Giandel PS-3000KAR 3000W Pure Sine
#3 in Over 2,000 WFull review
The pick in Giandel’s range for a permanent RV or cabin install, since it is the 3000 W model with an ETL listing and a hardwire terminal.
Amazon $298.50$298.50
The Giandel PS-3000KAR 3000W Pure Sine is the better 12V inverter overall, rated 3.9 to 2.0. The Giandel PS-3000KAR 3000W Pure Sine leads on value, safety listing and features. The Go Power! GP-ISW3000 wins on warranty. The Giandel PS-3000KAR 3000W Pure Sine costs $830.45 less ($298.50 vs $1,128.95).
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
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 Giandel PS-3000KAR 3000W Pure Sine for value ($0.10 per continuous watt vs $0.38 per continuous watt), safety listing (ETL listed to UL 458 (per Giandel) vs no UL 458 or UL 1741 listing stated) and features (remote included, hardwire terminal, display; no app vs optional remote, hardwire terminal; no app).
- Choose the Go Power! GP-ISW3000 for warranty (2-year warranty vs 1.5-year warranty).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every over 2,000 W 12V inverter; a clear win is highlighted. How we rank explains each one.
| Factor weight | Giandel PS-3000KAR 3000W Pure Sine | Go Power! GP-ISW3000 |
|---|---|---|
| Overall rating | 3.9/5 | 2.0/5 |
| Value 30% | 94 $0.10 per continuous watt | 8 $0.38 per continuous watt |
| Idle draw 15% | 50 idle draw not published (neutral score used) | 0 3.8 A idle (about 45.6 W) with nothing plugged in |
| Safety listing 15% | 100 ETL listed to UL 458 (per Giandel) | 0 no UL 458 or UL 1741 listing stated |
| Warranty 15% | 12 1.5-year warranty | 25 2-year warranty |
| Features 15% | 50 remote included, hardwire terminal, display; no app | 28 optional remote, hardwire terminal; no app |
| Efficiency 10% | 78 92% peak efficiency (maker rating) | 56 90% peak efficiency (maker rating) |
Specifications
| Giandel PS-3000KAR 3000W Pure Sine | Go Power! GP-ISW3000 | |
|---|---|---|
| Output | ||
| Type | Pure sine wave inverter | Pure sine wave inverter |
| Continuous power | 3,000 W | 3,000 W |
| Surge power | 6,000 W | 6,000 W |
| DC input range | 9.8 to 16 V | 10.5 to 16.5 V |
| Idle draw | - | 3.8 A (45.6 W) |
| Power-saving draw | - | 0.4 A |
| Peak efficiency | 92% | 90% |
| Connections | ||
| AC outlets | 2 | 0 |
| GFCI outlets | No | No |
| Hardwire terminal | Yes | Yes |
| USB ports | 1 | None |
| Transfer switch | No | No |
| Parallel units | No | No |
| Control and build | ||
| Remote | Included | Optional extra |
| App | No | No |
| Display | Yes | No |
| Safety listing | ETL listed to UL 458 (per Giandel) | No |
| Cooling | load-controlled fan | load-controlled fan |
| Dimensions | - | 442 x 255 x 158 mm (17.40 x 10.04 x 6.22 in) |
| Weight | - | 18.1 lb |
| Warranty | 1.5 years | 2 years |