Sun, 19 Apr 2026 05:05:49 +0100 https://www.greenbuildingforum.co.uk/newforum/ Lussumo Vanilla 1.0.3 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9794&Focus=199088#Comment_199088 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9794&Focus=199088#Comment_199088 Fri, 28 Mar 2014 11:56:08 +0000 Mikel
Nov 18.6 kWh
Dec 23.2 kWh
Jan 23.5 kWh
Feb 16.4 kWh
Mar 13.4 kWh

Our GSHP daily electricity usage

Jan 10.6 kWh
Feb 10.1 kWh
Mar 8.7 kWh

Our PV daily generation data

Nov 4.1 kWh
Dec 2.2 kWh
Jan 2.9 kWh
Feb 6.7 kWh
Mar 9.4 kWh

We had on average 4-5 days away in each of Jan, Feb ad Mar so those figures would need increasing by about 20%.
I've not added any solar thermal data but since the middle of February we have not had to use the heat pump or immersion heater much at all.

Worth quoting these figures per sq. m? or per capital invested?]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9794&Focus=199091#Comment_199091 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9794&Focus=199091#Comment_199091 Fri, 28 Mar 2014 12:13:00 +0000 SteamyTea Posted By: MikelWorth quoting these figures per sq. m? or per capital invested?Tricky one that, should really be against all measures. But I have a total liveable area of 56 m^2, so my usage (for the last 5 weeks) is 0.32 kWh/(m^2.day) of which 0.24 is heating and water.

Your Heatpump seems to use a lot of electricity.]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9794&Focus=199099#Comment_199099 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9794&Focus=199099#Comment_199099 Fri, 28 Mar 2014 13:30:03 +0000 Mikel
Feb: total 0.11 kWh per sq m, heating and hot water 0.07 kWh per sq m
Mar: total 0.09 kWh per sq.m, heating and hot water 0.06 kWh per sq.m

First year's annual electricity consumption 4629 kWh with the heat pump
Previous year's electricity consumption 2553 kWh
So the heat pump seems to have added about 2000 kWh to the electricity consumption and that has replaced, together with the solar thermal, around 1300-1500 litres of heating. Estimated annual saving of around £400-500.

Our initial results for the measured COP for the heat pump is coming in around 3.2 with hopes that this cane be increased to 3.3-3.4

"Your Heatpump seems to use a lot of electricity."

And there I was feeling rather pleased with all this!]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9794&Focus=199101#Comment_199101 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9794&Focus=199101#Comment_199101 Fri, 28 Mar 2014 13:41:13 +0000 SteamyTea https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9794&Focus=199113#Comment_199113 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9794&Focus=199113#Comment_199113 Fri, 28 Mar 2014 15:12:30 +0000 Mikel