So, with 11 yr payback, by the time you break even, it would be renewal time. Makes no sense to me.
Makes more sense in hotter climes when you need cooling when the panels are producing.
Most inverters are warranted for 10-15 years with the panels warranted for 20-25 years usually. The way that the warranty on panels works is similar to the way that batteries in consumer electronics works, i.e. not that they're written off at 20 years, but rather that at 20 years you will get 80% of the initial capacity.