Energy providers competent in managing 3-phase supplies?

debitcardmayhem

https://forums.moneysavingexpert.com/discussion/comment/81901104#Comment_81901104

The OP may live in a house which previously needed 3 phase e.g. a converted barn, or he may have an EV charger and other equipment that could need a more robust power supply.

@QrizB said most suppliers, or perhaps the major ones should cope with 3 phase, but not all of them have trained their CS properly, I also went to OVO ex SSE, and they couldn't sort out my export MPAN despite having the MCS cert and G99 .

Ildhund

Main fuse size

This just for information and convenience: a couple of years ago, I bookmarked the National Grid page giving details of their new cut-out fuse rating policy. Now I find that it generates an HTTP 403 response - insufficient permissions. It was the same however I tried to access the document, so here's the Wayback Machine's cached version for ease of reference: https://web.archive.org/web/20251008210730/https%3A//commercial.nationalgrid.co.uk/downloads-view-reciteme/633928

Ectophile

https://forums.moneysavingexpert.com/discussion/comment/81901104#Comment_81901104

I only have a 60A supply too.

I have an EV charger. But I don't have electric heating, a hot tub, a heated swimming pool, a workshop full of metal or woodworking machinery, or any of the other things that would require a lot of electricity.

I'm not sure what will happen if I want to switch to a heat pump, rather than a gas boiler.

Qyburn

https://forums.moneysavingexpert.com/discussion/6657009/energy-providers-competent-in-managing-3-phase-supplies

Nobody's commented on the "all three meter readings" comment. I only have hands on experience with two different three phase installations but neither records three meter readings. They record total use across all three.

littlemissbossy

Where I work we have 3 phase electric supply (I don’t understand anything about it). We are with EDF and I can submit all three meter readings individually.

[Deleted User]

https://forums.moneysavingexpert.com/discussion/comment/81902034#Comment_81902034

Do I need to upgrade my fuse board to install a heat pump? - R A Brown Heating Services Ltd

Note: I have no prior knowledge of the above website/business. No recommendation of them is implied. I do see they are based in Norwich, which is why they refer to UKPN (UK power Networks) which is the DNO for that area. You would need to refer to the DNO for where you live, but I would expect all DNOs to probably adopt a similar position as UKPN in this regard, so still worth a read.(imo)

Scot_39

https://forums.moneysavingexpert.com/discussion/comment/81902034#Comment_81902034

Google suggested upto just 3kW max input for a typical domestic ASHP (which could be say 9 upto 12kW output) - as thats the top I suspect is for quite a large home.

A full 7kW EV charger uses around half that rating - nominally 32A max.

Many wall boxes - or cars themselves can limit that though - some dynamically.

So they do have a mix of hardware ( a friends was hard set to 3.6kW iirc - so that might be a simple viable option on your model) or software / app limiting (even if not on wall on the car side ?).

Or even intelligent limits. As some chargers can support a form of "dynamic load limit or balancing" - measuring total home load (CT on incoming power line to get total Amps) - and de-rating charging to prioritise the home's other demands iirc. If worried near the safe limit - or rather I hope your electrician / ASHP installer is at survey time - and want full 7kW when can after adding a large load like ASHP - I'd probably say that sounds safest.

Other factors - like time and something electricians refer to as diversity (device dependent likely load factors - rather than full max loads).

Small short overloads arent normally an issue.

As your incoming fuse is a relatively slow blow cartridge fuse at modest overloads (typically a non linear heating dependency) - on cartridge fuses - the bigger the overload the much shorter the time).

The DNO 80A from 100A limit decision letter for instance in part justifies the drop by saying safely allows for old 100A "limit" (so a 25% "overload" - for upto 4 hours).

Just not sure they fully considered all conventional electric housings needs when doing so. Even in my 2 bed - dropping 100A to 80A could see a switch to 3 x60A.