Xantrex PROwatt SW 600
#20 in Up to 1,000 WFull review
A small, listed inverter for CPAPs, laptops and TVs in a trailer or van. You pay a premium for the listing and Xantrex support.
Amazon $275.43$275.43
The Xantrex PROwatt SW 600 is the better 12V inverter overall, rated 2.9 to 2.8. The Xantrex PROwatt SW 600 leads on efficiency and features. The Samlex PST-600-12 wins on warranty. The Xantrex PROwatt SW 600 costs $40.40 less ($275.43 vs $315.83).
Samlex PST-600-12
#21 in Up to 1,000 WFull review
For boats and RVs that need a listed 600 W inverter with GFCI outlets for electronics and a small fridge.
Amazon $315.83$315.83
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 Xantrex PROwatt SW 600 for efficiency (90% peak efficiency (maker rating) vs 85% peak efficiency (maker rating)) and features (optional remote, display; no app vs optional remote; no app).
- Choose the Samlex PST-600-12 for warranty (3-year warranty vs 2-year warranty).
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 | Xantrex PROwatt SW 600 | Samlex PST-600-12 |
|---|---|---|
| Overall rating | 2.9/5 | 2.8/5 |
| Value 30% | 19 $0.51 per continuous watt | 15 $0.53 per continuous watt |
| Idle draw 15% | 53 0.6 A idle (about 7.2 W) with nothing plugged in | 53 0.6 A idle (about 7.2 W) with nothing plugged in |
| Safety listing 15% | 100 ETL listed to CSA C22.2 No. 107.1 and UL 458 with marine supplement | 100 Intertek ETL listed; conforms to UL 458 and certified to CSA C22.2 No. 107.1 |
| Warranty 15% | 25 2-year warranty | 50 3-year warranty |
| Features 15% | 22 optional remote, display; no app | 12 optional remote; no app |
| Efficiency 10% | 56 90% peak efficiency (maker rating) | 0 85% peak efficiency (maker rating) |
Specifications
| Xantrex PROwatt SW 600 | Samlex PST-600-12 | |
|---|---|---|
| Output | ||
| Type | Pure sine wave inverter | Pure sine wave inverter |
| Continuous power | 540 W | 600 W |
| Surge power | 1,200 W | 1,000 W |
| DC input range | 10.5 to 15.5 V | 10.7 to 16.5 V |
| Idle draw | 0.6 A (7.2 W) | 0.6 A (7.2 W) |
| Peak efficiency | 90% | 85% |
| Connections | ||
| AC outlets | 2 | 2 |
| GFCI outlets | Yes | Yes |
| Hardwire terminal | No | No |
| USB ports | 1 | None |
| Transfer switch | No | No |
| Parallel units | No | No |
| Control and build | ||
| Remote | Optional extra | Optional extra |
| App | No | No |
| Display | Yes | No |
| Safety listing | ETL listed to CSA C22.2 No. 107.1 and UL 458 with marine supplement | Intertek ETL listed; conforms to UL 458 and certified to CSA C22.2 No. 107.1 |
| Cooling | load-controlled fan | fan |
| Dimensions | 12.2 x 8.7 x 3.5 in (310 x 220 x 89 mm) | 238 x 276.2 x 82 mm (9.37 x 10.87 x 3.23 in) |
| Weight | 6.5 lb | 5.9 lb |
| Warranty | 2 years | 3 years |
| Released | 2009-10 | - |