© 2011 SunPower Corporation
© 2012 SunPower Corporation
Competitiveness & Economics
17th October 2012
A hybrid case study
Luis Fariza Navarro
© 2012 SunPower Corporation
Powering a new concept: PV Hybrid solution
Finding the good energy mix
© 2012 SunPower Corporation
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Value Added of Solar Energy
OIL PRICE VARIATIONS
Sun is immediate and unlimited source of energy
Sun delivers the equivalent 10,000 times the world energy consumption
Reliably predictable source of energy (statistical database) compared to other green power supplies
Solar PV is time tested technology
Remote locations with difficult fuel delivery
Hazardous energy OPEX due to highly variant fuel price and fuel theft
States expectancies toward contribution of majors to the development of environmental consciousness
Source: Prixdubaril.com
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© 2012 SunPower Corporation
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Why a hybrid solar PV generator?
Mixing power sources to optimize energy according to a specific load profile and strong seasonal effect
Technical and economic optimum (peaks of load and strong seasonal effect)
Find an optimum LCOE on a bounded economic time
Hybrid system
100% solar PV100% diesel
generator + grid
CAPEX: ++
OPEX: - -
Lower LCOE @ ∞
CAPEX: - -
OPEX: ++
Higher LCOE @ t0
Hybrid solutions enable the revamping of existing power
sources with a global energy solution
4
© 2012 SunPower Corporation
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Why a hybrid solar PV generator?
Hybrid system
100% solar PV100% diesel
generator + grid
CAPEX: ++
OPEX: - -
Lower LCOE @ ∞
Hybrid solutions enable the revamping of existing power
sources with a global energy solution
5
CAPEX: - -
OPEX: ++
Higher LCOE @ t0
It: Investment expenditures in the year t.
Mt: Operation & Maintenance expenditures in the year t.
Ft: Fuel expenditures in the year t.
Et: Electricity generation in the year t.
r: Discount rate
n: Life of the system
LCOE
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Potential Sectors
Commercial
Industrial
Telecom
Hotel
Mine Industry
…
Hybrid solutions enable the revamping of existing power
sources with a global energy solution
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© 2012 SunPower Corporation
SunPower
Finding the right product
© 2012 SunPower Corporation
Why efficiency matters?
High efficiency More power per sqm
High efficiency panel Conventional efficiency panel
1
2
Maximise system size
High efficiency Lower installation, rent & maintenance cost per watt
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3 High efficiency Better LCOE !
© 2012 SunPower Corporation
More energy for more revenues in same roof space
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Yearly production simulation – Delhi, India, 1,500 m2 roof surface
213 kWp
760 multi-Si 280 Wp Panels
30° Fixed Tilt Racking System
239 kWp
920 mono-Si 260 Wp Panels
30° Fixed Tilt Racking System
298 kWp
910 SPR-327 Panels
30° Fixed Tilt Racking System
556 MWh
402 MWh349 MWh
Up to 160% more output
SunPower20.1%
Mono-Si16 %
Multi-Si14.4 %
© 2012 SunPower Corporation
More energy for more revenues in same roof space
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Yearly production simulation – Mumbai, India, 3,000 m2 roof surface
200 kWp
1386 Flexible Thin Film 144 Wp
Tilt 0°
478 kWp
1840 Conventional 260 Wp Panels
Tilt 0°
600 kWp
1836 SPR-327 laminates
Tilt 0°
909 MWh
663 MWh270 MWh
Up to 336% more output
SunPower20.1%
Conventional16 %
Membrane6.8 %
© 2012 SunPower Corporation
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Yearly production simulation – Mumbai, India, 3,000 m2 roof surface
281 kWp
3122 Thin Film 90 Wp
Tilt 0°
478 kWp
1840 Conventional 260 Wp Panels
Tilt 0°
600 kWp
1836 SPR-327 laminates
Tilt 0°
909 MWh
663 MWh411 MWh
Up to 221% more output
SunPower20.1%
Conventional16 %
Thin film10 %
More energy for more revenues in same roof space
© 2012 SunPower Corporation
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Conventional SunPower Rooftop 327W
PanelPanel
BOS
BOS
InstallationInstallation
Fixed Costs
Fixed Costs
Co
sts
/Wa
tt
Higher efficiency = lower CAPEX + lower OPEX Better LCOE
Why efficiency matters?
© 2012 SunPower Corporation
Hybrid systems
Case study
© 2012 SunPower Corporation
Existing architecture
AC
Building loads
Building AC
Distribution box
Energy flowBackup
switch
Diesel Generator back up
No energy transferred to the grid
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© 2012 SunPower Corporation
Case study assumptions
Building
Type of building : Commercial building – food retailer
Max Connected Load : 100 KW (lighting/ fan/ air conditioners…)
Main power Supply : Grid supply
Back-up Supply : Diesel Engine (no UPS / no batteries)
Diesel generator type : Kohler / SDMO J130K
Roof Area : 1000 sqm
Location : Delhi
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Electrical data
Grid availability : 16 hours/ day
Backup generation : 5 hours/day
PV generator size : 91 KWp
Economic data
Grid tariff : 6 Rs/kWh
Diesel tariff : 50 Rs/litre
Fuel Inflation : 7% per year
Grid Inflation : 5% per year
Man-hour inflation : 10% per year
Actualisation rate : 10% per year
0.000
0.050
0.100
0.150
0.200
0.250
0.300
0.0% 20.0% 40.0% 60.0% 80.0% 100.0%Genset Power (P/Pnom)
Fuel Consumption [L/kVA/h]
© 2012 SunPower Corporation
Proposed architecture
AC
Building loads
Building AC
Distribution box
Energy flowBackup
switch
Grid
Inverter
Power control
monitoring
DC
91 kWp
Pure auto-consumption generator
No energy transferred to the grid or the generator set
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© 2012 SunPower Corporation
Load Vs Production profiles
1 – PV production during main power cut-off (generator set is running)
2 - PV production during normal operation (generator set is off)
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© 2012 SunPower Corporation
-0.50
0.00
0.50
1.00
1.50
2.00
2.50
3.00
3.50
4.00
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
Millio
ns $
Cumulated Saving NPV ($) w/o PV Cumulated cost ($) Cumulated cost w PV ($)
Case study outputs
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Payback without
actualisation
Payback with
actualisation
© 2012 SunPower Corporation
Thank you!
Questions?
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