A 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.
Price checked October 22, 2026. As an Amazon Associate we earn from qualifying purchases.
The rating comes from 7 measured or published factors, each scored 0-100 against fixed reference points for its size. How we rank explains each one.
| Model number | PGD40ISCO |
|---|---|
| Output | |
| Gasoline | 3,200 W running, 4,000 W starting |
| Parallel capable | Yes |
| Price per watt | $0.14 |
| Fuel and run time | |
| Fuel | Gasoline |
| Tank | 1 gal |
| Run time (gasoline) | 4 hr at 50% load |
| Noise and safety | |
| Rated noise (light load) | 59 dBA |
| Build | |
| App | No |
| Dimensions | 18.9 x 11.4 x 17.3 in |
| Weight | 47.3 lb |
| Warranty | 3 years |
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 low-cost way to run a 30 A camper with one air conditioner, with electric start and CO shutoff. Expect to buy an extended warranty if you want long-term cover.
Harbor Freight $799.99An RV-ready mid-size inverter with electric start at a modest price. It lacks CO shutoff, which newer models include.
Amazon $699.99Compare the Pulsar PGD40ISCO with any other inverter generator →
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