Southampton City Council & Future Solent Solar PV Programme Invest to avoid rising energy prices and taxation Councillor Simon Letts – Leader of Southampton City Council

Southampton's Solar PV Programme What we wanted to do Our track record in delivering projects The strong evidence base – Prof Bahaj Bumps along the way – FiT reductions etc – Simon and Alan Some data showing the impacts The next steps and future opportunities

UK Solar Irradiation and Southampton Solar PV Yield Did you know? The amount of sunlight that hits the Earth’s surface in one hour is enough to power the entire world for a year. Solar irradiance is a measure of the suns power. Irradiance levels vary considerably at different times of the year, depending on the seasons, the weather and the time of day. Projected Yield SAP (Sheffield ) PV Syst Met Office Southampton Generatio n 30 kWp70 kWp SAPkWh PV SystkWh PV SOLkWh

Council’s track record of delivery Insulation programmes linked to fuel poverty and health A corporate solar PV programme (2010) Corporate and schools energy programme – (c£1.5 million demand reduction and energy performance projects) Schools investments (retrofit and new build) - Solar PV schemes Behaviour change programme Heating upgrades including renewable heat schemes District Energy schemes

Southampton Geothermal Heating Company, Southampton City Wide DE Scheme 70,000,000 kWh energy generated p.a. 11,000 tonnes CO2 saved p.a. Providing heat chilled water & electricity to 45+ commercial consumers 800+ residential consumers

Energy Efficiency in Action  Energy Efficiency in Action  Energy Efficiency in Action BBC TV Studio’s Parkview RSH Hospital Civic Centre Southampton Solent University Skandia Life DeVere Hotel Quays West Quay The Heat Station IKEA Carnival AB P

Council District Energy Schemes £16 million Weston scheme £25million Thornhill, Shirley, Millbrook Insulation and district heating Rooftop Solar Heating cost reductions of over 30% Nearly 2,000 homes from

Changes to Renewable Energy – Doctor Alan Whitehead MP

Energy and Climate Change Division – Prof A S Bahaj : Southampton Solar City: Assessment of Solar Energy Potential from City Buildings Professor AbuBakr S Bahaj – Chief Scientific Advisor SCC Energy and Climate Change Division & Sustainable Energy Research Group Faculty of Engineering and the Environment University of Southampton, Southampton, SO17 1BJ, United Kingdom Southampton Solar City: Assessment of Solar Energy Potential from City Buildings

Energy and Climate Change Division – Prof A S Bahaj : Southampton Solar City: Assessment of Solar Energy Potential from City Buildings o City mapping to provide support to Master Plan & carbon reduction targets. o Research approach centred on scenarios that reflects City needs, social acceptability and wellbeing. Transportation network Solar irradiation Socio-economic statistics Building / LiDAR 3D data City open spaces Satellite image Base map Southampton - Energy Potential Solar Photovoltaic (PV)

Energy and Climate Change Division – Prof A S Bahaj : Southampton Solar City: Assessment of Solar Energy Potential from City Buildings MWh Non domestic Appropriate areas for PV Results optimisation process filter out about 2/3 roof areas due to various obstacles (inappropriate slope, orientation, or areas being too small) An applicable roof area is defined as: o Facing South (-45 to 45, 0°being due south). o Appropriate inclination (between 0°and 60°). o Not shaded (annual radiation >800 kWh/m²). o Economically applicable: larger than 8 m². Solar radiation for Southampton Radiation received by roofs PV Applicable areas MWh Domestic

Energy and Climate Change Division – Prof A S Bahaj : Southampton Solar City: Assessment of Solar Energy Potential from City Buildings Citywide solar PV capacity DomesticNon-domesticTOTAL MW Small (<3kW) Medium ( kW) Large (>15 kW) sub total City power production – Solar PV Annual electricity production o Total 247 GWh/year.  Domestic: 120 GWh,  Non domestic: 127 GWh. o 2011 Southampton electricity consumption, 1015 GWh. o Solar photovoltaics electricity from roofs ~ 25% of city’s electricity needs. Pitch roof Flat roof Domestic Non-domestic

Energy and Climate Change Division – Prof A S Bahaj : Southampton Solar City: Assessment of Solar Energy Potential from City Buildings Analysis of current and future FiT Feed tariff (FiT) o DECC plans to further reduce FiT. o Export tariff remains unchanged, at 4.85 p/kWh. o Income from a PV systems will rely on FiT & export tariff, normally assume half of generation is exported. Scenario 1 = 12.47p/kWh current FiT Scenario 2 = 1.63p/kWh DECC change Scenario 3 = no FiT, export tariff only = 2.43p/kWh Depends on availability of export metre! kWpCurrentProposed % ≤ % % % % % % %

Energy and Climate Change Division – Prof A S Bahaj : Southampton Solar City: Assessment of Solar Energy Potential from City Buildings Building type, expected capacity & generation Southampton City Council buildings Domestic buildings >150 kW 100 – 150 kW 50 – 100 kW 10 – 50 kW 4 – 10 kW <4 kW Non-domestic >500 kW 200 – 500 kW 100 – 200 kW 50 – 100 kW 10 – 50 kW <10 kW Wyndham Court Number of households: 185 Number of council properties: 84 Installation capacity: 84 kW Generation: 262 MWh/year Feed-in tariff: £ per year Wyndham Court Number of households: 185 Number of council properties: 84 Installation capacity: 84 kW Generation: 262 MWh/year Feed-in tariff: £ per year

Energy and Climate Change Division – Prof A S Bahaj : Southampton Solar City: Assessment of Solar Energy Potential from City Buildings Building distribution & subsidy reduction o To encourage “well-sited”, medium scale projects, PV systems of kWp will receive highest subsidy. o Most council properties, both domestic & non-domestic, are in this band. Distribution of Council buildings in relation to different FiT bands after subsidy reduction Proposed FiT as a function installation bands kWpCurrentProposed % ≤ % % % % % % %

Energy and Climate Change Division – Prof A S Bahaj : Southampton Solar City: Assessment of Solar Energy Potential from City Buildings Income taking into account borrowing, FiT and 50% export of electricity Impact of subsidy and reduction o Significant income from avoided electricity import, at p/kWh (domestic) & p/kWh (non-domestic). Analysis assumes 50% export. o Payback period increased significantly due to FiT reduction, but still within 10 years as most building are within highest subsidy region. o Electricity price is likely to increase in the future, not considered here. ∞

Energy and Climate Change Division – Prof A S Bahaj : Southampton Solar City: Assessment of Solar Energy Potential from City Buildings Income with and without avoided import o Payback period will extend significantly if power is not consumed locally. o Investment may not paid off under certain scenarios. ∞ ∞∞ ∞ Impact of subsidy and reduction

Energy and Climate Change Division – Prof A S Bahaj : Southampton Solar City: Assessment of Solar Energy Potential from City Buildings Income without avoided import Impact of subsidy reduction o Payback period will extend significantly if without income from avoided electricity import. o Investment may not paid off under certain scenarios

Energy and Climate Change Division – Prof A S Bahaj : Southampton Solar City: Assessment of Solar Energy Potential from City Buildings Building PV potential and energy efficiency Online tool / database o Enable easy access to research results o Provide user-friendly platform for researchers, project managers, or people who want to know more about their homes. o Demonstrate the energy saving potential of Southampton, as well as Solent Region. PV potential of SCC properties EPC of Southampton homes

Conclusions and Next steps Scenarios to come –  Grid parity – rising electricity prices  Falling Panel prices – anti dumping  Alternative subsidy regimes The Council’s role  To aggregate and create scale  Identify development and delivery funding Please register an interest with us to take advantage of future opportunities

THANK YOU Let’s make solar work! Questions?