For cabins and work trucks that want a listed 3,000 W inverter with plain household outlets.
Price checked October 24, 2026. As an Amazon Associate we earn from qualifying purchases.
Every Samlex NTX model we rank, smallest first. Ratings compare each against its own size.
| Model | Continuous | Rating | Price |
|---|---|---|---|
| Samlex NTX-400-12 | 400 W | 3.1/5 | - |
| Samlex NTX-600-12 | 600 W | 3.0/5 | - |
| Samlex NTX-1000-12 | 1,000 W | 3.1/5 | $373.32 |
| Samlex NTX-1500-12 | 1,500 W | 3.4/5 | $422.50 |
| Samlex NTX-2000-12 | 2,000 W | 3.4/5 | $511.88 |
| Samlex NTX-3000-12 | 3,000 W | 3.4/5 | $741.97 |
| Samlex NTX-3000S-12 (this one) | 3,000 W | 3.5/5 | $732.40 |
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.
| Model number | NTX-3000S-12 |
|---|---|
| Output | |
| Type | Pure sine wave inverter |
| Continuous power | 3,000 W |
| Surge power | 6,000 W for 1 s |
| DC input range | 10.5 to 16.3 V |
| Idle draw | 1.1 A (13.2 W) |
| Peak efficiency | 90.5% |
| Connections | |
| AC outlets | 3 |
| GFCI outlets | No |
| Hardwire terminal | No |
| USB ports | None |
| Transfer switch | No |
| Parallel units | No |
| Control and build | |
| Remote | Included |
| App | No |
| Display | No |
| Safety listing | Intertek ETL listed; conforms to UL 458 and certified to CSA C22.2 No. 107.1 |
| Cooling | load-controlled fan |
| Dimensions | 216 x 451 x 92 mm (8.50 x 17.75 x 3.62 in) |
| Weight | 12 lb |
| Warranty | 2 years |
The budget way to get a listed 3000 W inverter with a hardwire terminal, for work trucks and simple RV setups. Pair it with an external transfer switch if you have shore power.
Amazon $535.33A big, low-idle inverter for large off-grid banks at a modest price. The very short surge and lack of a listing count against it for air conditioners and permanent installs.
Amazon $379.99 EDECOA $360For RVs that want to feed the whole coach panel through a 30 A cord from a listed inverter.
Amazon $741.97Compare the Samlex NTX-3000S-12 with any other 12V inverter →
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