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
2.7/5
For a van or boat that needs listed, GFCI-protected power for laptops, TVs and chargers.
- 300 WContinuous
- 500 WSurge
- 0.5 AIdle draw
- YesUL listed
- 3 yearsWarranty
Check price at Amazon$251.80
Price checked October 24, 2026. As an Amazon Associate we earn from qualifying purchases.
Pros
- ETL listed to UL 458, so it passes RV and marine inspections
- GFCI outlets protect against shocks near water
- Can switch on and off with the ignition
- Three-year warranty
Cons
- 300 W runs electronics, not kitchen appliances
- Costs more than unlisted 300 W inverters
The Samlex PST family
Every Samlex PST model we rank, smallest first. Ratings compare each against its own size.
| Model | Continuous | Rating | Price |
|---|---|---|---|
| Samlex PST-120-12 | 120 W | 2.2/5 | $206.29 |
| Samlex PST-150-12 | 150 W | 2.7/5 | - |
| Samlex PST-300-12 (this one) | 300 W | 2.7/5 | $251.80 |
| Samlex PST-600-12 | 600 W | 2.8/5 | $315.83 |
| Samlex PST-1000F-12 | 1,000 W | 3.0/5 | - |
| Samlex PST-1000-12HD | 1,000 W | 2.6/5 | $637.55 |
| Samlex PST-1500-12 | 1,500 W | 2.9/5 | $616.04 |
| Samlex PST-2000-12 | 2,000 W | 2.8/5 | $1,096.99 |
| Samlex PST-3000-12 | 3,000 W | 3.3/5 | - |
How it scores
The rating comes from 6 measured or published factors, each scored 0-100 against fixed reference points for its size. How we rank explains each one.
Specifications
| Model number | PST-300-12 |
|---|---|
| Output | |
| Type | Pure sine wave inverter |
| Continuous power | 300 W |
| Surge power | 500 W for 8 ms |
| DC input range | 10.5 to 16.5 V |
| Idle draw | 0.5 A (6 W) |
| Peak efficiency | 87% |
| Connections | |
| AC outlets | 2 |
| GFCI outlets | Yes |
| Hardwire terminal | No |
| USB ports | None |
| Transfer switch | No |
| Parallel units | No |
| Control and build | |
| Remote | No |
| App | No |
| Display | No |
| Safety listing | Intertek ETL listed; conforms to UL 458 and certified to CSA C22.2 No. 107.1 |
| Cooling | fan |
| Dimensions | 155 x 246 x 65.5 mm |
| Weight | 3.5 lb |
| Warranty | 3 years |
Alternatives in this size
Samlex PST-150-12
#22 in Up to 1,000 WFull review
For a laptop and phone chargers in a car or truck cab. Buy the PST-300-12 if you need any headroom.
Samlex PST-1000-12HD
#24 in Up to 1,000 WFull review
For RV and boat builders who need a listed 1,000 W inverter that can be hardwired. Shoppers on a budget get more from the NTX-1000-12.
Amazon $637.55$637.55
Compare
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