Solar Renewables

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Solar Renewables Information Evening 11 th May 2011

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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. - PowerPoint PPT Presentation

Transcript of Solar Renewables

  • Solar RenewablesInformation Evening

    11th May 2011

  • AgendaWelcomeMuswell Hill Sustainability Group Overview of Solar Electricity (PV)Overview of Solar ThermalOur Low Carbon Buying Group SchemeA householders experienceQ & A Informal chats with installers and suppliers

  • Muswell Hill Sustainability GroupEstablished in 2008Now 110 membersGoal is to reduce carbon emissions and waste in Muswell Hill and surrounding areasCommunity Energy Projects (through our social enterprise en10ergy)Partner in Low Carbon ZoneHouseholder projects eg 100 Homes, Bulk Buying Schemes

  • Energy Efficiency First!Dont waste the energy you generateMake sure youve insulated your home as much as possible, you have energy-efficient appliances and bulbs, and that you Switch Off

  • Solar PV cell typesMonoPolyHybrid

    Cell typeEfficiencyApprox area per KW (m2)Embedded Energy (payback years)Monocrystalline13-17%6-82Polycrystalline11-15%7-91.5Hybrid17%+5-61.5

  • Solar PV system componentsAn inverter

  • System efficiencies

  • Installation considerationsRoof should be in reasonable state of repairRoof must be strong enough (should not be an issue in most local houses)Installation is straightforward normally takes 1-2 daysMinimal maintenance required panels self-clean and rarely fail

  • 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).

  • How does it work?Generators earn:

    1. Generation tariff a fixedpayment for every kWhgenerated.

    2. Export tariff additionalpayment for every kWhexported to grid.

    3. On site benefit of free electricity

  • Tariff LevelsGeneration Tariff: 41.3p/kWh for PV systems of less than 4kWp (around 20 panels)In context on average we pay 13p/kWh to importExport tariff 3p/kWhNote Ofgem forecasting significant electricity price rises over next 10 years

  • A worked exampleTotal electricity demand of house = 4000kWh/yearTotal generation (1,700kWh)Onsite use (850kWh)2kWp solar PV Generating UnitIncome 700110 savedExport (850kWh)Income 26Remember they stillhave to import3150kWhTotal benefit 836 per year

  • Tariff StructurePayments at least every three monthsIndex linked to RPIIncome generated through FITs are tax free for domestic customers onlyIn general ownership of payments belong to property holder not individuals e.g. person sells property FITs stays with property

  • Tariff structure continuedDegression - 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 costsExample:

    Year 1Year 2Year 3Year 4PV

  • FinancingIf you have access to capital, then use it (e.g. currently in an ISA or building society)Loans e.g. Zopa.comFree 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

  • Solar Thermal

  • How does solar thermal work?Evacuated tubesFlat plates

  • How does solar thermal work continued

  • Installation considerationsRoof 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: Youll need either a larger twin coil cylinder, or a dedicated cylinder with a solar heating coilBoiler: 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.

  • Factors effecting efficiencyPitch & Orientation (tubes can be tilted)Pipe losses (all pipes should be well-insulated)Dedicated hot water storageCorrect sizing of collectorsExpect to obtain around 1/3 to of your hot water needs

  • Renewable Heat IncentiveIn March 2011 the Government announced two phases of rollout of RHI to domestic customersPhase 1 RHI Premium Payment. Expected to be around 300 one-off payment for solar thermal for well-insulated houses onlyPhase 2 Long term tariffs (like FIT) will be introduced alongside the Green Deal in October 2012

  • Planning considerationsPermitted Development: UnlessPanels 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 developmentIf your property is a listed building installation then you will require an application for listed building consent, even where planning permission is not needed.

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

  • Low Carbon Buying Group

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

  • Indicative Pricing

    Costs are indicative

    Revenue based on South-facing roof

    InstallationPanelsCostRevenueSolar PV 1.3kWp system76000518Solar PV 1.7kWp system97,400677Solar PV 2.1kWp128,800837Solar Thermal4,500RHI to be confirmed

  • How the Buying Group worksYou need to be a member of MHSG cost 10 (free if youre in the Low Carbon zone)Quote your MHSG membership number when you contact installers for a surveyIf you install solar renewables through the scheme we may ask you to complete a short questionnaire concerning the installationInstallers 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

  • Thank you!