Victron Phoenix 48/375
#5 in Up to 1,500 WFull review
A small, frugal inverter for electronics on a 48 V system. Good for a dedicated low-power circuit next to a larger inverter.
The Victron Phoenix 48/375 is the better 48V inverter overall, rated 3.8 to 2.5. The Victron Phoenix 48/375 leads on safety listing, warranty and idle draw. The Cotek SP-700-148 wins on efficiency.
Cotek SP-700-148
#14 in Up to 1,500 WFull review
A plain, efficient 700 W inverter for a 48 V cabin or shop bank that plugs loads in directly.
Amazon $354$354
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 Victron Phoenix 48/375 for safety listing (LabTest certified to UL 458 (certificate LC20760-1) vs no UL 458 or UL 1741 listing stated), warranty (5-year warranty vs 2-year warranty) and idle draw (9 W idle with nothing plugged in vs 24 W idle with nothing plugged in).
- Choose the Cotek SP-700-148 for efficiency (93% peak efficiency (maker rating) vs 88% peak efficiency (maker rating)).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every up to 1,500 W 48V inverter; a clear win is highlighted. How we rank explains each one.
| Factor weight | Victron Phoenix 48/375 | Cotek SP-700-148 |
|---|---|---|
| Overall rating | 3.8/5 | 2.5/5 |
| Value 30% | 50 no current price (neutral score used) | 32 $0.51 per continuous watt |
| Idle draw 15% | 88 9 W idle with nothing plugged in | 25 24 W idle with nothing plugged in |
| Safety listing 15% | 100 LabTest certified to UL 458 (certificate LC20760-1) | 0 no UL 458 or UL 1741 listing stated |
| Warranty 15% | 100 5-year warranty | 25 2-year warranty |
| Features 15% | 20 optional remote, app add-on; no hardwire terminal | 10 optional remote; no app |
| Efficiency 10% | 33 88% peak efficiency (maker rating) | 89 93% peak efficiency (maker rating) |
Specifications
| Victron Phoenix 48/375 | Cotek SP-700-148 | |
|---|---|---|
| Output | ||
| Type | Pure sine wave inverter | Pure sine wave inverter |
| AC output | 120 V | 120 V |
| Continuous power | 375 W | 700 W |
| Surge power | 600 W for 2 s | 1,230 W for 3 s |
| DC input range | 36.8 to 62 V | 42 to 66 V |
| Idle draw | 9 W (0.2 A at 48 V) | 24 W (0.5 A at 48 V) |
| Power-saving draw | 2 W | 2.4 W |
| Peak efficiency | 88% | 93% |
| Connections | ||
| AC outlets | 2 | 2 |
| GFCI outlets | Yes | Yes |
| Hardwire terminal | No | No |
| USB ports | None | None |
| Transfer switch | No | No |
| Parallel units | No | No |
| Control and build | ||
| Remote | Optional extra | Optional extra |
| App | Optional add-on | No |
| Display | No | No |
| Safety listing | LabTest certified to UL 458 (certificate LC20760-1) | No |
| Cooling | fan | load-controlled fan |
| Dimensions | 86 x 165 x 260 mm (3.4 x 6.5 x 10.2 in) | 200 x 83 x 330 mm (7.9 x 3.3 x 13.0 in) |
| Weight | 6.6 lb | 5.7 lb |
| Warranty | 5 years | 2 years |