House system PLUS annex system - ADVICE?

[KSOL72]

A client wants a system on their house PLUS a separate system on the annex adjacent to the house which is not physically connected and currently under construction. The PP for the annex states it is not a separate property and therefore they'll be one MPAN for the whole ie. house and annex. Has anybody done this and what implications are there for MCS, DNO or other. The 2 systems together are approaching 4kWp...please comment if you're had experience of this.

Thanks

 

[BruceB]

Even if it is one 'planning unit' as you state, that is not relevant to the number of MPANs. It is down to the customer and the DNO whether they do it all on one supply (and therefore one MPAN) or whether the DNO puts in another supply to the Annex. Provided the Annex is close then it will be cheaper NOT to have a separate supply and extra MPAN because that way only one standing charge will be paid. If in total it is too much for 100A single phase then get another phase (or 3 phase) put in, which gives more flexibility if trying to stay within 16A per phase.

Regards
Bruce

 

[KSOL72]

This is what UK Power Networks say...from the same information I've given you.
As I can see it, if it is being connected to the network through current MPAN, then this is how we would register the Notification.

I cannot comment on actual FiT as we do not pay this, it would be the supplier.

Also, my suspicion is that the annex will in the future become a separate dwelling altogether - it's within 2m of the house by the way. Where would that leave FIT? If they did connect through the existing MPAN only to split later would FIT revert to whatever it was at that time...

 

[BruceB]

Not sure what your question is.

You need to do some background reading on how the FIT works. An installation and a FIT contract are associated with an MPAN. But the person who has the contract with the FIT supplier does not need to be the consumer at the MPAN addresss. It could in priinciple be anyone. Whether the FIT contract moves on sale and purchase of a house comes down to what is agreed between the parties and what a mortgage company would allow if one were involved.

Regards
Bruce

 

[KSOL72]

I'm concentrating on the position as it is now. The direction from DNO is a little vague if as you say they agree with the customer if an other supply is to be connected or not.

If the property is split up and sold in the future that's another thing - it was just my suspicion. BTW, when asking a local conveyancing lawyer he did not know how we would approach FIT during a property sale whether a lender was involved or not.

I'll do that background reading and suggest the DNO do the same

 

[sparkyjohn1]

I have fed an annex with a 63 amp supply before, (after discussing with landlord the possible maximum current draw.) Split the main incomer with a henley block Installed a switch fuse with 63 amp cartridge fuse AND a 63 amp RCD. Fed Annex with 16mm S.W.A. 25 Metre run, and installed C/U at other end.. the Annex in question wasn't being used every day, more of a holiday home,. for the odd weekend , ( by the south coast.).. Taking into consideration diversity factor, i think my calcs were about right,,