Companies used

Electrics upgrade: Lee Hayward (https://www.haywardelec.com/)
Charging point, solar and battery etc: Oval Renewables (https://ovalrenewables.com/)
Mixergy tank: MCS Heating and Plumbing (https://www.mcsheating.com/)
Insulation supply: Ecological Building Systems (https://www.ecologicalbuildingsystems.com/)
Windows, door: Eksalta (https://www.eksalta.co.uk/)
MVHR design & supply: Green Building Store (https://www.greenbuildingstore.co.uk/)
Electricity supply: Octopus (Referral code (share £100 credit): https://share.octopus.energy/night-birch-689)
Tariff: https://octopus.energy/smart/intelligent-octopus-go/

Products installed

Mixergy

Tank 210l slimline: https://mixergy.co.uk/mixergy-tank/
Solar PV Switch: https://mixergy.co.uk/news-and-insights/using-your-mixergy-tank-with-solar-pv/

Solar

Solaredge inverter 3.68kW single phase: https://www.solaredge.com/en/products/residential/pv-inverters/solaredge-home-wave-inverters
Solaredge diverter: https://www.solaredge.com/aus/products/smart-energy/solaredge-home-hot-water-controller
Solaredge battery: https://www.solaredge.com/en/products/residential/storage-and-backup/solaredge-home-battery-400v

Car charger

Zappi: https://www.myenergi.com/zappi-ev-charger/

Windows and door

MVHR

Unit: Zehnder Comfoair Q350: https://www.zehnder.co.uk/en/indoor-ventilation/product-showcase/zehnder-comfoair-q

Heating controls

Evohome: https://www.resideo.com/gb/en/solutions/home-comfort/evohome/

Energy meters

Eastron SDM120 RS485: https://www.eastroneurope.com/products/view/sdm120modbus

Waste water heat recovery

Recoup Easyfit: https://recoup.co.uk/products/easyfit/

Heat Pump

Heat Geek: https://www.heatgeek.com/
PCR Plumbers: https://pcrplumbers.com/
Heat Punk (heat loss calculation): https://heatpunk.co.uk/

Other resources

Under-floor insulation https://www.ecologicalbuildingsystems.com/post/best-practice-approach-insulating-suspended-timber-floors