Go Power! ASW-3000-12-TS
#20 in Over 2,000 WFull review
For RVs that already have a converter or solar charging and want an inverter with a built-in transfer switch.
Amazon $941.57$941.57
2.1/5
For RVs and cabins that hardwire a 3,000 W inverter into a subpanel.
- 3,000 WContinuous
- 6,000 WSurge
- 3.8 AIdle draw
- NoUL listed
- 2 yearsWarranty
Check price at Amazon$1,113
Price checked October 24, 2026. As an Amazon Associate we earn from qualifying purchases.
Pros
- Runs an RV air conditioner or several appliances
- Hardwires into a subpanel
- Power saving mode cuts idle draw to under 0.4 A
Cons
- No UL 458 listing by a named lab
- Two-year warranty
- Draws 3.8 A idle with power saving off
The Cotek SP family
Every Cotek SP model we rank, smallest first. Ratings compare each against its own size.
| Model | Continuous | Rating | Price |
|---|---|---|---|
| Cotek SP-700-112 | 700 W | 2.1/5 | $354 |
| Cotek SP-1000-112 | 1,000 W | 2.4/5 | $406 |
| Cotek SP-1500-112 | 1,500 W | 2.2/5 | $562 |
| Cotek SP-2000-112 | 2,000 W | 2.3/5 | $754 |
| Cotek SP-3000-112 (this one) | 3,000 W | 2.1/5 | $1,113 |
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 | SP-3000-112 |
|---|---|
| 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 16.5 V |
| Idle draw | 3.8 A (45.6 W) |
| Power-saving draw | 0.4 A |
| Peak efficiency | 90% |
| Connections | |
| AC outlets | 0 |
| GFCI outlets | No |
| Hardwire terminal | Yes |
| USB ports | None |
| Transfer switch | No |
| Parallel units | No |
| Control and build | |
| Remote | Optional extra |
| App | No |
| Display | No |
| Safety listing | No |
| Cooling | load-controlled fan |
| Dimensions | 255 x 158 x 442 mm (W x H x D) |
| Weight | 18.1 lb |
| Warranty | 2 years |
Alternatives in this size
Victron Phoenix 12/3000 120V
#21 in Over 2,000 WFull review
A heavy-duty 3,000 VA inverter for a large van, boat or cabin that has separate charging and shore-power switching. Most buyers are better served by a MultiPlus 12/3000, which adds the charger and transfer switch.
Amazon $862.79$862.79
Go Power! GP-ISW3000
#23 in Over 2,000 WFull review
For RVs that hardwire a 3,000 W inverter into a subpanel. Same hardware as the Cotek SP-3000-112.
Amazon $1,128.95$1,128.95
Compare
Compare the Cotek SP-3000-112 with any other 12V inverter →
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