Confused on exprt metering illustration

[snoopdog]

Dear all I wonder if you can help please:-

I have a customer on a farm who has 3 x 5 total 15Kw of wind turbines installed foc by wind crop, I am assumining windcrop claim the deemed export rate of 50% of the wind FIT meter reading.

The customer has now been in touch with me as he would like to install 27Kwp of PV on his grain Barn purchasing the system.

I am confused about whats best for the customer as he has got a very small electrical load I assume there are two possibilites :-

A) is he allowed to go for the deemed export option of 50% of his PV FIT meter reading as he is less than 30Kw of PV, bearing in mind he has 15Kw of Wind.

B) If an export meter is fitted at the origin surely it will be measuring some of the exported wind generation units as well as the exported PV generation units ?

If any one has addressed this scenario or has some solutions it would be greatly appriciated.

Thanks in anticipation

 

[TedM]

The 30kW limit for deeming applies to an 'Eligible Installation". Different technologies on the same site are treated as separate eligible installations so there should be no legislative issues with getting separate deemed export payments for wind and PV below 30kW each.

You will need to get estimates for the admin costs of having an export meter for the PV and then see if it is financially worthwhile to meter it.

 

[snoopdog]

The 30kW limit for deeming applies to an 'Eligible Installation". Different technologies on the same site are treated as separate eligible installations so there should be no legislative issues with getting separate deemed export payments for wind and PV below 30kW each.

You will need to get estimates for the admin costs of having an export meter for the PV and then see if it is financially worthwhile to meter it.

Hi Ted thanks for the advice,

I am i correct in thinking there is a cost for the export meter to be fitted together with an annual service charge for the export meter.

If you had a rough guide from previous experiences that would be helpful

 

[Worcester]

£400 to £600 a year is not uncommon, they tend to want Half Hourly Metering for that size...

 

[TedM]

The annual admin should only apply of you have a HH meter, which shouldn't be required below 30kW.

The main issue will be the positioning of the meter so that it only measures the site export from the PV. I can't see how this would happen without something similar to the Immersun which can differentiate loads. You may even need something specially designed.

The easiest route might to get the owners of the wind turbine to agree to having an export meter fitted and then pro-rate the export between them and your customer based on generation of the PV and wind.

You need to cope with each of these conditions correctly:

	House load	Wind gen	PV gen		Import	Export
case 1	10	0	0		10	0
case 2	10	5	5		0	0
case 3	10	10	0		0	0
case 4	10	0	10		0	0
case 5	10	3	3		4	0
case 6	10	5	15		0	10
case 7	10	15	5		0	10
case 8	10	15	15		0	20

In these last 3 cases you would need to know how much export was attributable to the wind and how much to the pv. With agreement from the wind turbine owners you could get around this and just measure total export simply.

 

[Worcester]

Apologies, TedM's correct I was thinking of >30kW