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Improving solar trackingperformance and reliability

with the SKF Solar Hub

SOLAR POWER

Benets

Designed for 20-year life Virtually maintenance-free Minimal backlash for accurate

tracking Higher stiffness increases

power generation

Built for severe environments Higher load and torque carryingcapabilities

Optimal grease for longerservice life

Lubricated, sealed andassembled for extendedservice life

Minimized footprint to reducesize and overall cost

Typical applications Solar tracking systems for:

Photovoltaics (PV) Concentrating photovoltaics(CPV)

Concentrating solar power(CSP)

Precision tracking to generate morepower and more pro tabilitySKF Solar Hub will allow for increasedpower generation and improved systemefciency. Designed to custom solarrequirements, it provides the necessarymechanical movement and torque toallow the solar panels to accurately trackthe sun as it moves across the sky.

Using the SKF Solar Hub for the azimuthfunction can typically provide an increasein efciency of 1520% relative to a xedinstallation.

Advanced technology bene tsmanufacturers as well as end usersSKF Solar Hub integrates a self-lockinggearbox, bearings, lubricant, and robustsealing solution in a housing for optimalperformance in severe outdoorconditions. In contrast to the traditionaldrive, the SKF Solar Hub provides avirtually maintenance-free, reliable,and cost-effective way to track the sun.On site, the SKF Solar Hub is designed tobe a bolt-in solution requiring minimaltime to install in the eld, saving timeand expenses. And because the SKFSolar Hub is virtually maintenance-free,downtime is minimized and costs arereduced over todays maintenance-intensive solutions. By minimizingmaintenance and maximizing power

generation, SKF Solar Hub userscan achieve lower levelized cost of

energy (LCOE).

SKF offers a complete approachAs the world leader and innovator inrotating equipment technology for morethan 100 years, SKF has a uniqueunderstanding of how machine compo-nents and industrial processes areinterrelated, in every major industryworldwide. This knowledge coupledwith our expertise in sealing solutions,lubrication systems, linear motion,machinery maintenance, mechatronics,and services enables us to deliverreal-world solutions that help maximizemechanical performance over the entirelifecycle of an asset.As a result, SKF can be your singlesource for solar tracking componentsincluding linear actuators, rotary drivesand related technologies and services.

For more information about SKF products and solutionsfor the solar industry, visit www.SKF.com/Solar

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Lower lifetime system costs with SKF Solar HubCombining robust design, easy installation, virtually maintenance-free operation and reduceddowntime, SKF Solar Hub can help to reduce solar power generation costs while increasingproductivity and protability.

SKF is a registered trademark of the SKF Group.

SKF Group 2013The contents of this publication are the copyright of the publisher and may not be reproduced (evenextracts) unless prior written per mission is granted. Every care has been taken to ensure the accuracy ofthe information contained in this publication but no liability can be accepted for any loss or damagewhether direct, indirect or consequential arising out of the use of the information contained herein. Anycost savings and revenue increases in this publication are based on results experienced by SKF customersand do not constitute a guarantee that any future results will be the same.

PUB 74/P8 12752/1 EN May 2013

Certain image(s) used under license from Shutterstock.com.

Technical data SKF Solar Hub CRSD 290Dynamic torque 10,5 kNmStatic torque 21 kNm

Axial load rating 65,5 kNRadial load rating 39,7 kNOverturning moment 45,7 kNmSelf-locking gears YesGear ratio 1:90Voltage DC / AC motor optionalFeedback positioning Encoder optional with motorOperating temperature 20 to +60 CType of protection IP 65Weight 102 kgInner bolt pattern 230 mm, 20 x M16 12.9Outer bolt pattern 340 mm, 20 x M16 12.9

3

2

1

0

Wear (20-year life, accelerated testing)

SKF Solar Hub Standard drive

>300% improvement

300

250

200

150

100

50

0

Grease loss (20-year life - accelerated testing)

SKF Solar Hub

Grease loss [g]

Standard drive

No furtherlubrication required

5 000

4 000

3 000

2 000

1 000

0

Cost of ownership (20-year life cost/tracker)

SKF Solar Hub Standard drive

Initial costMaintenance

Virtuallymaintenance-free

Cost [$]