Reducing Risk through Reliability: Providing Solar Trackers in Desert Conditions

Intersolar Middle East, Dubai

Tracking improves solar asset value

Solar trackers compared to fixed-tilt

Tracking increases the energy production of a solar system by nearly 20%

Energy values increase due to alignment with demand through broader generation curve

~20% increase in production

Project ROI is increased and project LCOE is reduced due to ~20% higher energy return for

only ~10% project CAPEX increase

+8-10% System CAPEX

+18-25% Power

GenerationTrackingFixed Tilt Afternoon

Demand Peak

ARRAY HAS INSTALLED +20,000 KILOMETERS OF TRACKERS

“Array has the most extensive track record of any PV tracker vendor.”

– Greentech Media Research, Global Tracker Landscape Report 2017

Dubai, UAE

Boston,USA

Vast experience provides timeless reliability

16,000+ MW Years of Operation

Array’s trackers operate flawlessly in desert-type conditions

• Low-latitude desert• Ambient temperatures up

to 46°C• Presence of dust• High UV exposure• Hot, dry summers very

similar to MENA desert climate

The vast majority of Array’s 7GW of operational capacity is in desert-like conditions in Southern California, Arizona, Nevada and Texas

Tested and Approved for Desert Environments

• IEC 62817 tracker certification• 480 hour test• Exposed the tracker to

fine dust • Cycled the temp -30 to

60 C while running • Confirmed - NO

operational change• Array has decades of

desert experience

Industrial-type motor; dust & UV-proof, no batteries

• Highest quality AC motor, industrial grade

• Only one motor per almost 1MW!• Sealed and lubricated for life• Double viton seals, enclosed to be

protected from UV• Extremely wide temperature range –

unlike battery-based technologies

The motor is the heart of your system!

Batteries in the Desert to Keep Your Asset Safe?

• Unlike Array, all other trackers rely on electrical stow

• Batteries are essential for other trackers to stow

• Charge capacity is greatly reduced above 40°C ambient

• Charging at temperatures below 0°C and above 50°C may cause damage

Mechanical wind mitigation; safe in any climate

Array’s unique wind management solution

• No reliance on temperature-sensitive batteries, no UPS

• Elimination of vulnerable communication chain (7 links!)

• Designed for full site wind speed at all tracker angles

• Not subject to torsional galloping

Why Array Technologies?

Thank you.

Martin MitscherDirector International Sales and Business Development, Array Technologies, Inc. mmitscher@arraytechinc.com

Pioneering role in tracker market dynamics

8%

72%

2006 2016

U.S. Single-axis tracking market share in ground-mount projects

[2016 data based on GTM Global Tracker Landscape Report 2016]

• Array pioneered the US utility market transition from fixed rack to single-axis tracking

• Lenders and asset owners needed to be convinced of tracker viability

• Primary concerns to address: Reliability, O&M, failure risk

• Primary target to achieve: Reduce LCOE

Challenges in transition fixed tracked

Optimize LCOE

Minimize Operational & Financial Risk

Maximize Asset Value

Our Experience. Your Advantage.

1991First Solar Powered Tracker with Battery Back-up

1985Wattsuncorporation founded

2006First Flexibly Linked Rotating Driveline Tracker

1992WattsunCorporation becomes Array Technologies, Inc.

1993First Active Closed-Loop Tracker Patent Issued

2008First Tracker Bankability Report

2002First Individual Row Driven Single-Axis Tracker

2015V3 Launch: • First Single Bolt

Module Clamp• First Zero Scheduled

Maintenance Tracker

• First Torsion Limiter Load Stabilizing Tracker

2016Array Introduces New v3 Features:• Flood-plain ready vertical

mount motor• 90 module rows for 1500V

systems• CAB integration

2017Array Introduces: • First Quick

Disconnect Driveline

• First 62° ROM Tracker

Venture into the Future of Tracking

Decreased install cost, time, and complexity

Accommodation of new PV module

technology

Optimized modular

building blocks

Monitoring and diagnostics

Robotic cleaning

What’s Next?

Extended environmental

range of operation (wind, snow,

corrosion, temperature)

Customized designs for

low-load environments

Unique, flexibly linked architecture

• Unique single-bolt clamp• Standard fasteners &

installation tools• Octagonal torque tube for

easy, robust connections

• Extreme terrain flexibility• Only 1 motor per ~1 MW• Proven, industrial-grade

components• Drivetrain lubricated and

sealed for life

• Flexibly linked, rotating driveline with articulating u-joints

• New: Quick release detachable driveline

200 × Lower Unscheduled O&M Cost

With Array:1 repair/year for 100 MW site, and far fewer truck rolls

With Decentralized Trackers:765 repairs/year (2 per day) for 100 MW site, and far more truck rolls

600 × fewer number of service hours

Based on 3rd party data from TÜV

7% Lower Scheduled Lifetime O&M Cost

Optimized solutions for vegetation management and module cleaning• 50% less frequent mowing due to higher module clearance • 6% less area to maintain due to higher module density – NO GAPS!• NEW! Quick disconnect driveline• Robotic module cleaner ready Zero scheduled tracker maintenance

Robotic module cleaner ready

Array = high density and no gaps, robotic cleaner compatible

Competitor tracker has gaps and protrusions throughout

Based on 3rd party data from TÜV

How Array Prevents Catastrophic Failure

Reliable Wind Design

• Designed for full site wind speed at all tracker angles

• Proven mechanical wind management vs. electrical stow with 7 complex links in the chain

• Mechanical wind management not subject to torsional galloping

Highest Structural Integrity

• 12 gauge steel, conservative torque tube spans under 8m long

• Octagonal torque tube – easy, robust connections not subject to fatigue like pin connections

• Robust design avoids stress and damage to modules related to torsional galloping

Best-in-class uptime

28 Years of Learning & Innovation

Only 150 for 100 MWFewest Failure Points

Zero Scheduled Maintenance for 30 Year Life

Our streamlined design is forged from decades of experience

Eliminate human error

99.99%Uptime*

Compare to decentralized tracker alternative which introduces a perpetual state of maintenance, reducing uptime and deteriorating performance.

*Data provided directly from an Array customer’s monitoring system, tracking a conglomerate of sites totaling +300 MW

7% Lower LCOE

CAPEX

Highest uptime in the industry delivers

maximum energy production

Production

OPEX

Streamlined installation and commissioning reduces time onsite

and saves upfront cost

The lowest scheduled and unscheduled O&M achieves the highest savings

7% Lower LCOE

Based on 3rd party data from TÜV

300 ×Less Likely to Experience Catastrophic Failureunder rated conditions.

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