Hi,
I am new to this forum and have found the very educative discussion here.
I am contemplating to have a net metering system installed and have tried to do some numbers on economic vialbilty.
Would some of the moer experienced users here perhaps cast an eye and comment and/or answer some questions?
Installers Gesolar
http://www.gesolarcyprus.com/en/solutio ... oggle-id-2have published the following data suggesting them to describe a typical yield for a 3kw/h installation:
Production
Jan 353
Feb 307
Mar 400
Apr 461
May 459
Jun 464
Jul 473
Aug 462
Sep 508
Ocz 457
Npv 376
Dez 290
5010
My bi-monthly billing period ends between 11th and 15th February. I have assumed this to be the cut-off date for
Solar carry-forward also (is that correct in the light of the recent EAC “decision”??).
With a bit of smoothing to make production-periods match billing – periods I have then compared solar yield
to our historic power consumption (all in kw/h):
Period ending Billed Expected Excess Carry To be
consumption Production forward paid for
16.4 1341 840 -501 -501 501
11.6 728 844 116 116
12.8 586 952 366 482
13.10 476 983 507 989
10.12 908 732 -176 813
11.2 1853 649 -1204 -391 391
5892 5000 892
The outcome is not surprising: For three billing period there is not enough production to cover our consumption.
Whilst the autumn deficit (billed mid-December) the carry forward from earlier months suffices to compensate,
For the billing periods ending in February and April we would still have to pay. In total we would have to pay for @ 900kw/h
Instead of @ 5900. On the back of an envelope this suggests an annual saving of @800€ compared to a capital outlay of
more than €5000.
One potential supplier proposed to increase the size of the installation to 4kwp. Numbers done in the same fashion would leave us
short 220 kw/h in spring (period ending mid-April) whilst the summerly carry forwards would leave us almost 1000kw/h in surplus (and effectively economically wasted) in mid-February.
However, the post by PW in Polemi dated 1/1 gives me some hope: He quotes EAC as saying:
“the final clearing of surplus electricity of Net Metering Producers/Consumers (Prosumers) as carried out by EAC, is February-March every year”
I currently do not have such a billing period. Mine are mid-Dec to mid-Feb and mid-Feb-mid-AprApr. Does anyone one whether these periods can be changed in the process of
applying for net metering? Because then much of the mid-Apr deficit would be covered by the excess carry forward from mid-Feb?
Maybe a 3.5 kwp installation would then be sort of viable.
Two questions remain though.
I have not been able to obtain a satisfactory answer in respect of permissions required. Of course EAC needs to agree and test. However: Is a planning/building permit required since
Photovoltaics change the appearance of a building? And also: is agreement from neigborurs required? We have a small house in a small development (all “villas”or “attached”) with
Every unit with is own title deed. Will I need permission from other owners since a possible installation may have an impact on their views?
And then: Electricity tariffs are about to change. Read more on
https://www.eac.com.cy/EN/EAC/NewsAndAn ... 0Study.pdf The new system will in a first step do away with “layered” charges and apply a uniform tariff per kw/h. In a second step we will face the
Installation of STOD meters (under this metering system your usage will be split into different times of the day and different months throughout the year) with the most expensive times being daytime in summer (!) I now wonder whether really any own usage (in the house) of solar electricity is taken off before a surplus is metered and credited or whether in reality all solar electricity
is being fed into the grid and only netted off against all power used in the same period. In the latter case economics would change substantially, I believe.
Many thanks in advance
For checking/comparing my data and providing advice/answers.
Peter