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would say, from my experience of having two 7Kw chargers installed at home, that there isn't enough experienced installers out there.
This. It's a new thing, doesn't just involve a Sparks. You'll need scaffolding, someone to sign off the roof can have the extra weight of solar, plumbing if you want link it to heating, extra meters if you want to sell the current back to the grid, batteries if you want to store it.
I would say, from my experience of having two 7Kw chargers installed at home, that there isn't enough experienced installers out there.
The number of regulations, specific model oddities and requirements are mind boggling.