September 19, 20215 yr Given all the covid delays, and the fact that I finally got done two electrical storage updates this month (on- and off- grid), I now want to reschedule my heat battery plans for Feb/Mar/Apr next year: https://www.earth.org.uk/note-on-solar-DHW-for-16WW-UniQ-and-PV-diversion.html Any suggestions as to who might be happy to do an install etc? I'd probably ask Sunamp for a unit with stats available (if such a thing is possible) so that I can integrate it better with the rest of my storage and monitoring. So I'd be a technically-savvy but inquisitive client needing schematics etc! Rgds Damon
October 11, 20215 yr Author Ha! One step in the right direction! I had the Combimate fitted today (within a couple of hours of the package arriving!): https://www.earth.org.uk/note-on-solar-DHW-for-16WW-UniQ-and-PV-diversion.html#2021-10-11 Rgds Damon
February 3, 20224 yr Author This has moved on another step: I now have the myenergi eddi and hub, and I've started writing some of the control software to allow top-up at low grid carbon intensities in the wee hours in the winter... https://www.earth.org.uk/note-on-solar-DHW-for-16WW-UniQ-and-PV-diversion.html#2022-01-26 and here is a live display of that top-up (there is also a log) which updates at least every 10 minutes: https://www.earth.org.uk/_heat-battery-target.html Rgds Damon
February 6, 20224 yr Author I have now preconfigured my eddi (the sparks is not due for a couple of weeks) and have regular logging set up: https://www.earth.org.uk/note-on-solar-DHW-for-16WW-UniQ-and-PV-diversion.html#2022-02-06 Rgds Damon
March 10, 20224 yr Author Our Thermino 150 ePV went in yesterday. https://www.earth.org.uk/note-on-solar-DHW-for-16WW-UniQ-and-PV-diversion.html#2022-03-09 This evening after dark, my daughter had a shower and my son had a bath. All but a fraction of a kWh of the DHW covered from the Thermino: the combi cut in for the last couple of minutes of the bath fill. Since we also turned our central heating off the day before, I'm hoping that our gas consumption will be much much less than usual this month onwards, at least until circa September. Rgds Damon
March 11, 20224 yr 10 hours ago, DamonHD said: Our Thermino 150 ePV went in yesterday. Yesterdays technology, here is what is coming tomorrow. https://techxplore.com/news/2022-03-solution-thermal-energy-storage.html On a more serious note, do you know how much energy your house actually uses, once you take home generation into account. So imports + PV. Think I may turn of heating this weekend.
March 11, 20224 yr Author Yes, all energy flows recorded and analysed in excruciating detail, eg: https://www.earth.org.uk/saving-electricity-2022.html Without any of the storage or PV etc we'd be a low user for gas and electricity on Ofgem's scale. Rgds Damon
April 21, 20224 yr Author I'll get a better view at the end of April, but gas use is now about 0.5kWh/day, and will go lower if I can train my family not to whack the hot tap full on for 30s use (where hot water doesn't even get to the tap!)... https://www.earth.org.uk/note-on-solar-DHW-for-16WW-UniQ-and-PV-diversion.html#2022-04-11 Also these may be of interest: https://www.earth.org.uk/eddi-diverter-dataset.html https://www.earth.org.uk/heat-battery-topup-dataset.html Rgds Damon
April 21, 20224 yr 2 hours ago, DamonHD said: if I can train my family not to whack the hot tap full on for 30s Damon….it’s time to reevaluate
May 1, 20224 yr Author Gas use for the whole of April was just over 1m^3, so ~0.38kWh/day. Thus a 90% reduction in direct gas burn. Result. https://www.earth.org.uk/note-on-solar-DHW-for-16WW-UniQ-and-PV-diversion.html#2022-04-30 Rgds Damon
August 27, 20224 yr Author An update: trying to pick the best fixed export (spill-to-grid) margin for my solar PV diversion to a heat battery: https://www.earth.org.uk/eddi-diverter-export-margin-analysis.html Rgds Damon
February 14, 20242 yr Author Gas consumption for 2023 was down to 1275kWh, the lowest ever. Electricity imports were 1364kWh, exports were 1597kWh. There are 4 of us in this house, newly (Feb 2024) given an EPC A. Overall energy carbon footprint for energy is ~200kg for the year. https://www.earth.org.uk/saving-electricity-2023.html Rgds Damon Edited February 14, 20242 yr by DamonHD
January 2, 20251 yr Author Just finished my yearly CO2 calcs for electricity and gas, about +225kgCO2 for the year. I now hope to see this drift back to slightly negative as the grid gets greener, etc. https://www.earth.org.uk/saving-electricity-2024.html Edited January 2, 20251 yr by DamonHD
January 2, 20251 yr 3 hours ago, DamonHD said: Just finished my yearly CO2 calcs for electricity How did you calculate it, well more to the point, where did you get the CO2e data from. I could add a column to my spreadsheet.
January 2, 20251 yr Author I calculate the grid CO2 intensity and log it here: https://www.earth.org.uk/data/FUELINST/log/live/ and then combine it with exports/imports for each hour to compute the total. See the end of the page.
January 2, 20251 yr 18 minutes ago, DamonHD said: See the end of the page. OK Thanks. Just have to find time to sort it all.
February 22, 20251 yr Author Started work to reconnect the Thermino heat battery today: https://www.earth.org.uk/reconnecting-the-16WW-heat-battery.html
March 31, 20251 yr Author Filled up (as did all other energy storage) today for the first time this year... It's been a sunny March round these parts...
March 31, 20251 yr Yes we exported 26kWh today, frustrating waiting for the export MPAN number to come through after we commissioned the PV 3 weeks ago, then we can get our 15p per kWh!
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