The Champion 4000W Dual Fuel Inverter and the Pulsar PGD40ISCO are evenly matched, rated 3.3 and 3.3. The Champion 4000W Dual Fuel Inverter leads on fuel options and run time. The Pulsar PGD40ISCO wins on value. The Pulsar PGD40ISCO costs $268.93 less ($450.07 vs $719).
A compact dual-fuel inverter for small RVs and basic home backup at a low price per watt. It can just about run a small RV air conditioner, but don’t expect much else alongside it.
Amazon $719A light, inexpensive 4,000 W inverter for RV owners who need to start a rooftop air conditioner without hauling a heavy generator. Expect frequent refueling.
Amazon $450.07Prices were last checked October 22, 2026 and are subject to change; the price and availability shown by the retailer at the time of purchase apply.
Each factor is scored 0-100 against the same fixed reference points for every mid-size inverter generator; a clear win is highlighted. How we rank explains each one.
| Factor weight | Champion 4000W Dual Fuel Inverter | Pulsar PGD40ISCO |
|---|---|---|
| Overall rating | 3.3/5 | 3.3/5 |
| Value 30% | 78 $0.24 per running watt | 100 $0.14 per running watt |
| Quiet 20% | 12 64 dBA at light load, maker rating | 44 59 dBA at light load, maker rating |
| Run time 15% | 33 10 hours on a tank at 25% load | 0 5.3 hours on a tank at 25% load (scaled from 50%) |
| Fuel options 10% | 70 gasoline or propane | 0 gasoline only |
| CO safety 10% | 100 shuts off when carbon monoxide builds up | 50 CO shutoff not stated (neutral score used) |
| Warranty 10% | 50 3-year warranty | 50 3-year warranty |
| Starting 5% | 0 pull start only | 50 starting method not stated (neutral score used) |
| Champion 4000W Dual Fuel Inverter | Pulsar PGD40ISCO | |
|---|---|---|
| Output | ||
| Gasoline | 3,000 W running, 4,000 W starting | 3,200 W running, 4,000 W starting |
| Propane | 2,700 W running, 4,000 W starting | - |
| Outlets | 2 × 120 V, TT-30 (RV) | - |
| Parallel capable | Yes | Yes |
| Total harmonic distortion | under 3% | - |
| Price per watt | $0.24 | $0.14 |
| Fuel and run time | ||
| Fuel | Gasoline, propane | Gasoline |
| Tank | 1.5 gal | 1 gal |
| Run time (gasoline) | 10 hr at 25% load | 4 hr at 50% load |
| Run time (propane, 20 lb tank) | 25 hr | - |
| Engine | 149 cc | - |
| Noise and safety | ||
| Rated noise (light load) | 64 dBA | 59 dBA |
| CO shutoff | Yes | - |
| Build | ||
| Starting | Recoil (pull) | - |
| App | No | No |
| Wheels | No | - |
| Dimensions | 17.9 x 11.7 x 19.7 in | 18.9 x 11.4 x 17.3 in |
| Weight | 51.8 lb | 47.3 lb |
| Warranty | 3 years | 3 years |
