PV working well generating around 9300 kW hrs annually from 9.8kW installation . 80ETs (solar thermal) on garage roof feeding into 800 L thermal store. Currently producing temperatures of above 80 degrees in the tank. A bespoke energy. Anagement system with several sensors monitors ambient temperature in slab, living areas etc and controls the low energy pumps. Both system installed by SolarSense in Bristol who I can strongly recommend. A Stormsaver rainwater harvest system takes rid water from the arm to a 5000L tank which supplies the toilets.
90% of the lighting is 3 and 7w JCC Integral LEDs which
produce excellent light and are guaranteed for 10yrs.
This means the house is negative energy over the course of the year. Building you own passive slab is not as difficult as it may seem and much cheaper than calling in German, Irish or Scandinavian installers. Hemcrete is a trickier product to use and an be difficult if installer in heavy rain like we had last June.