Is this a good place to ask about home solar installation experiences? I don’t see a community description.

For people who have done it, what are the little things that surprised you either way?

In the US we’re phasing out the tax incentive for installing home solar installation experiences, so I’m considering getting it done asap while it’s still available. But I have questions like

• are there things I need to ask for or about?
• what happens when my roof needs repair or replacement? Is it expensive? What if the installer is no longer in business at that point?
• installers offer warrantees but what if they’re no longer in business 25 years from now? Would they be honored by manufacturers?
• my first quote claims 7 year payback. Is that believable or should I assume marketing BS? (When I first looked years ago I decided 7 was a good number if believable, but 12 years would be too long)
• my first quote offers an ‘Enphase’ microinverter. Home Assistant (home automation hub) has an integration, assuming there is an “Enphase Envoy” communications gateway and “grid consumption meter” but the quote doesn’t have that level of detail. Are those expected? Do I need to ask for them?
• my first quote talks about remote monitoring - are they going to charge me a subscription? Will everything work without a subscription? Will it continue working if the installer goes out of business?

Edit to add

• they quoted half my expected usage based on actual from the last year. Is this normal or likely because I have limited unshaded roof?
• my current electric bill is about half “generation” and half “delivery”. Obviously solar will reduce my “generation” charge. However without batteries, am I likely to still owe “delivery” on my own electricity?
• my area has net usage metering, which is great, but do they true up monthly or annually? If I generate more than I use in a month, am I wasting money, or will that help the next month? (I currently have gas heat so very electric low usage in winter)