The world’s most proven 50 kW wind turbine

Manufactured by Seaforth Energy

The world’s most proven 50 kW wind turbine The AOC 15/50 is the world’s most proven 50 kW wind turbine.

Manufactured by Seaforth Energy, the AOC 15/50 is a 50 kW wind turbine that provides emission-free electrical energy for local electrical grid consumption, electrical generation direct to panel, remote community wind-diesel integration, and off-grid village electrification.

The AOC 15/50 has been installed around the world, including in Canada, the United States, the Caribbean, United Kingdom, Ireland, Italy, Spain, Morocco, and India.

The AOC 15/50 wind turbine is the evolution of the rugged and reliable Enertech E 44, originally designed by the National Renewable Energy Laboratory (NREL) in the United States. Hundreds of E 44s were installed in the 1980s, many of which are still running today.

In the 1990s, the Enertech E 44 was evolved into a 50 kW version called the AOC 15/50. Seaforth Energy began manufacturing the AOC 15/50 in 1995.

Since that time, Seaforth Energy has assembled a team of engineers, installation and maintenance technicians who are unparalleled worldwide for their proven knowledge and experience in the responsible installation of 50 kW wind turbines.

Seaforth Energy’s customers range from governments through large commercial enterprises, to small businesses and farmers. All of these customers share the same goals: to reduce their energy costs and create a sustainable source of revenue, while helping to reduce atmospheric pollution.

On a site with an average annual wind speed of 6.7 m/s (15 mph) the AOC 15/50 will displace approximately 156 tonnes of greenhouse gasses annually.

Dominican Republic, Las Galeras, 2008

Goldboro, Guysborough County, Nova Scotia, 2013

Proven performanceThe AOC 15/50 has a verifiable track record of proven performance.

First deployed in the 1990s, the AOC 15/50 is the longest serving wind turbine in its class. There are AOC 15/50s all over the world that have been in service since the 1990s and continue to make power today. We have sold AOC 15/50 wind turbines to customers in Asia, Europe, Africa, North America and South America.

Seaforth Energy provides an internet based remote monitoring system for the AOC 15/50 that can be accessed through wireless or hard-wired connections. The monitoring system allows owners and other stakeholders to see real-time production data from their turbine. At the same time, support teams are able to monitor a variety of operational data points to ensure the efficient operation of the AOC 15/50.

This combination of experience and technological expertise delivers proven performance.

Proven durability The AOC 15/50 is designed to be durable in extreme weather conditions.

The AOC 15/50 features a sealed ductile iron drive train, which keeps the turbine protected in harsh climates.

The AOC 15/50’s passive yaw, multiple braking systems, and off-the-shelf components all contribute to its durability, reliability, safety, and ease of service.

A complete maintenance methodology is included in the AOC 15/50’s User Manual that has been developed through years of testing and operation.

The AOC 15/50 has the longest length of service and largest breadth of deployment in the 50 kW class.

Design facts The wind turbine consists of a 15 m rotor that produces 50 kW.

The towers are typically 18, 24, 30, 36 and 42 m in height. There are both monopole and lattice versions, with tilting versions of each to allow for lowering the turbine due to adverse weather conditions.

The blades are epoxy-fibreglass composite and measure 7.2 m.

The turbine has a constant, low speed blade rotation (64 rpm).

The turbine freely rotates to align with the wind’s direction eliminating the need for an active yaw motor.

Forbes Lake, New Glasgow, Nova Scotia, 2013

The National Renewable Energy Laboratory (NREL), located in Golden, Colorado, is the United States’ primary laboratory for renewable energy and energy efficiency research and development. The National Renewable Energy Laboratory (NREL) is a government- owned, contractor-operated facility; it is funded through the U.S. Department of Energy (DOE).

Power Performance Test Report for the AOC 15/50 Wind Turbine - NREL 34305, Power Performance Test Report R3

Wind Turbine Generator System Acoustic Noise Test Report for the AOC 15/50 Wind Turbine - NREL 34021, Acoustic Noise Test Report

Wind Turbine Generator System Safety and Functional Test Report for the Atlantic Orient 15/50 Wind Turbine - NREL 34382, Safety and Function Test Report

Wind Turbine Generator System Duration Test Report for the Atlantic Orient 15/50 Wind Turbine - NREL 34017, Duration Test Report

Sandia National Laboratories, managed and operated by the Sandia Corporation (a wholly owned subsidiary of Lockheed Martin Corporation), are two major United States Department of Energy research and development national laboratories. They test alternative energy devices amongst a wide array of energy product testing.

Analysis of a Composite Blade Design for the AOC 15/50 Wind Turbine Using a Finite Element Model

Underwriters Laboratories (UL) is a safety consulting and certification company headquartered in Northbrook, Illinois. It maintains offices in 46 countries. UL was established in 1894 and has participated in the safety analysis of many of the last century’s new technologies, most notably the public adoption of electricity and the drafting of safety standards for electrical devices & components.

Acoustic Noise Test Report Power Performance Measures Control Panels

Independently provenThe growth of renewable energy, while good for the industry and the environment, has also resulted in a large number of untested wind energy solutions on the market. Seaforth Energy supports the requirement that all wind turbines be tested and certified as being fit for its purpose by independent third parties.

The AOC 15/50 has been subjected to rigorous 3rd party testing. Much of this testing was carried out at the U.S. National Renewable Energy Laboratory (NREL) in Colorado. The blade design has been independently tested at Sandia National Laboratories. Further, the AOC 15/50 has been issued 3 UL Certificates.

Seaforth Energy continues to pursue the latest certification standards for the AOC 15/50. The turbine is currently on the Interstate Turbine Advisory Council list of approved small wind turbines in the US. It is approved for use by the New York State Energy Research and Development Authority (NYSERDA), and is the only 50 kW wind turbine currently undergoing testing for the Small Wind Certification Council (SWCC) to be certified to AWEA 9.1. The AOC 15/50 also has its Declaration of Conformity for CE marking in Europe.

No other turbine in the 50 kW class has completed this level of testing and certification.

AOC 15/50 third party tests and certifications

All our tests, reports and certifications are available by request or online at www.seaforthenergy.com/aoc-1550/certifications

Kotzebue, Alaska, July 1997

Université Sainte-Anne, Church Point, Nova Scotia, 2010

Wind turbine power curveIndependently produced through testing by NREL & RISO.

Trivigno, Italy, 2012

Annual energy producedIndependently produced through testing by NREL & RISO.

Proven designThe design of the AOC 15/50’s components and operation is the result of years of testing and operational refinement. The AOC 15/50 has been engineered to deliver.

The designation 15/50 refers to the 15 m diameter rotor and the wind turbine is rated output of 50 kW. This rated output is achieved at 12 m/s (26.8 mph) by the 50 Hz version and at 11.3 m/s (25.3 mph) by the 60 Hz version.

The AOC 15/50 includes the following design features:

• Downwind, passive yaw • High efficiency NREL designed airfoils • High strength to weight ratio fibreglass blades • PLC controlled, aerodynamic tip brakes • PLC controlled electro-dynamic brake • PLC controlled multi-disk parking brake • Single piece hub casting • No slip rings • Integrated planetary gearbox • 3-phase induction generator • Single piece cast tower top lattice tower interface • Custom height lattice tower or tubular tower • PLC based controller with adaptive features • Optional tilt-up tower for remote locations

The AOC 15/50 is a downwind turbine. The two stage planetary gearbox is integrated in the single piece cast housing. See Figure 1 for a more detailed view of the drive train assembly. Note that the generator/parking brake assembly is flange mounted to the planetary gearbox.

Both turbine versions are designed to cut in at 4.9 m/s (10.2 mph). The 50 Hz reaches its peak continuous output of 55 kW at 15 m/s (34 mph); the 60 Hz achieves its peak of 65 kW (60 Hz) at 16 m/s (36 mph).

1 - Gearbox Assembly & Location of Oil Fill Plug 2 - Generator / Parking Brake Assembly 3 - Rotary Transformer 4 - Lattice Tower Top

5 - Yaw Bearing Assembly 6 - Rotor Hub Assembly 7 - Twist Cable Suspension Bracket 8 - Yaw Lock Assembly

Figure 1: AOC 15/50 Wind Turbine Generator Drivetrain Assembly

Overall Dimensions: Length: 2.7 m (105 in) Height: 0.8 m (30 in) Width: 1.0 m (40 in)

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Proven team Established in Nova Scotia, Canada in 1995, Seaforth Energy is a world leading wind turbine manufacturer and installer.

A commitment to maintaining the AOC 15/50’s design simplicity, rugged materials, and safety features ensures that Seaforth Energy’s AOC 15/50 continues to produce clean electricity in a variety of wind regimes, locations and markets.

Seaforth Energy and its distributors provide a team of proven wind energy professionals with years of experience. These years are comprised of thousands of hours of time engineering and implementing a proven manufacturing process, and installing AOC 15/50 wind turbines all over the world.

Seaforth Energy’s multi-disciplinary team of engineers have spent years undertaking detailed analysis, and implementing tested design standards, in order to support the successful operation of the AOC 15/50.

Seaforth Energy’s manufacturing team is comprised of proven technicians who are extensively trained. This training ensures that the highest quality product is delivered at each of our AOC 15/50 installations.

Seaforth Energy’s team of sales professionals are amongst the most experienced in the world. They have created a proven process to educate distributors and customers on how to best identify, install, and maintain AOC 15/50 wind turbine sites around the world.

Proven processWind turbine projects are all unique due to the regulatory and geographic conditions present at each site.

Seaforth Energy and its distributors have the expertise and experience to identify well performing sites for the location of an AOC 15/50.

We have the necessary skills to navigate the regulatory compliance and interconnectivity processes specific to your location.

The process of creating a successful wind energy project typically include the following steps:

• Site Assessment • Building, electrical, and other relevant permits • Net-metering or Feed-in-Tariff agreement with local power company • Geotechnical survey of turbine site • Foundation design based on geotechnical results • Tower design • Manufacture of turbine, blades, control panel, and tower • Foundation installation • Electrical installation • Tower assembly and erection • Commissioning

Seaforth Energy’s experience installing turbines in many countries and geographic locations allows us to actively assist our distributors and customers complete their installations successfully.

Cassop Elementary School, Durham, England, 1998

+1 (888) 801-9321 sales@seaforthenergy.com www.seaforthenergy.com