s | 8,500 W for 5 s |
| DC input range | 40 to 64 V | 36 to 64 V |
| Idle draw | 34 W (0.7 A at 48 V) | 25 W (0.5 A at 48 V) |
| Power-saving draw | 10 W | 6 W |
| Peak efficiency | 93% | 94% |
| Connections | ||
| AC outlets | 0 | 0 |
| GFCI outlets | No | No |
| Hardwire terminal | Yes | Yes |
| USB ports | None | None |
| Transfer switch | Yes | Yes |
| Pass-through rating | 50 A | 30 A |
| Charger | 57.5 A | 60 A |
| Lithium charge profile | 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 | ETL listed to UL 1741 (2nd Ed. with supplement SA) and CSA C22.2 No. 107.1 | ETL listed to UL 1741 (1st Ed.) and CSA C22.2 No. 107.1-01 |
| Design | Low-frequency (transformer) | Low-frequency (transformer) |
| Cooling | fan | fan |
| Dimensions | 28 x 16 x 8.75 in (71.1 x 40.6 x 22.2 cm) | - |
| Weight | 82 lb | 55 lb |
| Warranty | 5 years | 3 years |
| Released | 2013-11 | - |