So a friend of mine is getting electrical power installed for an urban site he bought, and I'm just trying to be a good friend by looking into this. The company doing the installation recommended he go with 3-Phase AC current (230v because this is in the EU) just so that he'd be able to install an all-electric heating unit down the line. Now, it's obvious 3-phase power is incompatible with the vast majority of household electronics, so he's going to need some sort of transformer hooked-up.
This other question I stumbled upon mentions three different types: LeBlanc, Scott-T and Open-Delta.
Are any of these the most efficient? As-in, which gives the best conversion percentage and has the lowest idle power-loss. If not these, is there another you know of?
Thanks you in advance for any valuable insight you can provide.