Some of those items smell of scam to me as they are not normal wear items and are in fact rather strange.
How is a slide motor "worn out"? Does it work? If so then its probably fine.
Hail damage to roof? Is there a leak or physical damage that must be repaired?
Seals "deteriorating"? They've either failed or are good and just need dressing.
Inverter overcharging? Really? You would have a converter unless you added the inverter, and if anything it (the converter) would be under charging (unless it's a single stage and then that's normal).
I'd go someplace else.