Had all this semi-relevant shit written up and it was eaten by the internet... (Edit: Oh look, it's just below this post!)
Here's the gist of it. I'm German, so tough shit with US dealers.
Find a dealer you can trust. If possible, ask a friend just like if you were a woman and out to buy a used car. :)
Edit: The letter f
I kinda figured you were German, which is why I asked about US dealers and not dealers in general. As for asking a friend, there aren't many who have solar, and almost everyone doing solar in the US nowadays is using grid-tie and no batteries, or using Tesla batteries which are overpriced and require the cloud for management.
(post is archived)