There was a recent inverter comparo I read. Honda, ryobi, Yamaha, generac.... I can’t remember if predator was included. they couldn’t attest to electronics quality and didn’t discuss things like firm mounting to heat sinks, but did look at cable management, tiedowns, etc., in addition to the obvious things like controls and materials. The main thing they noted on inverter boards was if the wires were firmly anchored for vibration and if they were epoxy potted. When dealing with powered PA speakers, amp board vibration against larger components has been the #1 killer, such as metal fatigue, even when hot glue is used on them. They still shake. IIRC, Honda and Yamaha pot their boards, and nobody else. Perhaps the others have alternate methods, but as a tinkerer, it left me wondering....