The Renogy 3000W HF Inverter Charger rates 3.9 among inverter-chargers 12V inverters; the Cotek SP-3000-112 rates 2.1 among over 2,000 W ones. The Renogy 3000W HF Inverter Charger costs $463.01 less ($649.99 vs $1,113).
For RVs and home backup with a big 12 V lithium bank that want fast shore charging and seamless changeover. It undercuts the major brands while matching their headline features.
Amazon $649.99For RVs and cabins that hardwire a 3,000 W inverter into a subpanel.
Amazon $1,113Prices were last checked November 1, 2026 and are subject to change; the price and availability shown by the retailer at the time of purchase apply.
These two sit in different size classes (inverter-chargers and over 2,000 W), and each is scored against the reference points for its own class, so a rating says how well each does among its own size peers. How we rank explains each factor.
| Factor weight | Renogy 3000W HF Inverter Charger | Cotek SP-3000-112 |
|---|---|---|
| Overall rating | 3.9/5 | 2.1/5 |
| Value 30% | 100 $0.22 per continuous watt | 9 $0.37 per continuous watt |
| Idle draw 15% | 93 1 A idle (about 12 W) with nothing plugged in | 0 3.8 A idle (about 45.6 W) with nothing plugged in |
| Safety listing 15% | 0 no UL 458 or UL 1741 listing stated | 0 no UL 458 or UL 1741 listing stated |
| Warranty 15% | 25 2-year warranty | 25 2-year warranty |
| Features 15% | 92 remote included, app, lithium charge profile, display | 28 optional remote, hardwire terminal; no app |
| Efficiency 10% | 56 90% peak efficiency (maker rating) | 56 90% peak efficiency (maker rating) |
| Renogy 3000W HF Inverter Charger | Cotek SP-3000-112 | |
|---|---|---|
| Output | ||
| Type | Pure sine wave inverter-charger | Pure sine wave inverter |
| Continuous power | 3,000 W | 3,000 W |
| Surge power | 6,000 W for 100 ms | 6,000 W for 1 s |
| DC input range | 10.5 to 16.5 V | 10.5 to 16.5 V |
| Idle draw | 1 A (12 W) | 3.8 A (45.6 W) |
| Power-saving draw | - | 0.4 A |
| Peak efficiency | 90% | 90% |
| Connections | ||
| AC outlets | - | 0 |
| GFCI outlets | - | No |
| Hardwire terminal | - | Yes |
| USB ports | - | None |
| Transfer switch | Yes | No |
| Charger | 100 A | - |
| Lithium charge profile | Yes | - |
| Parallel units | - | No |
| Control and build | ||
| Remote | Included | Optional extra |
| App | Built in | No |
| Display | Yes | No |
| Safety listing | No | No |
| Cooling | - | load-controlled fan |
| Dimensions | 17.0 x 11.3 x 4.3 in | 255 x 158 x 442 mm (W x H x D) |
| Weight | 16.3 lb | 18.1 lb |
| Warranty | 2 years | 2 years |
| Released | 2026-09 | - |
