Samlex PST-600-48
#9 in Up to 1,500 WFull review
For a small 48 V solar setup running electronics, lights and a router, with a real safety listing.
Amazon $400 Mr. Solar $348$348
The Samlex PST-600-48 is the better 48V inverter overall, rated 3.1 to 2.5. The Samlex PST-600-48 leads on safety listing, idle draw and warranty. The Cotek SP-700-148 wins on value and efficiency. The Samlex PST-600-48 costs $6 less ($348 vs $354).
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 Samlex PST-600-48 for safety listing (Intertek ETL listed; conforms to UL 458 and certified to CSA C22.2 No. 107.1 vs no UL 458 or UL 1741 listing stated), idle draw (14.4 W idle with nothing plugged in vs 24 W idle with nothing plugged in) and warranty (3-year warranty vs 2-year warranty).
- Choose the Cotek SP-700-148 for value ($0.51 per continuous watt vs $0.58 per continuous watt) and efficiency (93% peak efficiency (maker rating) vs 90% 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 | Samlex PST-600-48 | Cotek SP-700-148 |
|---|---|---|
| Overall rating | 3.1/5 | 2.5/5 |
| Value 30% | 20 $0.58 per continuous watt | 32 $0.51 per continuous watt |
| Idle draw 15% | 65 14.4 W idle with nothing plugged in | 25 24 W idle with nothing plugged in |
| Safety listing 15% | 100 Intertek ETL listed; conforms to UL 458 and certified to CSA C22.2 No. 107.1 | 0 no UL 458 or UL 1741 listing stated |
| Warranty 15% | 50 3-year warranty | 25 2-year warranty |
| Features 15% | 10 optional remote; no app | 10 optional remote; no app |
| Efficiency 10% | 56 90% peak efficiency (maker rating) | 89 93% peak efficiency (maker rating) |
Specifications
| Samlex PST-600-48 | Cotek SP-700-148 | |
|---|---|---|
| Output | ||
| Type | Pure sine wave inverter | Pure sine wave inverter |
| AC output | 120 V | 120 V |
| Continuous power | 600 W | 700 W |
| Surge power | 1,000 W | 1,230 W for 3 s |
| DC input range | 42 to 60 V | 42 to 66 V |
| Idle draw | 14.4 W (0.3 A at 48 V) | 24 W (0.5 A at 48 V) |
| Power-saving draw | - | 2.4 W |
| Peak efficiency | 90% | 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 | No | No |
| Display | No | No |
| Safety listing | Intertek ETL listed; conforms to UL 458 and certified to CSA C22.2 No. 107.1 | No |
| Cooling | fan | load-controlled fan |
| Dimensions | 238 x 276.2 x 82 mm (9.4 x 10.9 x 3.2 in) | 200 x 83 x 330 mm (7.9 x 3.3 x 13.0 in) |
| Weight | 5.9 lb | 5.7 lb |
| Warranty | 3 years | 2 years |