Dorset Greener Homes

25 Sep - 3 Oct 2021

Solar PV House, Weymouth

Energy-saving improvements

  • 'Big' insulation works
    'Big' insulation works
  • Glazing
    Glazing
  • High spec heating
    High spec heating
  • Renewables: electricity
    Renewables: electricity
  • Water management
    Water management
  • Recommended
    Recommended

Location

3 Cassiobury Road
Weymouth
Dorset
DT4 7JN

View on map

Opening times

25 Sep - 3 Oct 2021
Saturday 2nd October
Tours at 10.30. 12.00, 2.00, 3,30
Parking in Carlton Road South (unlimited) and Avenue Road and Cassiobury Road (1hr).

Just turn up Tours

Solar PV House is a conversion of a mid-terraced Victorian home, and the addition of a full width loft conversion and a three story extension at the back, clad in metal with flexible PV panels. The house was previously a cannabis factory and when Jason and Janne bought it the house was in semi-derelict condition. 

Jason writes: "the changes we made were:

  •  Insulation to internal walls, new flat roofs, living room slab and the raised ground floor.
  • Insulated wooden loft and rear bedroom structure clad in standing seam steel and rubber EPDM (Building Regs. 2016)
  • Removed the gas supply.
  • Installed double glazing including south facing glass 'curtain' for passive solar heating in winter and passive stack cooling in summer with electric skylight at top of stairwell.
  • Installed a 350L thermal store heated by a 6.4KW building integrated PV system with east, south, west arrays. The PV is thin film CIGS ( copper indium gallium selenide) stuck to standing seam steel walls and EPDM (synthetic rubber) flat roof covering.
  • Far infrared underfloor downstairs and ceiling mounted panels in upper floor rooms.
  • Tesla Powerwall 2 battery.
  • Small 5KW wood stove connected to the thermal store which burns primarily coffee logs and sawdust briquettes from a local joinery factory. Burning coffee logs gives off fewer emissions than wood, burns hotter and stops coffee grounds going to landfill where they give off methane which is twenty-five times more harmful than CO2.
  • All LED lighting, AAA domestic devices and electric induction hob.
  • Side return extension green roof.
  • Rainwater irrigation of garden borders for growing.
  • 98% recycled shed from leftover wood offcuts with rainwater capture to large butt.
  • 6 large palms were already in place and were retained with the addition of a new wildflower meadow lawn and wildflower and sedum green roof over the living area.
  • The demolition of the internal spaces and walls involved careful recycling and re-use of materials where possible (e.g. bricks).

The effect of this conversion, apart from the extra room, has been measured by Jason. Comparing it to other houses:

Energy Comparison
Victorian terraces 421.5 kWh/m2/year approx.
Passive retrofit in Kensal Rise London 15 kWh/m2/year
Superhomes (Energy Saving Trust) 104 kWh/m2/year
UK average according to Superhomes 177 kWh/m2/year
SolarPVHouse (predicted) 53 kWh/m2/year (recorded over period) 73-86 kWh/m2/year (likely adjusted actual) 65 kWh/m2/year

Carbon Comparison
Superhomes 60% reduction to qualify
SolarPVHouse Co2 Emissions Reduction Over 75% (maybe just under 100% as all electric renewable and as mentioned the stove burns 50% coffee logs which reduce methane emissions from landfill)

SolarPVHouse Co2 Emissions Rate 7.51 Kg/Co2/m2/year 

 Website: https://solarpvhouse.com

Facebook Page: https://www.facebook.com/solarpvhouse

Published Papers: https://committees.parliament.uk/writtenevidence/36190/html/

Fun Timelapse Video (which could be shared where you need it): https://www.youtube.com/watch?v=GjvfRIW2mj8

 

Additional information

(PDF, 80kB)

Location

3 Cassiobury Road
Weymouth
Dorset
DT4 7JN

View on map

Opening times

25 Sep - 3 Oct 2021
Saturday 2nd October
Tours at 10.30. 12.00, 2.00, 3,30
Parking in Carlton Road South (unlimited) and Avenue Road and Cassiobury Road (1hr).

Just turn up Tours

Other homes nearby

Part of the Green Open Homes network