SuperHome Database

Scotland , Glenrothes, MacTaggart Way

House Summary

Shirley and George Paterson

House Type:
1989 single storey bungalow, converted and extended in 2009

Carbon saving:
64% - Remote Assessed  

Reported saving on bills:

  • Scotland , Glenrothes, MacTaggart Way

Measures installed:

  • Condensing boiler
  • Double Glazing
  • Draught-proofing
  • Electric Car Charging point
  • Floor Insulation
  • Loft Insulation
  • Low Energy Appliances
  • Low Energy Lighting
  • Solar PV Panels
  • Solar Water Heating

Upcoming events

Early interest in Open Days encourages SuperHome owners to host more events. If you'd like to visit this property please contact the owner and let them know. SuperHomers are often happy to respond to questions about their refurbishment project by email between times. Please read ‘more on contacting this SuperHomer’ before you make contact.

Personal story:

This home is owned by George, who has been employed for 18 years in the engineering development and sale of batteries for electric vehicles, and Shirley, who has been so inspired by the benefits of the changes made to their own property, that she chose to leave her career in Human Resources and to re-train as an Energy Assessor.  She is a Domestic Energy Assessor who produces Energy Performance Certificates, and also a Green Deal Adviser who produces Green Deal Advice Reports (which also include an EPC), and which help customers access significant financial incentives in Scotland (interest-free loans and grants) as well as the Domestic Renewable Heat Incentive and Feed-In Tariff schemes.


To share learning

To inspire others to also make home improvements, and to embrace technologies, which in turn significantly reduce reliance on grid supplied fuels and reduce energy bills.

Promoting the linking of properties with on-site electricity-generating technologies as today’s fuel stations for transport.

Shirley’s business is called “nextGenergy” – its strapline is “technology turning around your energy bill” – inspired by what she has achieved at home.

Also see:
Property background:

1989 single storey 4-bedroomed bungalow, converted to a room-in-roof bungalow in 2009 – now has 10 heated habitable rooms (living room, sitting room, dining room, kitchen, 4 bedrooms, office, gym).

The key improvements made to achieve such a significant total energy and car fuel bill reduction of 42% (comparing 2016 outgoings with 2011 – excluding any incentive income received from the Solar PV Feed-In Tariff) has been Solar Photovoltaic Panels and an Energy Monitor with an In Home Display (a decision-making tool), Electric Cars and a choice of different speeds of Car Charging Infrastructure to smartly make best use of on-site generated electricity.

Key changes made:

Solar pv, chargepoint infrastructure x 4, 3 electric vehicles

Full details of measures installed:

Underfloor insulation, low energy lighting, room in roof insulation, double glazing, 3.92kw (16 panels) solar photovoltaic panels, solar pv monitor with in home display, boiler energy management system with weather compensating occupancy-based advanced heating controls, condensing mains gas boiler, smart water heating management system, insulated 250-litre hot water tank with immersion, smart solar pv diverter for water heating (collects data too), 3 mixer showers, export meter to measure unused solar generation leaving property and exporting to the national grid, electric car charging meter, 2 x 100% electric cars each with 22 kWhs of energy storage in their batteries, 1 x plug-in hybrid electric car with 12 kWhs of energy storage in its battery, 7 kw chargepoint, 3.5 kw chargepoint, 2 external 13 amp sockets also for electric car charging.

Measures installed in detail:

  • Solar PV
  • Electric Vehicle Charging Points x 4
  • Solar PV Diverter Device / free Water Heating
  • Boiler Energy Management System/Managed Hot Water
  • Renewable/Grid Electricity Monitor/In Home Display
  • Floor Insulation
  • Roof Insulation
  • Condensing Boiler
  • Double Glazing
  • Low Energy Lighting
  • Low Energy Appliances
  • Electric Cars x 3 partly fuelled by Renewable Energy
  • Smart Plugs make use of available Renewable Energy
Benefits of work carried out:

Total energy and fuel bill in 2011 was £6,672.

This has reduced by 42% to £3,840.

Net electricity and gas bill (after receipt of feed-in tariff), is now £190 per year + £35 per week for petrol for plug-in hybrid electric vehicle – so approximately 2/7th of energy costs of 5 years ago.   It has worked out very well to invest in technology, to do this hard work (energy-saving and money-saving for us), to live more sustainably, and to do what we can at this stage to future-proof ourselves against rising fuel and energy costs.

Annual review of grid electricity and gas tariff – every year since 2011, succeeded in securing a lower p/kWh tariff for each energy despite us being in a general period of increasing prices.   I encourage all customers to regularly review their energy tariffs.

Favourite feature:

Electric cars and their link to the on-site generation of electricity by our solar panels.  The average kWhs per year being generated is 3,572 – which is roughly equivalent to 14,000 miles of car fuel!

Car fuel is our priority use of our on-site generated electricity, however any surplus solar pv-generated energy can be used automatically for the heating of water or to power appliances we have plugged into 3 smart plugs.

We have metered the amount of our surplus energy. We have been unable to use 100% of our solar-pv generated energy in the past year – some weeks we did use as much as 98% of what was available, however the average over the past 12 months has been 93.5% use.  We are challenging ourselves to now tweek behaviours, and by the end of the next 12 months, our usage rate may be even higher.

I record data weekly – I have been doing so since the solar pv feed-in tariff for new installations of solar panels reduced significantly early in 2016 – in order to help others understand what solar panels can still be doing, despite the lower feed-in tariff incentive.   Putting our generation figures into a spreadsheet, together with our use of grid electricity, the surplus the automatic water heating has made use of, the kWhs the car charging has used, the miles we’ve driven for that amount, our tariffs, our Feed-In Tariff rate – we have excellent data.   I have also used this same data to show what investing in solar panels today would mean if the utilisation rates were the same – it’s incredulous what this is averaging at.   The average daily cost of electricity is around £2 to run 3 cars as we are doing, our house and office – that’s an example with the tariff available from current feed-in tariff available for newly installed solar pv system. The pence per mile rate is averaging at 4p even if this were all fuelled by grid electricity!

Business name:


Business overview:

nextGenergy energy assesses homes in Scotland, producing Energy Performance Certificates listing recommended energy-saving improvement measures.

nextGenergy’s installation support service assists with the implementation of recommended improvements eg Solar Photovoltaic Panels, Air/Ground Source Heat Pumps, Biomass Boilers, Gas/Oil/LPG Condensing Boilers, Heating Controls, Insulations, Low Energy Lighting, modern Secondary Glazing ideal for Listed Properties and those in Conservation Areas. nextGenergy also supports car chargepoint installations and supply of electric vehicles.

Another reporting option from nextGenergy is a more detailed Advice Report providing valuable data on priority energy-saving measures to achieve the largest energy bill savings. To produce these, data required from owners includes: current energy bill tariffs, heating programming data, appliances in use, and occupants’ hot water use.

nextGenergy advises on current government incentives.

Contact this homeowner

Assessment types

SuperHomes Assessed

A home that has been visited and assessed by us and confirmed as reaching the SuperHome standard, which demonstrates a 60% carbon saving.

Homeowner Reported

Information has been provided by the homeowner about their home and energy use prior to the installation of measures and following their installation which demonstrates a carbon saving. This information has not been verified.

Remote Assessed

The homeowner has provided information on their home including what measures have been installed which has enables an assessor working on our behalf to assess their carbon savings. This home has not been visited to verify the measures installed.


This home has not been assessed, but the homeowner has reported what measures have been installed. It may be that this home is awaiting assessment.