CONFIDENTIAL ©2019 | Duke Energy | Page 1

Load Balancing and Energy Storage

2019 Southeast Hydrogen & Fuel Cell Symposium

CONFIDENTIAL ©2019 | Duke Energy | Page 2

U.S. Energy Storage Annual Deployments Increasing Rapidly

Source: Wood Mackenzie

CONFIDENTIAL ©2019 | Duke Energy | Page 3

Why Is Duke Interested In Energy Storage Technology?

POWER

ENERGY

CONFIDENTIAL ©2019 | Duke Energy | Page 4

Integrated resource plans call for 375 MW of grid-connected

energy storage across regulated territories in the next 5 years.

Duke Energy Indiana:

• 10 MW approved as “Clean Energy Projects” ; Flexibility and Reliability / Resiliency

Duke Energy Ohio:

• 10 MW pilot filed in Electric Security Plan (Reliability, Resiliency)

Duke Energy Kentucky:

• 2 MW year over year to 2018 Integrated Resource Plan

Duke Energy Florida

• 50 MW pilot approved by FPUC in 2017

• 22MW of projects across Duke Energy regulated territory announced to date

Duke Energy Carolinas/Duke

Energy Progress:

• 290 MW in the Carolinas

Integrated Resource Plan

(including Western

Modernization projects)

Announced to Date:

• 95 kWh Mt. Sterling

Microgrid (commissioned

in 2017)

Western Modernization Plan

• 4 MW Hot Springs (+3

MW solar) Micro-grid

• 9 MW AVL Rock Hill

• Flexibility, Capacity and

Reliability / Resiliency

Jennings

Trento

n

Cape San

Blas

CONFIDENTIAL ©2019 | Duke Energy | Page 5

Providing Backup for Critical Infrastructure & Bulk System

Benefits

Camp Atterbury Micro-grid – DEI (Under

Construction): Through a partnership with the Indiana

Army National Guard, Duke Energy Indiana will deploy

energy storage (and solar) at Camp Atterbury.

Project goals:

1. Provide system benefits (frequency regulation in

MISO) for all Indiana customers

2. Provide solar generation for Indiana customers

3. Operate a safe and resilient Microgrid for Camp Atterbury

Technology footprint:

• 2 MWdc Solar PV Facility & 5 MW Lithium Battery

In Service: Late 2019/Early 2020

➢ Critical customers want solar + storage onsite that provide grid benefits during

normal operations and back up power during an outage.

➢ Customer Segments: Cities (emergency services), Military, Universities, Hospitals,

C&I (i.e. Amazon)

CONFIDENTIAL ©2019 | Duke Energy | Page 6

What’s Next?: Capture New Value Streams

Storage as a

peaking resource

Storage as

generation

enhancement

CONFIDENTIAL ©2019 | Duke Energy | Page 7

What’s Next: Utilize New Technologies

2017 2026

ENGAGESTAKEHOLDERS

MODERNIZE

THEENERGY

GRID

GENERATECLEANER

ENERGY

EXPAND NATURAL GAS

INFRASTRUCTURE

TRANSFORM

THECUSTOMER

EXPERIENCE

2050

ATTAINNET-ZERO

CARBON

EMISSIONS

BY 2050

8