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
The Magnum MS4448PAE is the better 48V inverter overall, rated 3.6 to 3.3. The Magnum MS4448PAE leads on safety listing, warranty and efficiency. The Ampinvt FT 5000W 48V Split Phase wins on value and features. The Ampinvt FT 5000W 48V Split Phase costs $1,594.20 less ($645 vs $2,239.20).
Ampinvt FT 5000W 48V Split Phase
A budget low-frequency split-phase inverter-charger for an off-grid cabin with a 240 V generator. It handles heavy loads, but documentation is thin and it cannot be stacked.
Amazon $645$645
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 Magnum MS4448PAE for safety listing (ETL listed to UL 1741 (1st Ed.) and CSA C22.2 No. 107.1-01 vs no UL 458 or UL 1741 listing stated), warranty (3-year warranty vs 1-year warranty) and efficiency (94% peak efficiency (maker rating) vs 90% peak efficiency (maker rating)).
- Choose the Ampinvt FT 5000W 48V Split Phase for value ($0.13 per continuous watt vs $0.51 per continuous watt) and features (optional remote, app add-on, lithium charge profile, 120/240 V split-phase, display vs optional remote, app add-on, 120/240 V split-phase, hardwire terminal).
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 | Magnum MS4448PAE | Ampinvt FT 5000W 48V Split Phase |
|---|---|---|
| Overall rating | 3.6/5 | 3.3/5 |
| Value 30% | 9 $0.51 per continuous watt | 94 $0.13 per continuous watt |
| Idle draw 15% | 100 25 W idle with nothing plugged in | 50 idle draw not published (neutral score used) |
| Safety listing 15% | 100 ETL listed to UL 1741 (1st Ed.) and CSA C22.2 No. 107.1-01 | 0 no UL 458 or UL 1741 listing stated |
| Warranty 15% | 50 3-year warranty | 0 1-year warranty |
| Features 15% | 60 optional remote, app add-on, 120/240 V split-phase, hardwire terminal | 75 optional remote, app add-on, lithium charge profile, 120/240 V split-phase, display |
| Efficiency 10% | 100 94% peak efficiency (maker rating) | 56 90% peak efficiency (maker rating) |
Specifications
| Magnum MS4448PAE | Ampinvt FT 5000W 48V Split Phase | |
|---|---|---|
| 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 | 4,400 W | 5,000 W |
| Surge power | 8,500 W for 5 s | 15,000 W |
| DC input range | 36 to 64 V | - |
| Idle draw | 25 W (0.5 A at 48 V) | - |
| Power-saving draw | 6 W | - |
| Peak efficiency | 94% | 90% |
| Connections | ||
| AC outlets | 0 | - |
| GFCI outlets | No | - |
| Hardwire terminal | Yes | - |
| USB ports | None | - |
| Transfer switch | Yes | Yes |
| Pass-through rating | 30 A | - |
| Charger | 60 A | 35 A |
| Lithium charge profile | - | Yes |
| Parallel units | Yes | No |
| Control and build | ||
| Remote | Optional extra | Optional extra |
| App | Optional add-on | Optional add-on |
| Display | No | Yes |
| Safety listing | ETL listed to UL 1741 (1st Ed.) and CSA C22.2 No. 107.1-01 | No |
| Design | Low-frequency (transformer) | Low-frequency (transformer) |
| Cooling | fan | fan |
| Dimensions | - | 23.8 x 6.7 x 10.2 in |
| Weight | 55 lb | 70.5 lb |
| Warranty | 3 years | 1 year |