G83 vs 59

[Noddy67]

Hi

i've done 50 installs so far but all single phase, domestics which come in the 'fit and inform' category.

Now I've had a tentative question about putting 6kw on a block of flats, all under the landlords supply.

What i've not really got my head around is, can you go above the 3.6/4kw limits as long as you apply via the G59, or is it an absolute no no and we'd have to go to more than one of their phases?

How long does it take for the G59 agreement to come back? Is it a formality or a chance that the board say no.

Any pointers in the right direction woudl be good as I'm getting a call shortly and want to start off in the right direction.

thanks in advance.

R

 

[dansk]

Hi - im no expert on G59 - but as long as you dont exceed 16A per phase its G83, if the property has 3 phase then happy days, if not then apply for g59 - i have heard if you speak to the DNO in question they sometimes permit over 16A under G83, but its their call, and you need it in writing.

 

[Stephen]

We recently installed a system just under 10 kWp. With the rush the DNO suggested that we avoid going through G59 as they could not guarantee that we would have to the go-ahead in time. The answer in this case was to use three G83 inverters. One per phase.
You could use two 3 kW inverters across two phases or three 2kW inverters across the three phases.

 

[BruceB]

Or just a single 3 phase inverter which would save a lot of hassle and money. A 10kW 3 phase inverter can connect under G83/1-1 Stage 1.

 

[Noddy67]

the clients asked for it all to be on the landlords supply which i'm assuming will be a single phase supply for the communal lighting/security etc... and this will be just one of the three phases that will be coming into the bulding (ten flats in the block).

If I'm reading all your responses correctly I'd need to use the other phases from an occupants supply, and then they'd get the free electricity if not the FIT (which could go to the landlord).

is that right?

 

[BruceB]

You ought to be able to insert the pv in the 3 phase section after the main meter (if there is one) and before all the single phase take-offs. More difficult if the supplier provides all the meters.

 

[Noddy67]

Is that the nub (sp?) of it.

If the landlord gets three phases, gets charged by the DNO and then sells on each tenants part (more likely renting tenants) then I can find three phases which the landlord will have access to. to use.

If on the other hand the three phases comes in, each tenant (more likely owners) has their own agreement with the electricity company then the landlord is only going to get one phase for their own communal use.

is that it? So I need to undertstand the metering arrangments?

Regards and thanks

 

[BruceB]

Yes that is it. If they are all separate single phase supplies direct from the electricity supplier then the landlord could ask for his meter to be changed to a 3 phase one which will give you what you need.