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Topic Title: PV Installation
Topic Summary: Correctly wired?
Created On: 28 July 2013 06:27 PM
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 28 July 2013 06:27 PM
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Grounded

Posts: 336
Joined: 29 November 2005

I have to admit I know nothing about PV systems, I have seen them around but have never got involved. But I would have thought, in a domestic situation, the PV system would be supplied from the consumer side of the supply meter.
I have come across one which is wired from the supply side of the meter. It is a 'rent a roof' installation where the home owner is supposed to be able to use any solar generated power for free, while the excess will be exported, with the 'rent a roof' company getting the FIT. (Presumably calculated from the meter in the PV installation)
I can't see how it's possible for the home owner to get any 'free' generated power, as everything used is metered from the import/supply meter.
Can anyone shed any light?
 28 July 2013 06:52 PM
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WalkersWiring

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I was under the impression that to interfere with the tails between the cut out & the meter was an offence, as this is DNO equipment. I have done a few PV installations myself, subcontracting for another company, and the set up you describe doesn't sound right...

-------------------------
Regards -

Jerry

The bitterness of poor quality lasts long after the sweetness of a cheap price...
 28 July 2013 08:45 PM
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DOUGIE1000

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Definetly not right, get them bback

-------------------------
Dougie
Power Plus Electrical.co.uk

My mission is to live as long as possible......so far so good!
 29 July 2013 08:44 AM
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ectophile

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Agreed - that's wrong. The PV should be connected to the consumer's side of the meter, with a second PV meter between the consumer unit and the inverter.

-------------------------
S P Barker BSc PhD MIET
 29 July 2013 12:43 PM
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Grounded

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Thanks for your replies. Has anyone heard of this happening before? It would seem that the home owner has been cheated out of any free solar energy for the past two years and is due some compensation at the very least.
 29 July 2013 09:45 PM
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clansman

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There maybe some confusion here, that you should check.

When the PV was installed the installer shouldn't have touched the DNO meter and tails, however he would have installed a 'generation Meter' to record the amount of power the PV has generated.

The output from the inverter should be connected to the supplier side of the generation meter (usually left hand side).

You sure you're not looking at the generation meter rather than the DNO meter?
 31 July 2013 05:19 PM
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Grounded

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This is how it's connected.
[URL=http://s932.photobucket.com/user/Josef_Theodore/media/solarpanelinstall-2.jpg.html][/URL]

Sorry, try this one.

Edited: 31 July 2013 at 06:15 PM by Grounded
 31 July 2013 06:08 PM
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WalkersWiring

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That link doesn't appear to be working for me...

-------------------------
Regards -

Jerry

The bitterness of poor quality lasts long after the sweetness of a cheap price...
 31 July 2013 11:31 PM
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DOUGIE1000

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As said, no not correct, contact installer.

-------------------------
Dougie
Power Plus Electrical.co.uk

My mission is to live as long as possible......so far so good!
 01 August 2013 10:45 AM
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Patnik

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With it connected correctly that old style supplier meter will be spinning backwards when PV generation exceeds demand - a sort of DIY rebate
 01 August 2013 01:19 PM
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ectophile

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Originally posted by: Patnik

With it connected correctly that old style supplier meter will be spinning backwards when PV generation exceeds demand - a sort of DIY rebate


That depends on the meter. I have one of the old spinning disc meters, but it doesn't go backwards. Well, not normally, but I did catch it going backwards once!

My meter has a little ratchet symbol on the faceplate to indicate that it won't go backwards.

-------------------------
S P Barker BSc PhD MIET
 01 August 2013 04:00 PM
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perspicacious

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"It would seem that the home owner has been cheated out of any free solar energy for the past two years and is due some compensation at the very least."

I thought that PV installers had be be MCS accredited and by virtue of that, have at least some basic knowledge as to how to connect?

Notwithstanding that, I'd advise the home owner to contact the MCS scheme and get a complaint form from them, having first taken many photographs of the meter positions connections......

Regards

BOD
 01 August 2013 06:19 PM
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bajb

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I would be astonished if the MCS scheme will do anything at all at this stage. They will tell the individual to :
- first, make a complaint to the firm that installed it as they are required to have a complaints process and various consumer protection measures and processes in place;
- second, if the first does not get satisfactory resolution to make a complaint to the firm's registration body (ie NIC/NAPIT/ECA etc)
 01 August 2013 07:59 PM
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paulskyrme

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Why do we see so many incorrectly installed solar pv systems in domestic premises?
 01 August 2013 08:12 PM
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OMS

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Originally posted by: paulskyrme

Why do we see so many incorrectly installed solar pv systems in domestic premises?


Cost, Cost and Ohh - Cost

Regards

OMS

-------------------------
Failure is always an option
 01 August 2013 08:55 PM
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paulskyrme

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Cost or muppets OMS?
Or,is this one in the same?...
 01 August 2013 08:58 PM
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Avatar for OMS.
OMS

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Just about - to pay for the John Cooper S mini of the salesman, you need to pay peanuts to the electrician and for that you get muppets doing the install (although I did like the Muppet show)

Regards

OMS

-------------------------
Failure is always an option
 02 August 2013 01:42 PM
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AJJewsbury

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That depends on the meter. I have one of the old spinning disc meters, but it doesn't go backwards. Well, not normally, but I did catch it going backwards once!

My meter has a little ratchet symbol on the faceplate to indicate that it won't go backwards.

I've seen mine do the same - it looks like it'll rotate backwards by anything up to one rotation before the ratchet stops it.

- Andy.
 02 August 2013 09:20 PM
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DOUGIE1000

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Yes that's correct the ratchet type ones won't spin backwards. Easy fix though, ........step one cut the seals, step two open the meter...... step three....

-------------------------
Dougie
Power Plus Electrical.co.uk

My mission is to live as long as possible......so far so good!
 05 August 2013 05:01 PM
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Grounded

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Thanks guys, I'll let you know what happens.
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