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Solar Renewables

Solar Renewables. Information Evening 11 th May 2011. Agenda. Welcome Muswell Hill Sustainability Group Overview of Solar Electricity (PV) Overview of Solar Thermal Our Low Carbon Buying Group Scheme A householder’s experience Q & A Informal chats with installers and suppliers.

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Solar Renewables

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  1. Solar Renewables Information Evening 11th May 2011

  2. Agenda • Welcome • Muswell Hill Sustainability Group • Overview of Solar Electricity (PV) • Overview of Solar Thermal • Our Low Carbon Buying Group Scheme • A householder’s experience • Q & A • Informal chats with installers and suppliers

  3. Muswell Hill Sustainability Group • Established in 2008 • Now 110 members • Goal is to reduce carbon emissions and waste in Muswell Hill and surrounding areas • Community Energy Projects (through our social enterprise en10ergy) • Partner in Low Carbon Zone • Householder projects eg 100 Homes, Bulk Buying Schemes

  4. Energy Efficiency First! • Don’t waste the energy you generate • Make sure you’ve insulated your home as much as possible, you have energy-efficient appliances and bulbs, and that you Switch Off

  5. Solar PV – cell types Mono Poly Hybrid

  6. Solar PV system components An inverter

  7. System efficiencies

  8. Installation considerations • Roof should be in reasonable state of repair • Roof must be strong enough (should not be an issue in most local houses) • Installation is straightforward – normally takes 1-2 days • Minimal maintenance required – panels self-clean and rarely fail

  9. Feed-in-Tariffs (FITS) • Introduced on 1st April 2010 • Provides financial incentives for citizens, organisations and businesses to install electricity generating technologies such as solar electricity panels and wind turbines • Since April 2010 nearly 30,000 domestic installs of solar electricity, with 11,000 this year so far • Aims to bring costs down for solar installs • Tariffs to be reviewed April 2012 (recent review does not effect domestic solar).

  10. How does it work? Generators earn: 1. Generation tariff – a fixed payment for every kWh generated. 2. Export tariff – additional payment for every kWh exported to grid. 3. On site benefit of free electricity

  11. Tariff Levels • Generation Tariff: 41.3p/kWh for PV systems of less than 4kWp (around 20 panels) • In context on average we pay 13p/kWh to import • Export tariff – 3p/kWh • Note Ofgem forecasting significant electricity price rises over next 10 years

  12. A worked example Total electricity demand of house = 4000kWh/year Total generation (1,700kWh) Onsite use (850kWh) Income £700 £110 saved 2kWp solar PV Generating Unit Export (850kWh) Remember they still have to import Income £26 3150kWh Total benefit £836 per year

  13. Tariff Structure • Payments at least every three months • Index linked to RPI • Income generated through FITs are tax free for domestic customers only • In general ownership of payments belong to property holder not individuals e.g. person sells property FITs stays with property

  14. Tariff structure continued • Degression - Tariff level decreases each year for new entrants - Degression is postponed until 2012 - Due to be reviewed in 2013 - To reflect decrease in technology & installation costs • Example:

  15. Financing • If you have access to capital, then use it (e.g. currently in an ISA or building society) • Loans – e.g. Zopa.com • Free solar/rent-your-roof schemes – where panels installed for free, but financer takes FIT tariff. Make sure you have the option of buying your panels back

  16. Solar Thermal

  17. How does solar thermal work? Evacuated tubes Flat plates

  18. How does solar thermal work continued

  19. Installation considerations • Roof space/orientation? You'll need around 5 square metres of roof space which faces east to west through south and receives direct sunlight for the main part of the day.. • Hot water cylinder: You’ll need either a larger twin coil cylinder, or a dedicated cylinder with a solar heating coil • Boiler: Most conventional boiler and hot water cylinder systems are compatible with solar water heating. If your boiler is a combination boiler (combi) and you don't currently have a hot water tank then a solar hot water system may not be compatible.

  20. Factors effecting efficiency • Pitch & Orientation (tubes can be tilted) • Pipe losses (all pipes should be well-insulated) • Dedicated hot water storage • Correct sizing of collectors • Expect to obtain around 1/3 to ½ of your hot water needs

  21. Renewable Heat Incentive • In March 2011 the Government announced two phases of rollout of RHI to domestic customers • Phase 1 – RHI Premium Payment. Expected to be around £300 one-off payment for solar thermal for ‘well-insulated houses’ only • Phase 2 – Long term tariffs (like FIT) will be introduced alongside the Green Deal in October 2012

  22. Planning considerations • Permitted Development: Unless……… • Panels project more than 200mm from the roof or wall surface. • Wall mounted - if your property is in a conservation area, planning consent is required when panels are to be fitted on the principal or side elevation walls and they are visible from the highway. If panels are to be fitted to a building in your garden or grounds they should not be visible from the highway. • Roof mounted – if your property is in a conservation area, planning consent may be required if the panels are to be fitted on a roof facing or visible from the highway, otherwise permitted development • If your property is a listed building installation then you will require an application for listed building consent, even where planning permission is not needed.

  23. Building Regulations • Building Regulations may apply !!! • Ask the installer • Check with your LA Building Regulations officer

  24. Low Carbon Buying Group

  25. Low Carbon Buying Group • Launched by Muswell Hill Sustainability Group in November 2010 to obtain discounts on solar renewables • Working with 4 installers (Ecodomus, Engensa, Hatch Sustain and Southern Solar) all pre-vetted and references checked • Obtained 10-20% discounts for members of the buying group

  26. Indicative Pricing Costs are indicative Revenue based on South-facing roof

  27. How the Buying Group works • You need to be a member of MHSG – cost £10 (free if you’re in the Low Carbon zone) • Quote your MHSG membership number when you contact installers for a survey • If you install solar renewables through the scheme we may ask you to complete a short questionnaire concerning the installation • Installers will pay a fee of £100 to en10ergy for each solar pv system installed and £50 for each solar thermal install – this will be used on further carbon reduction projects and scheme administration

  28. Thank you!

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