Champion 6500W Tri Fuel Inverter
#3 in LargeFull review
A mid-size home-backup inverter for people with a natural gas line or a transfer switch who want unattended starting. It also covers a 30 A RV.
Amazon $1,149$1,149
The Champion 6500W Tri Fuel Inverter is the better inverter generator overall, rated 4.1 to 2.9. The Champion 6500W Tri Fuel Inverter leads on fuel options, run time and starting.
Champion 9000W Open Frame CARB
#11 in LargeFull review
A big open-frame inverter for California homes and 50 A RVs that need clean power through a transfer switch, when you can find it in stock.
AmazonPrices were last checked October 28, 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 Champion 6500W Tri Fuel Inverter for fuel options (gasoline, propane or natural gas vs gasoline only), run time (18 hours on a tank at 25% load vs 10.5 hours on a tank at 25% load) and starting (electric start with a remote fob or app vs push-button electric start).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every large inverter generator; a clear win is highlighted. How we rank explains each one.
| Factor weight | Champion 6500W Tri Fuel Inverter | Champion 9000W Open Frame CARB |
|---|---|---|
| Overall rating | 4.1/5 | 2.9/5 |
| Value 30% | 74 $0.22 per running watt | 50 no current price (neutral score used) |
| Quiet 20% | 50 64 dBA at light load, maker rating | 0 72 dBA at light load, maker rating |
| Run time 15% | 86 18 hours on a tank at 25% load | 32 10.5 hours on a tank at 25% load |
| Fuel options 10% | 100 gasoline, propane or natural gas | 0 gasoline only |
| CO safety 10% | 100 shuts off when carbon monoxide builds up | 100 shuts off when carbon monoxide builds up |
| Warranty 10% | 50 3-year warranty | 50 3-year warranty |
| Starting 5% | 100 electric start with a remote fob or app | 80 push-button electric start |
Specifications
| Champion 6500W Tri Fuel Inverter | Champion 9000W Open Frame CARB | |
|---|---|---|
| Output | ||
| Gasoline | 5,250 W running, 6,500 W starting | 7,250 W running, 9,000 W starting |
| Propane | 4,725 W running, 6,500 W starting | - |
| Natural gas | 4,253 W running | - |
| Outlets | 4 × 120 V, TT-30 (RV), L14-30 | 4 × 120 V, L14-30, USB |
| Parallel capable | No | No |
| Total harmonic distortion | under 3% | under 3% |
| Price per watt | $0.22 | - |
| Fuel and run time | ||
| Fuel | Gasoline, propane, natural gas | Gasoline |
| Tank | 4.5 gal | 4.3 gal |
| Run time (gasoline) | 18 hr at 25% load | 10.5 hr at 25% load |
| Run time (propane, 20 lb tank) | 16 hr | - |
| Engine | 224 cc | 420 cc |
| Noise and safety | ||
| Rated noise (light load) | 64 dBA | 72 dBA |
| CO shutoff | Yes | Yes |
| CARB compliant | No | Yes |
| Build | ||
| Starting | Remote, electric and recoil | Electric and recoil |
| App | No | No |
| Wheels | Yes | Yes |
| Dimensions | 25.2 x 20.5 x 22.6 in | 26.6 x 25.5 x 24.6 in |
| Weight | 123.5 lb | 152.2 lb |
| Warranty | 3 years | 3 years |
| Released | 2026-01 | 2022-07 |