I purchased my Predator 9000 from harbor freight just a month before Hurricane Laura. I put an hour meter on it and I used it the first time during the storm overnight. 15.6 hours later I lost power. It cycles intermittently by almost climbing to peak voltage then dropping off to zero then a second later peaking then dropping off to zero again repeatedly. Please if anyone has any ideas to the problem it would be tremendously appreciated. Thanks in advance.