I’m not sure about your home insurer, but here in the UK, most home electrical wiring, including solar for example, is “notifiable” to building control and requires a qualified tradesperson to implement.
If you want to DIY everything you need self-build insurance.
I’m definitely not covered if I were to burn my house down with a dodgy inverter installation.
In many (most? all?) jurisdictions in the US there's a carveout to exempt DIY work from licensing requirements and to require insurance to cover it.
Many things you still have to get a permit and have it inspected afterwards just like a professional would. But if you skip that no one will ever notice unless it's major structural work (such as a new deck).
That said, if it's electrical and you skip the required inspection and then your house burns down and your work was at fault that might nullify your insurance but I'm not sure.
If you want to DIY everything you need self-build insurance.
I’m definitely not covered if I were to burn my house down with a dodgy inverter installation.