Do you know how these kits work? The whole point is that they’re plug-and-play. If the feed back into the grid, they are not plug and play and will require coordination with your power company lest you accidentally kill someone because you’re backfeeding into a line they turned off so they could work on it.
The kits have built-in measures to avoid backfeeding, or they would be illegal. Where I live, they’ve been deemed so unsafe, failsafe or not, that you’re just not allowed to use them.
They’ll get bailed out and push the cost on the rest of us, business as usual