CASE STUDY – 10.6 MW PV + storage at DeGrussa Mine

22-03-2016 – Andrew Drager

juwi at a Glance

Wind Energy

1,800 MW of installed capacity;

100 wind parks (840 turbines);

Solar Energy

1,700 MW of installed capacity;

1,500 PV Installations;

Company

1,000 employees worldwide;

$7 billion investment volume;

Top 3 largest solar EPC.

Consulting &

Acquisition Planning Development

Financing &

Sales Construction

Operations &

Service

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Our Renewable Energy Activities

Location: Arizona (USA) 25 MWp, single axis tracker, Ronneburg (Germany) 20 MWp,

Malaysia 10MWp Carport, Oiniades (Greece) 3MW

3,500 MWp renewable energy completed worldwide

Global leader in Off-Grid Projects

Off-grid Projects: Rwanda, Chile, Namibia, Egypt, Germany

Sandfire Project: Site

Degrussa Mine:

Mining: Gold and copper

Location: Doolgunna Region, WA

Customer: Sandfire Resources NL

Distance: 900 km North of Perth

Power Supply:

Diesel Generators: 19MW

Operator: KPS

Avg. load: ~ 11MW

Avg. consumption: ~ 100GWh p.a.

Sandfire Project: The Solution

Hybrid Power Plant:

PV-Modules: 10.6 MWp

Tracking: East-West tracking

PV-Inverter: 10 MW

Storage: 4 MW / 1,8 MWh (6 MW peak)

Builder / Operator: juwi Australia

Sandfire Project: Integration

Design:

Juwi simulation software (Pvhyb).

Solar/diesel control system:

Maintain minimal partial load of gensets;

Prevents reverse power;

Diesel-off mode.

Solar/diesel control system:

Spinning reserve;

Ramp rate control;

Provide frequency support;

Power factor correction.

Sandfire Project: The Corp Structure

Project SPV

ARENA

Equity

Genset Owner

Debt

EPC Contractor

Offtaker O&M contractor

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Mining:

Challenge:

Perceived technical risks (loss of mine production);

Non-core business drain on time and money;

Cost savings are not material;

Little technical understanding of renewable energy.

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System Cost:

Challenge:

Substantial engineering design process;

Additional equipment (battery, inverters etc.);

Installation costs (labor, transport etc.);

Remote operation and maintenance.

Electricity Cost

PV vs Diesel Cost

Time Today

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Financing:

Challenge:

Higher risk (potential for a stranded asset);

Renewable energy experience;

Guarantee's;

Due diligence requirements.

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Solar PV Production:

Challenge:

Soiling losses in dusty region with heavy equipment;

Solar curtailment due to constrained grid;

Longevity of equipment in harsh conditions.

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Benefits:

Reduction in power costs:

Cheaper than Oil, Gas and/or the Grid

(subject to supply term);

Reduced exposure to power price rises:

Fossil fuel market prices;

Transport;

Exchange rate;

Current & future cost of CO2.

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Benefits:

Technical Benefits

Energy security;

Improved power quality;

Better monitoring analysis;

Employee energy consciousness.

Social License

Sustainability image;

Local employment;

Increased marketing/recognition.

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The Result:

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The Result

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The Result

Thank You.

Andrew Drager

Managing Directror - Australia-South Pacific

juwi Renewable Energies Pty Ltd

Level 1, 33 Queen St.

Brisbane Qld 4000

Tel. +61 7 3194 5052

Mob. +61 408 729 258

andrew.drager@juwi.com

www.juwi.com