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Southampton City Council & Future Solent
Solar PV Programme 2016 - 20Invest 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 800+ 900+ 1100
Generation
30 kWp 70 kWp
SAP kWh 24000 56000PV Syst kWh 27000 63000PV SOL kWh 30000 70000
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
ParkviewRSH
HospitalCivic Centre
Southampton Solent
University
Skandia Life
DeVereHotel
Quays
West QuayThe Heat Station
IKEA
Carnival
ABP
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 2012 - 2016
Changes to Renewable Energy – Doctor Alan Whitehead MP
www.energy.soton.ac.uk
Energy and Climate Change Division – www.energy.soton.ac.uk 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 – www.energy.soton.ac.uk 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 networkSolar irradiation
Socio-economic statistics
Building / LiDAR 3D data
City open spaces
Satellite imageBase map
Southampton - Energy PotentialSolar Photovoltaic (PV)
Energy and Climate Change Division – www.energy.soton.ac.uk Prof A S Bahaj : Southampton Solar City: Assessment of Solar Energy Potential from City Buildings
MWh
Non domestic
Appropriate areas for PVResults 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: oFacing South (-45 to 45, 0°being due south).oAppropriate inclination (between 0°and 60°).oNot shaded (annual radiation >800 kWh/m²).oEconomically applicable: larger than 8 m² .
Solar radiation for Southampton
Radiation received by roofs
PV Applicable areas
MWh
Domestic
Energy and Climate Change Division – www.energy.soton.ac.uk Prof A S Bahaj : Southampton Solar City: Assessment of Solar Energy Potential from City Buildings
Citywide solar PV capacity
Domestic Non-domestic TOTAL
MW MW MW
Small (<3kW) 43 21 64Medium (3 - 15 kW) 62 33 96Large (>15 kW) 16 83 99
sub total 121 137 258
City power production – Solar PV
Annual electricity productionoTotal 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 roofFlat roof
DomesticNon-domestic
Energy and Climate Change Division – www.energy.soton.ac.uk 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 FiTScenario 2 = 1.63p/kWh DECC changeScenario 3 = no FiT, export tariff only
= 2.43p/kWh Depends on availability of export metre!
kWp Current Proposed %
≤ 4 12.47 1.6387%
04 - 10 11.3 1.6386%
10 - 50 11.3 3.6967%
50 - 150 9.63 2.6473%
150 - 250 9.21 2.6471%
250 - 1000 5.94 2.2862%
1000 - 5000
5.94 1.0383%
Energy and Climate Change Division – www.energy.soton.ac.uk 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 kW4 – 10 kW<4 kW
Non-domestic
>500 kW
200 – 500 kW
100 – 200 kW50 – 100 kW10 – 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: £ 15 589 per year
Wyndham Court•Number of households: 185•Number of council properties: 84•Installation capacity: 84 kW•Generation: 262 MWh/year•Feed-in tariff: £ 15 589 per year
Energy and Climate Change Division – www.energy.soton.ac.uk Prof A S Bahaj : Southampton Solar City: Assessment of Solar Energy Potential from City Buildings
Building distribution & subsidy reductiono To encourage “well-sited”, medium scale projects, PV systems of 10-50 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
kWp Current Proposed %
≤ 4 12.47 1.6387%
04 - 10 11.3 1.6386%
10 - 50 11.3 3.6967%
50 - 150 9.63 2.6473%
150 - 250 9.21 2.6471%
250 - 1000 5.94 2.2862%
1000 - 5000
5.94 1.0383%
Energy and Climate Change Division – www.energy.soton.ac.uk 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 reductiono Significant income from avoided electricity import, at 16.07 p/kWh
(domestic) & 10.20 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 – www.energy.soton.ac.uk 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 – www.energy.soton.ac.uk Prof A S Bahaj : Southampton Solar City: Assessment of Solar Energy Potential from City Buildings
Income without avoided import
Impact of subsidy reductiono 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 – www.energy.soton.ac.uk 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 resultso 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?
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