This document outlines a presentation on on-site renewables given by Dr. Mike Pedley. It discusses the economics of on-site renewables including electricity prices, technology costs, and subsidies. It then provides brief overviews of various renewable technologies like solar PV, wind, hydro, and anaerobic digestion. The presentation emphasizes combining multiple renewables and using storage to increase flexibility. It also discusses commercial arrangements and maintaining the viability of on-site renewables.
2. Agenda
Introductions
Economics for on site renewables
Costs, benefits and subsidies (or lack of them)
Technologies
Single technologies e.g. Solar PV, Wind, Hydro, AD
Multi-renewables
Storage & flexibility
Commercial arrangements & options
3. Solar PV
Wind
Hydro
Anaerobic
Digestion
On Site Renewables: Introduction
4. On Site Renewables: Introduction
Generation supplied “behind the meter”
…or behind the substation
Usually connected to load by private network
Grid Private (i.e. on-site)
7. Economics: Costs
Wind and Solar costs falling
e.g. BEIS Solar PV
e.g. IRENA (International Renewable Energy Association)
2015-2025 forecasts
Offshore wind -35% £/MWh
Solar PV – 59% £/MWh
Hydro & AD: static or rising
…very dependent upon site
400
500
600
700
800
900
1000
1100
1200
1300
1400
2013 2014 2015 2016 2017
Solar PV Costs (4-50kW)
£/kW
Source: BEIS
8. Economics: Subsidies
ROCs: closed (to new entrants)
Feed in Tariff’s: going…
…but not yet gone (end 31/3/19)
NB Quotas full for Wind >100kW & standalone PV
RHI (Renewable Heat Incentive): available for biogas (i.e. AD)
FiT tariffs (p/kWh)
To 31
Mar 19 2011
Solar PV < 50 kW (EPC D or better) 4.03 32.9
Solar PV 50 - 249 kW (EPC D or better) 1.69 30.7
Wind < 50 kW 8.24 25.3
Wind 50 - 99 kW 4.87 19.7
Hydro < 100 kW 8.03 18.7
Hydro 100 - 1999 kW 6.46 11.5
AD < 250 kW 4.50 14.0
AD 250-499 kW 4.27 13.0
9. Solar PV
Quick to consent & install
Low maintenance
Costs falling
Viable if there is an on site load (& economies of scale &/or storage)
10. Wind
Slow (& risky) to develop
Costs falling
Economic without subsidy
depending on scale & load
11. Hydro
Well established (150+ years!)
Long life & low maintenance (& compact)
Energy recovery options
E.g. Pump-As-Turbine
Economics vary hugely
– assess case by case
17. Commercials & Options
Self invest or 3rd party funded?
Maintenance & Asset life
Build or Acquire?
Private wire PPAs
Private (i.e. on-site)
18. On site Renewables:
Are they still worth the effort?
‘Matching’ technology & generation to load
Flexibility enhances value
Subsidy opportunities may still be available
…for Feed in Tariffs sites must be live by 31 March 2019
Consider alternative commercial arrangements
FiT tariffs (p/kWh)
To 31
Mar 19 2011
Solar PV < 50 kW (EPC D or better) 4.03 32.9
Solar PV 50 - 249 kW (EPC D or better) 1.69 30.7
Wind < 50 kW 8.24 25.3
Wind 50 - 99 kW 4.87 19.7
Hydro < 100 kW 8.03 18.7
Hydro 100 - 1999 kW 6.46 11.5
AD < 250 kW 4.50 14.0
AD 250-499 kW 4.27 13.0
-80.00
-60.00
-40.00
-20.00
0.00
20.00
40.00
60.00
80.00
100.00
0:30
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5:00
6:30
8:00
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Half Hourly system prices: 28 Jul 2018
£/MWh