Contents

• Project Scope

• Origins of the Program

• BESS Introduction

• Engineering Scope & Progress

• Project Timelines

• Challenges Experienced

1

Project Scope

• Installation of 1440MWh distributed battery storage

• Translates to roughly 90 sites of a average 4MW each; sites range from 1MW to 40MW

• BESS, AC LV & MV equipment, P+C, upstream telecoms, M&O

• DERMS … integration into DMS

• APM Tool … end of life management

2

Origins of the Program

KIWANO CSP

100MW CSP (KIWANO)

GROUND-BREAKING STORAGE

GENERATION AND STORAGE:

60%*100MW*24h = 1440MWh per day

TOWER

TROUGHDISH, TROUGH OR TOWER

TECHNOLOGY

3

Origins of the Program

4

PREFERRED

BESS Introduction

“The battery will kill fossil fuels … it’s only a matter of time” by Mark Chediak, Bloomberg Magazine, March 2018

5

BESS Introduction

The global energy storage market will double six times between 2016 and 2030, rising to a total of 125 gigawatts/305 gigawatt-hours. US$1B will be invested in this time.Bloomberg New Energy Finance, Nov 2017

6

7

BESS Introduction

Energy Storage Trends & Opportunities, IFC Report (Source: Navigant Research) 8

BESS Introduction

FRAUNHOFER ISE

9

BESS Introduction

BESS Introduction

Electropaedia10

BESS Introduction

11

12

BESS Introduction

Engineering Scope & Progress

• Sites identification - use case, business case

• Network studies due diligence

• Concept designs per site – layout, 1-line, P+C

• BESS specification

• MV equipment specification

• DERMS and APM specifications

• Bid Documents

• Costing and estimation

• Commissioning 13

Project Timelines

• Schedule subject to internal Eskom approvals and external approvals by DFIs and statutory bodies (DEA, etc)– Ph1 Bid Documents Finalisation 2018 Nov

– Ph1 Enquiry Issued 2019 Q1

– Ph1 Enquiry Closes, Evaluated and Awarded 2019 Q2

– Ph1 Construction 2019 Q3-Q4

– Ph1 Test & Commissioning 2019 Q4

– Ph2 Enquiry Issued 2019 Q3

– Ph2 Enquiry Closes, Evaluated and Awarded 2020 Q1

– Ph2 Construction 2020 Q1-Q2

– Ph2 Test & Commissioning 2020 Q314

Challenges Experienced

• Developing a decent BESS specification

• Knowledge and skills for network studies

• Defining Use Case and Business Case

• Compilation of Bid Documents- Evaluation Criteria

- Schedules

- Internal Change Management (capacity guarantees, O&M, etc)

• Statutory Approvals – EAs and land rights 15

END