SkyStream Skystream 3.7 User manual

Southwest Windpower, Inc.
1801 West Route 66
Flagstaff, Arizona 86001
Phone: [phone]
Fax: [phone]
Web: www.skystreamenergy.com
Skystream 3.7
Owner’sManual
INSTALLATION
OPERATION
MAINTENANCE
TM
August 2006 Southwest Windpower, Inc. All Rights Reserved

SOUTHWEST WINDPOWER SKYSTREAM 3.7 OWNER’S MANUAL
1
Southwest Windpower
Congratulations on your purchase and welcome to our family!
Dear Skystream 3.7™ Owner,
Thank you for your purchase of Skystream.You have just selected the most technologically advanced, cost-effective renewable energy
appliance available for a home or small business. We congratulate you on your choice and are confident you will experience years of
dependable service.
Before going any further, please complete and return the enclosed Warranty Registration Card. The conditions of your warranty
are dependent upon the proper installation of Skystream. Furthermore, this will assure you of being kept up-to-date with the latest
developments from Southwest Windpower.These include new options, performance tips, updated software to maximize output and
user notices. It is important to know that we do not sell or distribute your information to any third party. We understand your privacy
is important.
If you have any questions or comments, we would like to hear from you. Please call during working hours (Monday-Friday – 8:00am to
5:00pm Mountain Standard Time). Our number is 928-779-9463, toll-free 866-807-9463.
Again, welcome to our family and thank you for investing in the future of wind energy with Skystream.
Best Regards,
Southwest Windpower
Enter the serial and model number below
Serial Number __________________________________
Model Number __________________________________
Skystream Installation Manual
Document No. 0313

SOUTHWEST WINDPOWER SKYSTREAM 3.7 OWNER’S MANUAL
2
IMPORTANT SAFETY INSTRUCTIONS
READ THESE INSTRUCTIONS IN THEIR ENTIRETY BEFORE INSTALLING OR OPERATING.
1) SAVE THESE INSTRUCTIONS. This manual contains important instructions for
Skystream that must be followed during installation and maintenance.
2) Read, understand and respect all warnings.
3) Do not install Skystream around standing water.
4) Do not install Skystream on a windy day.
5) Install Skystream in accordance with National Electric Code (NEC) and local
building codes.
6) Always obtain a building permit before construction.
7) When moving Skystream or any heavy objects to the site, use a cart to prevent
back injury.
8) If unusual noise or abnormal operation is observed from Skystream, turn off the
machine and contact authorized service personnel.
9) This wind generator complies with international safety standards and therefore the
design or its installation must never be compromised.
a. Do not open the inverter cover, doing so without factory authorization
will void the warranty.
b. Apply the proper torque to all fasteners.
c. Torque field wire connections to Skystream to 20-25 inch-lbs. (2.3-2.5 N-m).
Refer to Electrical Connections section of this manual (Section 2-1-2).
d. Install only on a Professional Engineer (PE) certified tower.
e. Do not paint the blades.
10) Use only proper grounding techniques as established by the NEC.
11) Properly complete the warranty registration card; failure to complete and return
the card mayaffect your warranty.
12) Skystream must be installed in accordance with this manual and local and national
building codes. Failure to comply with the manual and local codes will affect and
possibly void your warranty.
13) Skystream uses high voltage and is potentiallydangerous. Be sure to use all safety
precautions at all times.
Professional installation
highly recommended
TIP: Helpful information
to ease the installation
Warning: Risk of injury or
death - proceed with extreme
caution
Professional installation
highly recommended
In this manual

SOUTHWEST WINDPOWER SKYSTREAM 3.7 OWNER’S MANUAL
3
Table of Contents
Important Safety Instructions _______________________________ 2
Skystream 3.7 Specifications ________________________________ 4
1) BEFORE INSTALLATION __________________________ 5
1-1 Package Contents______________________________ 5-6
1-2 Recommended Tools __________________________ 6
1-3 Skystream Options ____________________________ 7
1-4 Skystream Project Preparation ____________________ 8
1-4-1 Finding the Best Location for Your Skystream ____ 8
1-4-2 Tower Types ____________________________ 9
1-4-3 Working With Your Utility __________________ 9
1-4-4 Working With Your Local Zoning Authority ______ 9
2) INSTALLATION____________________________________ 10
2-1 Electrical ____________________________________ 10
2-1-1 Wiring ________________________________ 10
2-1-2 Electrical Connections ______________________ 12
2-1-3 Wire Sizing ____________________________ 12
2-1-4 Grounding ____________________________ 13
2-1-5 Fusing/Circuit Breaker ______________________ 13
2-1-6 Checking Grid Connectivity __________________ 13
2-2 Installing Skystream on a Tower ____________________ 14-15
2-2-1 Mounting Skystream to the Tower ____________ 15
2-3 Testing on the Ground ________________________ 15
2-3-1 Electrical Test ____________________________ 15
2-4 Blade, Nosecone and Antenna Assembly ____________ 16-17
3) OPERATION AND MAINTENANCE________________ 18
3-1 Key Operating Characteristics ____________________ 18
3-2 FrequentlyAsked Questions ______________________ 19
4) APPENDICES
Appendix A E
El le ec ct tr ri ic ca al lC Co on nn ne ec ct ti io on nD Di ia ag gr ra am mO Op pt ti io on ns s
1Junction Box at Tower Base______________________ 1
2Direct Run to Home __________________________ 2
Appendix B F
Fo ou un nd da at ti io on nI In ns st ta al ll la at ti io on nM Ma an nu ua al l
1Introduction ________________________________ 2
2Pier Foundation______________________________ 2
2Mat Foundation______________________________ 7
2Electrical Conduit ____________________________ 9
Appendix C T
To ow we er rI In ns st ta al ll la at ti io on nM Ma an nu ua al l
1Introduction ________________________________ 2
2Set Up & Preparation ________________________ 3
3Raising the
T
ower ____________________________ 6
4Lowering the Tower __________________________ 7
5Leveling the Tower____________________________ 8
6Gin Pole Instruction Sheet ______________________ 9

SOUTHWEST WINDPOWER SKYSTREAM 3.7 OWNER’S MANUAL
4
SOUTHWEST WINDPOWER SKYSTREAM 3.7 OWNER’S MANUAL
Skystream 3.7TM Technical Specifications
90
80
70
60
50
40
30
mph 0 4.5 9 13.4 17.9 22.3 27 31.3 36 40.25 44.75
m/s 0 2 4 6 8 10 12 14 16 18 20
Background Sound
Generator Operating
2400
2100
1800
1500
1200
900
600
300
0
mph 0 11 22.3 33.5 44.75 60
m/s 0 5 10 15 20 25
Southwest binned
20-sec average
NWTC
1-min averages
SOUND REPORT
PERFORMANCE GRAPH
Sound Pressure Level dB (A)
Standardized Wind Speed
Watts
Standardized Wind Speed
Model Skystream 3.7
Rated Capacity 1.8 kW rated 2.4 kW peak
Weight 170 lbs. / 77 kg
Rotor Diameter 12 feet / 3.72 meters
Swept Area 115.7 ft2 / 10.87 m2
Type Downwind rotor with stall regulation control
Direction of Rotation Clockwise looking upwind
Blade Material Fiberglass reinforced composite
Number of Blades 3
Rated Speed 50 - 325 rpm
Tip Speed 66 - 213 f/s / 9.7 - 63 m/s
Alternator Slotless permanent magnet brushless
Yaw Control Passive
Grid Feeding Southwest Windpower inverter 120/240 VAC 50-60/Hz
Braking System Electronic stall regulation w/redundant relay switch control
Cut-in Wind Speed 8 mph / 3.5 m/s
Rated Wind Speed 20 mph / 9 m/s
User Control Wireless 2 way interface remote system
Survival Wind Speed 140 mph / 63 m/s
Total Harmonic Distortion 2.7% at 2400W, meets UL1741 and IEEE1547.1
requirements.
900
800
700
600
500
400
300
200
100
0
mph 5.6 7.9 10 12.3 14.5 16.8 19 21.2 23.5 24.6
m/s 2.5 3.5 4.5 5.5 6.5 7.5 8.5 9.5 10.5 11
ENERGY CHART
kWh per month (est)
Average Annual Wind Speed

SOUTHWEST WINDPOWER SKYSTREAM 3.7 OWNER’S MANUAL
5
One - Before Installation
Instructions in this guide apply to Skystream Land and Skystream Marine U.S. models only. Please specify
“land” or “marine” when ordering parts or requesting service as components differ.
1-1 Package Contents
Before you begin, inspect the contents to make sure there is no damage or missing parts.
lIdentify the parts of your Skystream system using the information on the next two pages.
lInspect for damage and/or missing parts.
Your Skystream wind generator is shipped in two boxes:
Box One: rotor blades (three each)
Box dimensions: 76”L x 15”W x 12”H (102 cm L x 56 cm W x 69 cm H)
Weight: 40 lbs (18 kg)
Upon opening, carefully inspect each of the blades to make sure there are no fractures or cracks in the surfaces. Although the Skystream
rotor blades are comprised of a durable compression molded fiberglass, damage can occur to the blades during shipping. Once inspected,
be sure to set them away from the construction site and protect them from any damage until they are ready for assembly.
Box Two: Skystream 3.7 wind generator assembly
Box dimensions: 40”L x 22”W x 27”H (102 cm L x 56 cm W x 69 cm H)
Weight: 175 lbs (80 kg)
Your Skystream comes in several versions in accordance with local utility requirements. Be sure to inspect the package and confirm you
have the right voltage and Hz. If you have ANY questions, call your dealer or the factory before continuing.
configuration 120/240V 120/208V 240V
output power factor rating 1.0
operating voltage range (ac) 106-132V l-n 212-264V
operating frequency range 59.3-60.5 Hz
nominal output voltage (ac) 240V 208V 240V
normal output frequency 60 Hz
max continuous output current 7.5A 8.7A 7.5A
rated output power 1800W
peak output power 2400W
software revision 1.0.00
max ambient temperature 50C. output power is reduced
above 60 C. nacelle temperature

SOUTHWEST WINDPOWER SKYSTREAM 3.7 OWNER’S MANUAL
6
Your Skystream shipment includes:
Your Skystream shipment includes the following components. A spare of each fastener (bolt, washer or nut) is included.The quantities
indicated below are quantities required to assemble Skystream:
RF Antenna
Loctite®242
Turbine assembly with blade hub, retaining nut, blade plate
and nosecone
Blades and blade mounting hardware
lM10-1.5 x 120 socket head bolts, grade 12.9 (quantity 12)
lM10-1.5 nuts, grade 12.9 (quantity 12)
lM10 flat washers, A2 stainless steel (quantity 12)
lM10 lock washer, A2 stainless steel (quantity 12)
lBlade plate
lBlade hub
lM42, hub nut
Nose cone with mounting hardware
lM6-1.0 x 12 socket head bolts, grade 8.8 (quantity 3)
1-2 Recommended Tools
You will need the following tools to complete assembly of Skystream and install on the tower:
lCrescent wrench up to 40 mm
l17, 24, 33, 36 & 50 mm hex wrenches
l19 mm hex wrench and socket for torque wrench
lWire stripper
lPhillips head screwdriver
lFlat blade screwdriver and socket for torque wrench
lMulti-meter
lTorque wrench, 0-100 lb-ft (135 N-m)
lTorque wrench, 0-50 lb-inch ( 5.6 N-m)
Yaw vibration isolators with mounting hardware
lVibration Isolators (quantity 8)
lM12-1.75 x 90 hex head bolt, grade 10.9 (quantity 8)
lM12-1.75 nuts, grade 10.9 (quantity 8)
lM12 flat washers, A2 stainless steel (quantity 8)
lM12 lock washers, A2 stainless steel (quantity 8)
lM12 snubbing washers (quantity 8)
Yaw shield (two halves) with mounting hardware
lM5-0.8x12 button head screws (quantity 4)
Strain relief cover assembly with mounting hardware
lStrain relief cover with ground wire
lM5-0.8 x 12 socket head bolt (quantity 4)
lM5 lock washer A2 stainless steel (quantity 4)
TIP: See exploded view
on pages 16-17
Note: This list does not include tools you will need for the construction of the tower or wire trench.

SOUTHWEST WINDPOWER SKYSTREAM 3.7 OWNER’S MANUAL
7
1-3 Skystream Options
There are a number of options that can enhance the experience of using a Skystream wind appliance. Although your Skystream will
operate without them, we suggest reviewing this chapter. Contact Southwest Windpower or your dealer if you have questions.
TM
remote interface
escape enter
status
www.skystreamenergy.com
Remote Display
The optional remote display allows you to observe
Skystream’s performance in real time.You can also collect
data such as kWh per day, per month and per year. The
display wirelessly connects via a 900 MHz frequency and
works up to 1000 feet from the tower.
USB Converter ä
The USB converter allows
you to connect the remote display to your computer and monitor Skystream
real time. Specialized software allows you to create your own power curves,
monitor performance remotely and even download and transmit the latest
software directly to your Skystream to maximize performance.To connect
Skystream to your computer, you must also use the wireless remote.
Tower Adaptor
The tower adaptor allows
you to attach your Skystream
to a tower constructed of
5 inch schedule 40 pipe.
Nominal internal diameter
of 5 inch (12.7 cm).
Remote Monitoring
There are a number of benefits to remote monitoring. A
subscription to Fat Spaniel Technology allows a third party
company to monitor the performance of your Skystream
and communicate with a local dealer in the event there is a
problem. Additionally, for states with “green tags” you could
receive added revenue for each kWh your Skystream
produces. Contact your dealer or Southwest Windpower
directly for more information.
ä
ä
SouthwestWindpower
Renewable Energy Made Simple
1801 W. Route 66 • Flagstaff, AZ 86001
ph 928.779.9463 fax [phone]
www.windenergy.com
USB
RS485
SouthwestWindpower
Renewable Energy Made Simple
1801 W. Route 66 • Flagstaff, AZ 86001
ph 928.779.9463 fax [phone]
www.windenergy.com
MODEL 3-CMLB-1037
MODEL 3-CMLB-1036-01

SOUTHWEST WINDPOWER SKYSTREAM 3.7 OWNER’S MANUAL
8
1-4-1 Finding the Best Location for Your Skystream
We have worked at simplifying the installation process of Skystream, but each installation is likely to be different. Skystream
may require a different tower depending on trees, obstructions and soil types.
Very Important: Proper siting is essential to a well performing wind generator.
The taller the tower, the more energy your Skystream will produce but keep in mind, this will also increase the cost of the
installation. It is extremely important to balance performance (tower height) to installed cost in order for you to achieve
the lowest cost of energy and quickest payback. Also, keep in mind zoning regulations that may restrict the height of your
tower. See section 1-4-4 regarding zoning.
Our General Rule: For optimal performance, Skystream should be 20 feet (7 m) above any surrounding object within a
250 foot (76 m) radius.
250 feet
20 feet
wind direction
1-4 Skystream Project Preparation
There are several considerations before you begin the installation process of your Skystream.These considerations
are more important if you intend to connect your machine to the electrical utility. Although Skystream is UL and IEEE
certified, your local utility and zoning authority may require additional information prior to installation.This chapter
will provide an overview of what to expect when working with your zoning authority and utility. Southwest Windpower
has a number of resources that may assist you in the permitting and interconnection processes.
To learn more go to: www.skystreamenergy.com
TIP: Your dealer
can help you
determine the
best location for
Skystream on
your property.
Fig. 1 Optimal Skystream location

SOUTHWEST WINDPOWER SKYSTREAM 3.7 OWNER’S MANUAL
9
guyed tower monopole tower lattice tower
1-4-2 Tower Types
Depending on your site needs, Skystream can
be mounted on several different tower types as
long as they meet the tower load specifications
determined by Southwest Windpower and are
certified by a Professional Engineer (PE). While
a guyless monopole tower is the most desired
tower type, it may be more expensive than
some other options such as a guyed tower
or latticed tower. You can find out more
about available tower options provided
by Southwest Windpower at
www.skystreamenergy.com.
1-4-3 Working With Your Utility
Call your local electric utility, tell them your intentions and ask for their “interconnection
agreement”.They should have one. Depending on your utility, the interconnection agreement
may be one page or many. Keep in mind that small utility-connected solar and wind
systems are relatively new industries and utility connection requests may be unfamiliar to
them. If you are the first, realize the process may take longer. Southwest Windpower has
people and tools that may assist in the process.
Your utility may request documentation demonstrating that Skystream is UL 1741 certified.
You can download these at our website: www.skystreamenergy.com
1-4-4 Working With Your Local Zoning Authority
Like your utility, the local planning and zoning authority may or may not have experience with an individual installing a small wind
generator at their home or small business.The most important issue is the height of the tower. Prior to purchasing your Skystream
tower, check for local zoning limitations. Determine what your community allows for towers and determine if the height is appropriate.
Specific data and statistics that may be required by your zoning authority can be found at www.skystreamenergy.com.
TIP: See our website:
www.skystreamenergy.com
for a sample interconnection
agreement that may be used
by a utility that has yet to
establish a program.
Fig. 2 Tower types

SOUTHWEST WINDPOWER SKYSTREAM 3.7 OWNER’S MANUAL
10
Two - Installation
Southwest Windpower designed the installation process of Skystream to be as easy as possible by minimizing the number of connections
between the machine and circuit breaker. Depending on your local utility requirement, you may or may not need to install a separate
disconnect and/or second meter.
You will notice the rotor shaft on Skystream is extremely difficult to turn.This is normal. As a safety precaution, the default position of
Skystream is in brake mode when the inverter is disconnected from the utility-supplied power.The reason is if there is a fault in the utility
line, Skystream must shut down to prevent back feeding of electricity into the line while it is being repaired.
2-1 Electrical
One of the most common causes of wind generator failures is a poor electrical connection. Be sure to follow the instructions and tighten
all fasteners appropriately.
IMPORTANT: It is extremely important that the installation of your Skystream is done in accordance with local and national building
codes as specified by the NEC, UBC (Uniform Building Code) or IBC (International Building Code).These codes will vary from city to
city and even country to country.
2-1-1 Wiring
Skystream has a built-in utility-connected inverter compliant with UL 1741.This means Skystream connects directly to your existing
electrical system. Appendix A includes two reference drawings for utility-supplied power interconnection of your Skystream generator.
These drawings are for reference and may be modified for submittal and approval by your local authorities.
Refer to Fig. 3 on the opposite page for a complete overview of Skystream wiring.
Warning: For your safety,
make sure power is turned off
before working on any and all
electrical connections.

SOUTHWEST WINDPOWER SKYSTREAM 3.7 OWNER’S MANUAL
11
LL1
1
GGNNLL22
Fig. 3 Wiring diagram
Yaw ground wire
Yaw connectors. See Fig. 4 (page 12)
AC Service Panel
Disconnect
switch 2-pole
30A, 250VAC
Optional
kilowat-hour
meter
Main disconnect
N
No ot te e: :Refer to appendix for detailed wiring drawings
White
Black
Red
Bare or green
Tower ground
system (optional)
N
L1
L2
GNL2L1 N/G
G
2
20 0A A
Use only copper wire at the generator terminals
Aluminum wires may be used for home/utility
connection if transition is made in junction box.
14 AWG wire must be copper only.
N
L1
L2
Gnd
2
20 0A A

SOUTHWEST WINDPOWER SKYSTREAM 3.7 OWNER’S MANUAL
12
Fig. 4 Wire run to the yaw connection
Distance AC Service Panel
to Tower Top
AWG
American Wire Gauge
Metric Wire Size
(mm2)
8 AWG
10 AWG
12 AWG
14 AWG
315 feet (92 m)
198 feet (56 m)
125 feet (37 m)
79 feet (23 m)
10 mm2
6 mm2
4 mm2
2.5 mm2
Ground: green
or bare copper
Line 2: red
Neutral: white
Line 1: black
U
Us se ec co op pp pe er rc co on nd du uc ct to or rs so on nl ly y- -M Mi in ni im mu um mw wi ir re et te em mp pe er ra at tu ur re er ra at ti in ng gi is s7 75 5° °C C( (1 16 67 7° °F F) )
Wiring Symbol Definitions
LL11= Line 1, AC Line Voltage, Black Wire
LL22= Line 2, AC Line Voltage, Red Wire
NN= AC Neutral, White Wire
GG= Gnd. = AC Ground, Green or Bare Wire
Indicates AC Ground
2-1-3 Wire Sizing
Measure distance from AC Service panel to Skystream (be sure to
include tower height). Refer to the accompanying wire chart and
select the appropriate gauge wire. Indicated wire sizes will include
length from top of tower to connection at main utility panel.
CAUTION – Be sure power is turned off when
making electrical connections.
lPosition Skystream on its side to access the wire terminals.
lRemove approximately 2 inches (5 cm) of protective
sheathing from cable and strip approximately 0.375 inches
(1 cm) of insulation off wire leads.
lPass cable through strain relief cover so approximately
1 inch (2.5 cm) of cable sheath protrudes through as
shown in Fig. 4 at right.Tighten strain relief clamp to
secure cable.
lConnect the red, black, and white wires to the matching
color coded terminals on Skystream yaw assembly.
Connect the green or bare copper wire to the green ter-
minal.Tighten each screw to 20-25 inch-lbs (2.3-2.5 N-m).
Before attaching the strain relief cover, test the electrical con-
nections by turning on power and measuring voltage at the
yaw terminals. Additionally, with AC power switched on, wait 5-
7 minutes and attempt to rotate the blade shaft.The shaft
should be noticeably easier to rotate.Turn off power and
Skystream should revert to “brake” mode. If Skystream fails this
test, check all connections and repeat test.Test must be passed
before proceeding.
lTurn power off and secure
strain relief cover using
four M5-0.8 x 12 socket
head screws and split
lockwashers. Use Loctite®
242 and torque screws to 20-25 inch-lbs (2.5 N-m).
2-1-2 Electrical Connections
Caution: Make sure AC
power is switched  O FF
before proceeding with
installation

SOUTHWEST WINDPOWER SKYSTREAM 3.7 OWNER’S MANUAL
13
2-1-4 Grounding
Every electrical system must be grounded in accordance with local and national
standards.This will provide some protection against voltage surges and built-up
static charges (see reference drawings in Appendix A).
Section 810 of the National Electrical Code ANSI/NFPA No. 70 (USA only)
provides information with respect to proper grounding of the tower, size of the
ground wire, type of discharge unit, size of grounding conductors, location of
discharge unit, connection to grounding electrodes and requirements for the
ground electrode.
Note: The AC output neutral is NOT bonded to ground within Skystream.
AC neutral is bonded to ground at AC distribution panel.
The instructions in this section are for reference only as the
requirements in your area may be different.
2-1-5 Fusing/Circuit Breaker
Skystream connects directly into your electrical panel. Wiring will vary with local
zoning authority and utility (see reference drawings in Appendix A). Some
installations will require a visible lockable disconnect switch located next to
the electrical meter and/or at the base of the tower.The disconnect switch
is utilized by your local utility in the event of a power outage to ensure no
voltage is placed on the utility line during repair. Again, it is extremely important
to install in accordance with local and national zoning regulations.
Note: Only 20 Amp circuit breakers may be used to connect Skystream to AC
service panel. Refer to Fig. 3, wiring diagram.
2-1-6 Checking correct grid connectivity
IMPORTANT: All electrical connections should be completed
before testing.
To check for correct connections:
lCheck that all connections are complete.
lSwitch on all of the disconnects between the turbine and the utility power.
lWait for 5-7 minutes.
lCheck that the rotor spins free.
lImportant: Disconnect the turbine from utility power.
lCheck that the rotor no longer spins free.
Fig. 5 Proper grounding of the yaw connection

SOUTHWEST WINDPOWER SKYSTREAM 3.7 OWNER’S MANUAL
14
1 ½ feet
(46 cm)
1 foot
(30 cm)
Stub tower
Not to exceed
7 feet (213 cm)
2-2 Installing Skystream on a Tower
There are several types of towers that can be used with Skystream. It is essential that
Skystream is installed on a properly engineered tower. One of the leading causes of
wind generator failure is use on a poorly designed tower.
Southwest Windpower has made available various tower designs that meet our
criteria. We have established a program allowing tower manufacturers to include their
designs on Southwest Windpower’s website list of recommended towers.
Regardless of the tower design and height you select, there are two critical areas that
must be considered when selecting the tower.These are the stub tower height and
blade clearance (see Fig. 6).
Fig. 6 Blade tip clearances
IMPORTANT: Southwest
Windpower’s Warranty is
only extended to installations
that are made on a properly
engineered tower. Southwest
Windpower reserves the right
to deny any warranty claim in
which an improperly designed
tower is used.

SOUTHWEST WINDPOWER SKYSTREAM 3.7 OWNER’S MANUAL
15
2-2-1 Mounting Skystream to the Tower
Refer to Fig. 7 (page 16) for visual aid.
Note: The following directions assume Skystream will be bolted to tower on ground and tower will be tilted into position. Alternately
Skystream may be completely assembled on the ground and “hoisted” into position.
To ease mounting Skystream, support the upper end of the tower approximately 2-3 feet (0.6-1.0 m) above the ground.
lInstall the vibration isolators on yaw flange as shown in Fig. 7 (page 16). Install snubbing washers and bolts in vibration isolators.
Note: The orientation of the vibration isolators is very important. Refer to Fig. 7.
lUsing an appropriate lifting device and sling, lift Skystream and align vibration isolator bolts with holes in tower flange.
lInstall nuts, flat washers and lock washer on bolts to secure Skystream to tower.
lTorque vibration isolator bolts to 80 lb-ft (108 N-m) in two steps. First torque all bolts to 40 lb-ft (54 N-m) then to 80 lb-ft (108 N-m).
lMount yaw shield halves using four M5 button head screws. See Fig. 7 (page 16). Use Loctite®242 supplied with Skystream.
2-3 Testing on the Ground
Though Skystream is thoroughly tested at the factory, it is very important to conduct one more test prior to erecting the tower.
Skystream should be wired and mounted to the top of the tower.The blades should not be attached.To do this test, you must have all
wires and breakers installed with at least one disconnect switch open (off).
2-3-1 Electrical Test
lAttempt to rotate the rotor shaft. It should be difficult to turn.
lNow turn on all power going to Skystream.Turn on all breakers, connect all switches and wait 5-7 minutes.
lGrab the rotor shaft again and try to spin it. If assembled correctly, it should spin easily.
lBefore you go any further, turn the power off and disconnect any switches. Again, try spinning the shaft. It should be difficult to turn.
If Skystream does not spin freely after electrtical test, then check for loose or disconnected wires. Repeat the test until you are successful.
Warning: Working on towers is dangerous
and should be left to professionals with proper
safety equipment and training.

SOUTHWEST WINDPOWER SKYSTREAM 3.7 OWNER’S MANUAL
16
2
3
4
7
5
6
8
10
11
12
13
15 16 17
18
19 20 21
23
22
24
14
1
9
Refer to Fig. 8 (page 17) for visual aid.
The Skystream blades may be bolted to the blade hub
and mounted on Skystream as a complete assembly by
performing the following steps.
lRemove the blade mounting hub and plate from
Skystream by “unscrewing” the hub while holding the
rotor shaft stationary.
lPlace a blade between the blade hub and blade
mounting plate. Refer to Fig. 8 (page 17) for proper
orientation. N
No ot te e: :the blades may only be installed in
one position due to the “triangular” boss cast into one
side of the blade root (base).
lLoosely install the bolts, flat and lock washers for one
blade leaving enough play so remaining blades can be
installed.
lAfter all blades and bolts are loosely installed between
blade hub and mounting plate, tighten bolts enough to
clamp blades between hub and blade plate.
lTorque blade bolts to 50 lb-ft (68 N-m) in two steps.
First torque all bolts to 25 lb-ft (34 N-m) then to 50
lb-ft (68 N-m).
lBlade assembly may now be mounted on Skystream.
Slide blade assembly completely onto shaft. With
assembly completely on shaft, large mounting nut can
be started on shaft threads.
lCompletely “spin” on blade assembly. Securely tighten
blade assembly by holding blades and tightening “flat”
on rotor shaft. N
No ot te e: :the blade assembly is self-tightening
in operation; however it should be securely tightened
during assembly (200lb-ft).
lInstall nosecone with three M6-1.0x12 socket head
bolts. Use Loctite®242 supplied with Skystream.
lInstall RF Antenna on matching fitting on top of
Skystream. Finger-tight is sufficient.
Important: Do Not Forget to install RF Antenna
Even if you have not purchased the optional remote display,
the RF antenna may be used by service personnel to
diagnose,troubleshoot or upgrade your Skystream
without removing it from the tower.
2-4 Blades, Nosecone and Antenna Assembly
Fig. 7
Y
aw and antenna assembly

SOUTHWEST WINDPOWER SKYSTREAM 3.7 OWNER’S MANUAL
17
2
3
4
7
5
6
8
10
11
12
13
15 16 17
18
19 20 21
23
22
24
14
1
9
Fig. 9 Completed assembly
# Description Qty.
1 RF Antenna 1
2 M12x1.75x90mm Hex Bolt grade 10.9 8
3 Snubbing Washer 8
4, 5 Vibration Isolation Ring (4) and Bushing (5) 8
6 Strain Relief Cover Assembly 1
7 Shield 2
8 M5x.8x12mm Button Head grade 8.8 4
9 M5 Lock Washer A2 stainless steel 4
10 M5x.8x12mm Bolt SHCS grade 8.8 4
11 Flat Washer (M12) A2 stainless steel 8
12 Lock Washer (M12) A2 stainless steel 8
13 M12x1.75 Nut grade 10.9 8
14 5" Tower Insert 1
# Description Qty.
15 M10x1.5 Nut grade 12.9 12
16 Lock Washer (M10) A2 stainless steel 12
17 Blade Plate 1
18 Blade 3
19 Blade Hub 1
20 Flat Washer (M10) A2 stainless steel 12
21 M10x1.3x120mm Bolt SHCS grade 12.9 12
22 Nose Cone 1
23 Hub Retaining Nut grade 10.9 1
24 M6x1x12mm Bolt SHCS grade 8.8 3
Yaw Components
Blade Components
Fig. 8 Blade and nosecone assembly
(optional)

SOUTHWEST WINDPOWER SKYSTREAM 3.7 OWNER’S MANUAL
18
Three - Operation & Maintenance
3-1 Skystream 3.7™ Key Operating Characteristics
The Skystream 3.7 operates by converting the kinetic energy of the wind into rotational motion that turns an alternator and ultimately
produces usable electric power. In actuality this is a great over simplification of Skystreams operation since it must very precisely match
the frequency and voltage of the electricity supplied by the local utility company in order to power your home and its appliances.
Additionally Skystream monitors and adjust its performance to provide safe operation and extract the maximum energy from even low
speed winds.
Skystream will begin producing power in a wind of approximately 8 mph (3.5 m/sec). At that speed the blades will rotate at approxi-
mately 120 rpm. As the wind speed increases the blade speed will also increase until at about 20 mph (9 m/sec) wind speed the blade
speed achieves a rotational speed of 325 rpm.This is Skystreams rated speed. Should the wind speed increases above 20 mph the blade
speed will remain fixed at 325 rpm.
If a condition occurs that causes the rotational speed to exceed 360 rpm, Skystream will shut down for approximately 10 minutes after
which it will resume normal operation unless a fault is detected causing it to remain shut down.This is an unlikely scenario that should
never occur in normal operation.
As the wind speed exceeds 25 mph Skystream enters a reduced power mode marked by lower power production and reduced blade
speed. Should the wind speed continue to increase and achieve 65 mph Skystream will assume storm conditions exist and shut down
for one hour. After one hour Skystream will restart operation in the reduced power mode. It will remain in reduced power mode until
it determines that the wind speed has returned pre-storm levels at which time it will resume normal operation.
In addition to adjusting its operation in response to wind conditions Skystream also monitors the electrical utility grid and its own inter-
nal health. Should the electric utility voltage or frequency differ from Skystream’s voltage, for example due to a power failure, Skystream
will disconnect from the grid and enter a “braked mode”. While in this mode the blades are held stationary while the Skystream moni-
tors the utility power. If Skystream determines that the power has returned to within specification, it will re-connect to the grid and
resume normal operation.This is the same cycle that occurs when Skystream is initially powered.
Additionally, should Skystream determine an internal fault exists it will execute an emergency shutdown – an E-stop. An E-stop will only
take place if a severe fault that requires servicing internal components has occurred. For that reason resetting an E-stop requires gaining
access to the interior of Skystream. It cannot be reset from the ground.
As a final note, Skystream is factory configured for operation up to 1000 meters (3,300 feet) above sea
level. If your installation exceeds this elevation please consult Southwest Windpower technical service
for assistance in resetting the configurations for your elevation.

SOUTHWEST WINDPOWER SKYSTREAM 3.7 OWNER’S MANUAL
19
SOUTHWEST WINDPOWER SKYSTREAM 3.7 OWNER’S MANUAL
3-2 Frequently Asked Questions
1) What happens if I lose power from my utility company?
If there is a power outage the Skystream will shut down within one second. It will resume normal operatio when power is restored.
There are many safety requirements of a utility-tied inverter.The Skystream meets all of these requirements per UL 1741.
2) Does the Skystream have lightning protection?
Yes the Skystream has lightning protection.The Skystream can handle 6000 Volts as required by UL 1741. If you live in a lightning prone
area SWWP recommends an additional lightning arrestor at the base of the tower.
3) What should I do if I’m expecting a severe storm?
The Skystream is designed for very high winds, but it is always a good idea to shut Skystream down if there is going to be a severe
storm to protect against any flying debris.
4) How do I shut down Skystream?
To turn off Skystream all you need to do is turn off the breaker Skystream is connected to.This will cause NO damage to the unit.
5) Can I leave Skystream unattended?
Yes, the Skystream is designed to operate without any user input. If there is any fault it will shut down on its own.
6) What do I do if Skystream is facing upwind even though there is a strong wind?
If the Skystream is not tracking correctly, then you should check to see if the tower is level.
7) When should I contact an authorized service technician?
a. If there is any unusual vibration coming from Skystream.
b. If you hear any noise that sounds like mechanical interference.
c. If the Skystream is connected to the utility power (i.e. all breakers and disconnects are turned on), the wind is blowing, but
the Skystream is not turning very fast.
8) Can I mount Skystream to my roof?
Roof and building mount is not recommended. Because of the size and weight of the wind generator, Skystream needs to be mounted
on a PE certified tower to ensure the quietest and safest system. Roof mounting will invalidate the warranty.