Rushmoor Climate Community Presentation by David Hogg, 3rd December 2025 скачать в хорошем качестве

Rushmoor Climate Community Presentation by David Hogg, 3rd December 2025

SCROLL DOWN FOR MORE INFORMATION AND AN ERROR CORRECTION! This is a ~2 hour presentation I gave to the Rushmoor Climate Community Meeting, detailing how I upgraded my 1990s house over the course of 6 years, adding two sets of solar panels, a battery and a heat pump. At the time of giving this presentation, I had 10 months of cost and energy consumption data from our house, and at this point it looked like we we might make it through 12 months with an average utility bill of £0 (not including charging our two EVs). I will probably be giving a short update to the group next year once I have a full 12 months of data to show. ••••••••••••• ERROR CORRECTION: On the slide titled "What does it cost to run?" I made some errors in my calculations for what our house would have cost to run on gas for the same 10-month period that I have electricity usage data for the heat pump. The new calculations below use the latest tariff figures for my home address based on Octopus' tariff comparison page: https://octopus.energy/tariffs/ These are: – 7p/kWh with a standing charge of 43.82p/day for off-peak Intelligent Octopus which is the cheapest tariff they offer and requires you to have an EV – 25.88p/kWh with a standing charge of 43.66p/day for Octopus' latest fixed electricity tariff that's the same 24/7 (this is the tariff most households would be on) – 5.57p/kWh for gas with a standing charge of 32.52p/day Taking the amount of heat generated (5983kWh) and dividing it by 0.80 (as according to Heat Geek, even the most efficient modern gas boilers are only around ~80% efficient across a whole year, even if they're quoted as ~90% efficient), then multiplying it by the cost of gas per unit of 5.57p/kWh, and then adding the standing charge of 32.52p/day multiplied by 10 months (10/12 * 365), we get a figure of £515 to heat the house with gas. Using off-peak electricity and the same logic as above, it comes to £257, and for standard-rate electricity it comes to £589. So for my setup, gas would still be a bit cheaper to heat the house than using standard-rate electricity, but the difference isn't nearly as marked when compared to my previous calculations. And if you can use a home energy storage battery to run the heat pump off 7p/kWh off-peak electricity as much as you can, then it would be much much cheaper to heat the house than using gas. In this video by the ​‪@EverythingElectricShow‬ where they interview Adam Chapman from ‪@HeatGeek‬ :    • Artificial Irrelevance? Or can AI enable b...   ... Adam says that if a heat pump system is 340% efficient (mine has worked out to be 339% so far), then the cost to run it using a standard electricity tariff should be parity with heating the house with gas. What tariff details they used for their calculations I'm not sure, but I'm inclined to trust their advice more than my calculations as they do this for a living! ••••••••••••• Here are the links I mentioned in the presentation: 🐙 Octopus Energy, who we buy our electricity from, and who also installed our heat pump https://octopus.energy 💰 Here's my £50 referral code if you decide to join Octopus (we will each get £50!): https://share.octopus.energy/quiet-ho... 💰 If you decide to have a heat pump installed by Octopus, you can also quote the following referral code and then we'll each get £100! 31274601 Everything Electric TECH – a fantastic, independent YouTube channel dedicated to showcasing the latest developments in renewable energy technology:    / @everythingelectricshow   Everything Electric CARS – sister (and original) channel to Everything Electric TECH, focusing solely on reviews of electrified ground transport (cars, vans, trucks, scooters, bikes, etc)    / @fullychargedshow   Heat Geek – a channel dedicated to demystifying heat pumps and making them understandable by the masses    / @heatgeek   If you'd like to ask me any questions, you can reach me on: [email protected]