Usually the expected life is ~30 years. They may last longer. I do wonder if pests and moisture will be early failure causes in this configuration though. Then

Usually the expected life is ~30 years. They may last longer. I do wonder if pests and moisture will be early failure causes in this configuration though. Then again, if it saves enough money, maybe that doesn't matter. TBH, the part that lasts the least amount of time is often the inverter.