Green Building Forum - Non domestic PV - Is export metered or deemed at 50% as domestic?

Green Building Forum - Non domestic PV - Is export metered or deemed at 50% as domestic? Sun, 31 May 2026 06:01:52 +0100 https://www.greenbuildingforum.co.uk/newforum/ Lussumo Vanilla 1.0.3 Non domestic PV - Is export metered or deemed at 50% as domestic? https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8751&Focus=138397#Comment_138397 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8751&Focus=138397#Comment_138397 Tue, 06 Mar 2012 15:59:48 +0000 Nick Parsons Non domestic PV - Is export metered or deemed at 50% as domestic? https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8751&Focus=138403#Comment_138403 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8751&Focus=138403#Comment_138403 Tue, 06 Mar 2012 16:58:14 +0000 jamesingram Non domestic PV - Is export metered or deemed at 50% as domestic? https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8751&Focus=138405#Comment_138405 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8751&Focus=138405#Comment_138405 Tue, 06 Mar 2012 17:01:48 +0000 candlemaker Non domestic PV - Is export metered or deemed at 50% as domestic? https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8751&Focus=138411#Comment_138411 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8751&Focus=138411#Comment_138411 Tue, 06 Mar 2012 18:09:02 +0000 ted
Deeming is 50% for everything apart from hydro where it is 75%.

These figures are all laid down by DECC.

A point usually missed in payback calculations is that these figures can be changed at any time. Once SmartMeters are rolled out the deeming should disappear.]]> Non domestic PV - Is export metered or deemed at 50% as domestic? https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8751&Focus=138413#Comment_138413 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8751&Focus=138413#Comment_138413 Tue, 06 Mar 2012 18:11:50 +0000 skyewright

Posted By: candlemakerI was told that it is pretty much an ad-hoc set up and if you are on the 50% rule then that's better for the user so not to worry!

Surely that depends on how much of the generated electricity "the user" is actually exporting?

A disadvantage in not having an export meter is that it becomes harder to monitor your energy usage (as opposed to import), because there are two unknowns in the equation:

usage = import + generation - export

However some organisations seem to want crazy money for fitting (and "maintaining") an export meter, so that's a factor too.]]> Non domestic PV - Is export metered or deemed at 50% as domestic? https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8751&Focus=138415#Comment_138415 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8751&Focus=138415#Comment_138415 Tue, 06 Mar 2012 18:24:00 +0000 Nick Parsons Non domestic PV - Is export metered or deemed at 50% as domestic? https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8751&Focus=138417#Comment_138417 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8751&Focus=138417#Comment_138417 Tue, 06 Mar 2012 18:51:51 +0000 ted Non domestic PV - Is export metered or deemed at 50% as domestic? https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8751&Focus=138419#Comment_138419 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8751&Focus=138419#Comment_138419 Tue, 06 Mar 2012 19:04:25 +0000 windy lamb Turns out we export nearly 90% of our generation so we would be giving SSE 40% of generation without an export meter. No wonder they will no longer fit export meters on systems below 30kW!]]> Non domestic PV - Is export metered or deemed at 50% as domestic? https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8751&Focus=138420#Comment_138420 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8751&Focus=138420#Comment_138420 Tue, 06 Mar 2012 19:04:57 +0000 SteamyTea Posted By: tedA point usually missed in payback calculations is that these figures can be changed at any time.
What a surprise. It was quite clear at the very beginning that they had the right to change the scheme as they (the government) felt fit.
And that is what they will do, little by little.]]> Non domestic PV - Is export metered or deemed at 50% as domestic? https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8751&Focus=138443#Comment_138443 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8751&Focus=138443#Comment_138443 Tue, 06 Mar 2012 20:49:05 +0000 pmusgrove Non domestic PV - Is export metered or deemed at 50% as domestic? https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8751&Focus=141260#Comment_141260 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8751&Focus=141260#Comment_141260 Sat, 31 Mar 2012 20:50:43 +0100 CornwallSolar Does anyone know if they're being rolled out for commecial installations too? or just domestic.

www.cornwallsolarpanels.co.uk]]> Non domestic PV - Is export metered or deemed at 50% as domestic? https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8751&Focus=141308#Comment_141308 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8751&Focus=141308#Comment_141308 Sun, 01 Apr 2012 12:10:33 +0100 SteveZ )

50% Deemed Export My 4kW PV system exports more than 50% of production, based on a couple of months running. When I get a few more figures, I'll sit down and work out whether to ask about having an export meter fitted (or installing a stored DHW water system with an immersion heater). I suspect it won't be worth it.]]>