How much would a 3 phase installation cost in a residential house? Just out of curiosity, I’m not planning on getting it.
If having a your first charger fitted, there is a slim chance under certain criteria’s the work would be carried out free by the DNO. However in most instances it will cost around £4k to eye watering prices depending on the work needed.
Then there’s the question whether your supplier has or is installing 3 phase smart meters, plus your almost certainly be charged a higher standing charge than single phase.