Deep breath — no. I've lived this from the inside (the company I worked with, KOTA, collapsed in 2024 despite doing right by customers). Here's what survives: all equipment warranties — panels (25-30yr), inverters (10-25yr), batteries (10-15yr) are held by manufacturers, not your installer. On a PPA or lease, the agreement itself is an asset that gets bought by another provider, warranties intact — you might not even notice the change beyond a new logo on the bill.
What you lose is the workmanship warranty — the free labor. Manufacturers will replace failed parts but may charge for the truck roll. Thousands of San Diego homes are "orphaned" like this right now, and it's exactly why I built my audit and service business: someone has to take care of these systems for the next 20 years. If that's you, reach out — you're not stranded.