Samlex EVO-4248SP
For a 48 V off-grid home or backup system that needs 120/240 V from a single listed inverter-charger.
Battery Stuff $2,228.90 Don Rowe $2,228.90$2,228.90
The Samlex EVO-4248SP is the better 48V inverter overall, rated 3.5 to 3.3. The Samlex EVO-4248SP 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 $1,583.90 less ($645 vs $2,228.90).
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 Samlex EVO-4248SP for safety listing (CSA listed; conforms to UL 1741 2nd Ed. and CAN/CSA C22.2 No. 107.1 vs no UL 458 or UL 1741 listing stated), warranty (3-year warranty vs 1-year warranty) and efficiency (93% 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 $0.53 per continuous watt) and features (optional remote, app add-on, lithium charge profile, 120/240 V split-phase, display vs optional remote, lithium charge profile, 120/240 V split-phase, hardwire terminal; no app).
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 | Samlex EVO-4248SP | Ampinvt FT 5000W 48V Split Phase |
|---|---|---|
| Overall rating | 3.5/5 | 3.3/5 |
| Value 30% | 4 $0.53 per continuous watt | 94 $0.13 per continuous watt |
| Idle draw 15% | 97 30 W idle with nothing plugged in | 50 idle draw not published (neutral score used) |
| Safety listing 15% | 100 CSA listed; conforms to UL 1741 2nd Ed. and CAN/CSA C22.2 No. 107.1 | 0 no UL 458 or UL 1741 listing stated |
| Warranty 15% | 50 3-year warranty | 0 1-year warranty |
| Features 15% | 65 optional remote, lithium charge profile, 120/240 V split-phase, hardwire terminal; no app | 75 optional remote, app add-on, lithium charge profile, 120/240 V split-phase, display |
| Efficiency 10% | 89 93% peak efficiency (maker rating) | 56 90% peak efficiency (maker rating) |
Specifications
| Samlex EVO-4248SP | 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 | 4,200 W | 5,000 W |
| Surge power | 6,300 W for 30 s | 15,000 W |
| DC input range | 36 to 68 V | - |
| Idle draw | 30 W (0.6 A at 48 V) | - |
| Power-saving draw | 8 W | - |
| Peak efficiency | 93% | 90% |
| Connections | ||
| AC outlets | 0 | - |
| GFCI outlets | No | - |
| Hardwire terminal | Yes | - |
| USB ports | None | - |
| Transfer switch | Yes | Yes |
| Pass-through rating | 40 A | - |
| Charger | 60 A | 35 A |
| Lithium charge profile | Yes | Yes |
| Parallel units | No | No |
| Control and build | ||
| Remote | Optional extra | Optional extra |
| App | No | Optional add-on |
| Display | - | Yes |
| Safety listing | CSA listed; conforms to UL 1741 2nd Ed. and CAN/CSA C22.2 No. 107.1 | No |
| Design | Low-frequency (transformer) | Low-frequency (transformer) |
| Cooling | fan | fan |
| Dimensions | 324 x 415 x 212 mm (12.8 x 16.3 x 8.3 in) | 23.8 x 6.7 x 10.2 in |
| Weight | 64 lb | 70.5 lb |
| Warranty | 3 years | 1 year |