Holding 5000 rated watts from an inverter body is what puts this GENMAX at the top, because the 5500 in the label is only 10 percent above the continuous figure. That honesty is rare at this size. It carries a 3.9 gallon tank, a telescoping handle, manual and electric start, and a panel with alarms for low oil, overload, fault and carbon monoxide.
For a trailer with two air conditioners the 5000 rated figure is enough if the compressors are started a minute apart, and a soft start device on each makes it comfortable. The inverter waveform keeps the converter and electronics in a modern RV happy, with distortion under 3 percent. Eco mode lowers fuel burn at light loads, such as a night with only the refrigerator running.
The CO light is a warning, not a shutoff, so the placement rule still applies. A 3.9 gallon tank is generous, but it holds a lot of gasoline that should be stabilized if the trailer sits. It is EPA compliant, which makes it usable in more states than some imports. Compared with the WEN at 5100 rated, it gives up 100 watts and the automatic shutdown but keeps a much larger tank and a lower likely price, which is why it wins on balance.
What works
- 5000 rated watts, a small gap to the 5500 peak
- 3.9 gallon tank for long runs
- Low oil, overload and CO warning panel
- Manual and electric start
Watch out for
- CO light warns but does not shut down
- Large tank of gasoline can go stale
Spec sheet
- Rated watts
- 5000
- Peak watts
- 5500
- Fuel tank
- 3.9 gallons
- Start
- Manual and electric
- Alerts
- Low oil, overload, CO light, fault






