Dr Beyers Naudé SSEG Program

Investor Presentation - Nano-Grid Options Overview

PV + BESS Nano-Grid

10,000 units

Annual Cost Avoidance

R75.8M

R7,576/unit

20-Year Total Avoidance

R1.52B

PV Only Nano-Grid

10,000 units

Annual Cost Avoidance

R12.9M

R1,294/unit

20-Year Total Avoidance

R258.4M

BESS Only Nano-Grid

12,000 units

Annual Cost Avoidance

R83.5M

R6,960/unit

20-Year Total Avoidance

R1.67B

PV + BESS Nano-Grid

3kWp PV + 10kWh BESS hybrid system

Fleet Size

10,000

Annual Savings

R75.8M

20-Year Total Savings

R1.52B

PV Only Nano-Grid

3kWp PV solar generation system

Fleet Size

10,000

Annual Savings

R12.9M

20-Year Total Savings

R258.4M

BESS Only Nano-Grid

10kWh Battery energy storage system

Fleet Size

12,000

Annual Savings

R83.5M

20-Year Total Savings

R1.67B

Dr Beyers Naudé Local Municipality - Annual Consumption Profile

Total Annual Consumption

71.6 GWh

71,600,000 kWh/year

Peak Period (19%)

13.57 GWh

@ R3.635/kWh avg

Standard Period (51%)

36.52 GWh

@ R1.5376/kWh avg

Off-Peak Period (30%)

21.48 GWh

@ R1.08/kWh avg

High-Demand Season (June - August)

Winter Peak Period - Maximum Arbitrage Opportunity

Peak

07:00-10:00 & 18:00-20:00

R6.47/kWh

Standard

06:00-07:00, 10:00-18:00, 20:00-22:00

R1.6186/kWh

Off-Peak

22:00-06:00, Weekends & Holidays

R1.08/kWh

Low-Demand Season (September - May)

Standard Period

Peak

07:00-10:00 & 18:00-20:00

R2.69/kWh

Standard

06:00-07:00, 10:00-18:00, 20:00-22:00

R1.5107/kWh

Off-Peak

22:00-06:00, Weekends & Holidays

R1.08/kWh

Eskom Municflex - Local Authority Tariff Reference

2025/2026 Tariffs and Charges Booklet - Page 14

Eskom Municflex Local Authority Tariff Table 2025/2026 showing active energy charges for different transmission zones and voltage levels

Highlighted Row: >900km Transmission Zone, ≥66kV & ≤132kV voltage level - This is the applicable tariff category for Dr Beyers Naudé Local Municipality bulk supply.

Key Investment Highlights

6x Price Differential

Winter peak vs off-peak (R6.47 vs R1.08)

BESS Arbitrage

Charge off-peak, discharge peak

PV Generation

Peak sun hours align with standard tariff

Grid-Tied Systems

Export excess, reduce bulk demand