CPS ENERGY’S FLEXIBLE PATHDISTRIBUTED ENERGY RESOURCES

Presented by: James Boston

B Y T H E N U M B E R S

# Largest Municipally Owned Electric and Gas Utility in the U.S.Solar Power Production in Texas; Seventh in the Nation Most Trusted Brand in the South Region by MSIWind Power Production in Texas

Years of ServingSan Antonio

AA+

Premier Credit Rating

822k 347kOur Customers

Electric

Gas

$11B - Assets $2.6B - Annual Revenue$ $350M annual payment to

City of San Antonio$

MARKET DISRUPTION

IN ACTION!

WHY FLEXIBILITY MATTERS?

• Predictable customer load• Predictable customer growth• Consistent generation levels

Traditional(Historical)

40+ Year Baseload AssetsTraditional Power Plants

Flexible(Future)

• Energy Efficiencyo Equipment using less energyo Declining use per customer

• More Potential for Renewableso Intermittency in generationo Renewables serving off-peak hours

• New technologies on the horizon

Need Ability to AdaptFlexible Generation Path

WHAT ARE WE DOING?

• Installation of over 500MW of solar – PPA• Customer Program Offerings

– Solar Host Program– Customer Rebates– Community Solar

• Smart Grid Infrastructure

Solara  110 MW

Pearl  50 MW (Under Construction)

Sirius  110 MW(In Testing)

Helios 95 MWEclipse 40 MW

CPS ENERGY RENEWABLE INSTALLAT IONS

Sinkin 1&2 20 MWSomerset 11 MW

Alamo 1 40 MW

Alamo 2 ‐ 4.4 MW

Alamo 3 ‐ 5.5 MW

Blue Wing14 MWSweetwater 3 & 4 341 MW

Desert Sky 1 & 2  161 MW

Cedro Hill 150 MW

Los Vientos 200 MW

Penascal 77 MW

Papalote Creek  130 MW

Community 1 MW

Ivory 50 MW

8

Solar ProgramsSimply Solar

Solar Rebates14.8K customers

Roofless Solar 245 solar owners

SolarHostSA592 rooftops

Three ways for customers to participate in solar

SOLAR+STORAGE PROJECT

5 MW AC Solar PV Facility 10 MW Battery Storage System

• Energy Storage System (ESS) co-located with solar production

• Application: Solar shifting and Fast Responding Regulation Service (FRRS)

• Flexible configuration

• 10 MW FRRS with 1 hour duration

• 5 MW stored energy with 2 hour duration

PV+BESS PARTNERSHIP

• SwRI ‐ Research Opportunities

• CPS Energy – Renewable Energy, Reduced Emissions, Operational Experience, Flexible Path

• Both parties – Community Recognition, Data Sharing

SOLAR LAYOUT

Highly visible site located along the Highway 151 corridor

PV+BESS PARTNERSHIP

NEW TECHNOLOGY IMPLEMENTATION GRANT (NTIG)

• Improve the quality of air in Texas

• Facilitate the implementation of new technologies to reduce emissions

• Fund implementation of new technologies while creating new business and industry

CPS Energy was awarded $3M to partially offset the ESS cost

LESSONS LEARNED

• CPS Energy formed a cross‐functional Technical Advisory Team– Direct Buried Cable– Communication Access– Resource Meter– Switchgear – Resiliency– String Inverter

STRING INVERTER

• Technical team approved use of string inverters in centralized design

• Benefits:• O&M does not require specialized 

training. Inverter can easily be sent back to factory for repair/replacement

• Higher energy production due to (1) increased flexibility for design optimization (2) more inverters (more MPPTs) reduce losses from partial site shading

Thank You..

James BostonManager, Market IntelligenceOffice: 210.353.3157Mobile: 210.416.9306