Which specific type of renewable energy? There's essentially zero wear and tear on photovoltaic solar. Other than maybe a few fans it's entirely solid state. Wind turbines are turning out to have widespread gearbox lifetime issues, with many gearboxes lasting significantly less than their 20-30 design lifetimes. But that's probably going to improve. And direct drive turbines are becoming more common.

Depends. While PV solar panels are rated up to 30 years useful life and there is indeed no mechanical action going on in their operation, the semiconductors inside them doesn't like high heat, so it tends to need some form of cooling. Not sure how the PV parks they're putting up in New Mexico and various tropic locations will fare. I guess we'll see.