Reinstating 3 phase supply

Hi there, the original electrical installation for my property had a three phase supply, a few years ago another energy supplier changed us to use single phase, we have now tried to go green with solar panels and have re-wired and installed under floor heating, my electrician says that we should now reinstate the existing three phase supply, is this something that bulb can do for us and with a new smart meter?

There are no SMETS2 3-phase meters as of yet.