Samlex NTX-600-12
#19 in Up to 1,000 WFull review
For small RVs and vans that want a listed 600 W inverter for electronics and a small fridge.
The Samlex NTX-600-12 is the better 12V inverter overall, rated 3.0 to 2.1. The Samlex NTX-600-12 leads on safety listing and idle draw. The Cotek SP-700-112 wins on features.
Cotek SP-700-112
#28 in Up to 1,000 WFull review
For campers who want a small, efficient inverter for electronics and a fridge.
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 NTX-600-12 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) and idle draw (0.9 A idle (about 10.8 W) with nothing plugged in vs 1.5 A idle (about 18 W) with nothing plugged in).
- Choose the Cotek SP-700-112 for features (optional remote; no app vs outlets only).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every up to 1,000 W 12V inverter; a clear win is highlighted. How we rank explains each one.
| Factor weight | Samlex NTX-600-12 | Cotek SP-700-112 |
|---|---|---|
| Overall rating | 3.0/5 | 2.1/5 |
| Value 30% | 50 no current price (neutral score used) | 20 $0.51 per continuous watt |
| Idle draw 15% | 13 0.9 A idle (about 10.8 W) with nothing plugged in | 0 1.5 A idle (about 18 W) 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% | 25 2-year warranty | 25 2-year warranty |
| Features 15% | 0 outlets only | 12 optional remote; no app |
| Efficiency 10% | 67 91% peak efficiency (maker rating) | 67 91% peak efficiency (maker rating) |
Specifications
| Samlex NTX-600-12 | Cotek SP-700-112 | |
|---|---|---|
| Output | ||
| Type | Pure sine wave inverter | Pure sine wave inverter |
| Continuous power | 600 W | 700 W |
| Surge power | 1,200 W for 1 s | 1,230 W for 3 s |
| DC input range | 10.5 to 16.3 V | 10.5 to 16.5 V |
| Idle draw | 0.9 A (10.8 W) | 1.5 A (18 W) |
| Power-saving draw | - | 0.1 A |
| Peak efficiency | 91% | 91% |
| Connections | ||
| AC outlets | 2 | 2 |
| GFCI outlets | No | Yes |
| Hardwire terminal | No | No |
| USB ports | 1 | None |
| Transfer switch | No | No |
| Parallel units | No | No |
| Control and build | ||
| Remote | No | 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 | load-controlled fan | load-controlled fan |
| Dimensions | 155 x 254 x 59 mm | 200 x 83 x 330 mm (W x H x D) |
| Weight | 2.4 lb | 5.7 lb |
| Warranty | 2 years | 2 years |