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Title Type Language Date Version Rating
SunKeeper-Datasheet application/pdf English 01.02.1970
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Marketing 3.17 Mb pdf

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SunKeeper Operator’s Manual application/pdf English 11.13.2009 01
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Marketing 636.19 Kb pdf

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Comprehensive manual covering installation, operation, and maintenance of the SunKeeper controller.

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Remote Temperature Sensor Installation Instructions application/pdf English 09.28.2019 08
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Marketing 5.36 Mb pdf

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Installation instructions for the Remote Temperature Sensor.

Applicable Products:

  • ProStar (Gen 2)
  • ProStar Gen 3
  • ProStar MPPT
  • TriStar
  • SunKeeper
  • SunSaver Duo
  • SunSaver MPPT

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Charging Isolated Battery Banks – 1 controller application/pdf English 09.29.2011 01
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Marketing 172.98 Kb pdf

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There is often a need to charge two or more isolated batteries with the same off-grid solar system. Morningstars SunSaver-Duo charge controller is designed to charge 2 isolated battery banks with an adjustable charging priority. We recommend the use of this controller for isolated battery bank applications.

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Charging with Parallel Controllers application/pdf English 05.13.2013 01
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Marketing 529.56 Kb pdf

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A diagram showing two SunSaver controllers shows how to properly parallel multiple Morningstar controllers into the same battery system. The concepts shown are applicable to all Morningstar controller models.

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Correct Inverter Wiring application/pdf English 05.13.2013 01
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Marketing 553.82 Kb pdf

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A diagram shows how to properly wire a charge controller and an inverter into the same battery-based PV system.

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Declaration of Conformity for Products Under 48V application/pdf English 10.20.2011 01
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Marketing 256.14 Kb pdf

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The EMC Directive 2004/108/EC

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Morningstar-Corporation-Traditional-PWM-vs-TrakStar-MPPT-Whitepaper-March-2015 application/pdf English 02.11.2014 01
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WHITEPAPER 1005.40 Kb pdf

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A white paper discussing the advantages and disadvantages of PWM and MPPT charge controller technologies. Sizing, environmental, and cost factors are discussed.

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Parallel Battery String Wiring application/pdf English 05.28.2013 01
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Marketing 524.89 Kb pdf

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A diagram shows how to correctly wire charge controllers to a battery bank comprised of multiple parallel strings. Correct wiring is important to ensure even and distributed charging of the entire bank.

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Relay Driver Load Control application/pdf English 05.13.2013 01
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Marketing 534.08 Kb pdf

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A diagram showing an effective way to implement load control using the Morningstar Relay Driver accessory module. Best used in systems that do not utilize controllers with built-in load control circuitry.

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SunKeeper Advantages application/pdf English 05.13.2013 01
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Marketing 12.45 Kb pdf

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SunKeeper Product Advantages

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SunKeeper Field Testing Instructions application/pdf English 10.29.2007
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Marketing 27.75 Kb pdf

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This document specifies basic testing instructions for verifying operation of the SunKeeper controller when on site and no external power sources are available.

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SunKeeper Mechanical Diagram (no mounting feet) application/pdf English 11.26.2007 01
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Marketing 25.16 Kb pdf

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This document displays the physical dimensions of the SunKeeper without the mounting feet.

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SunKeeper Mechanical Diagram (with mounting feet) application/pdf English 11.26.2007 01
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Marketing 26.57 Kb pdf

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This document displays the physical dimensions of the SunKeeper with the mounting feet.

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What is Class 1, Division 2, Classification? application/pdf English 10.16.2013 01
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Marketing 361.62 Kb pdf

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Stand Alone Solar Electrical Installations in Hazardous Locations… What is Class 1, Division 2 Classification?

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Title Type Language Date Version Rating
Audible buzzing noise during charging text/plain English 12.07.2009 01
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Tech Note 1.00 b txt

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I sometimes hear a buzzing noise during charging. Is something wrong?

No. The buzzing sound is mechanical resonance created by the switching of current through the circuit board and solid-state devices. This is normal and not indicative of a problem.

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Calculating temperature compensated charging application/pdf English 05.17.2011 1
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Tech Note 191.23 Kb pdf

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Here’s a brief explanation on how to calculate the temperature compensated adjustments our controllers make to their charging voltages based on the ambient temperature changes.

The charging voltages listed in the controller operator’s manual are specified at a 25C standard test condition ambient temperature with a -.030V (@ 12V battery) adjustment per degree C change in temperature above or below the 25C reference. The (-) in front of the .030V indicates that voltage adjustment is inverse to the change in temperature. In other words, if the temperature increases above 25C, the controller decreases it’s charging voltage by -.030V per degree C rise above 25C and vice versa. An accurate measurement of the ambient temperature is required for calculating the the controller’s temperature compensated adjustment.

Example:

An ambient temperature of 35C = +10C increase above the 25C base temp = 10 x -.030V compensated adjustment = temperature compensated -.300V decrease in charging voltage.
Therefore, a 14.4V charging voltage specified in the manual @ 25C would be reduced to 14.1V @ 35C or increased to 14.7V @ 15C.

The compensation rate is doubled to .060V/C for 24Vnominal battery systems and quadrupled to .120V/C for 48V nominal battery systems.

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Calculating temperature compensation variances application/pdf English 09.28.2011 01
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Tech Note 191.23 Kb pdf

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How do I calculate the effect of temperature compensation on the regulation voltage?

Refer to the accompanying document download, which includes compensation curves for most Morningstar Controllers, or refer to temperature compensation coefficient in the specifications section of the Operator’s Manual.

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Can I mount the controller horizontally? text/plain English 05.12.2013 01
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Tech Note 1.00 b txt

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Morningstar controllers have been designed to mount vertically. This is the orientation in which the heatsinks are most effective. Mounting the controller horizontally will reduce its passive cooling efficiency, but the risk of overheating will be determined by the ambient temperature and the power level at which the controller will be operating.

All efforts should be made to mount the controller vertically.

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Charge isolated battery banks with one controller application/pdf English 09.28.2011 01
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Tech Note 111.30 Kb pdf

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Can I charge separate battery banks with one Morningstar charge controller?

Yes.  Refer to the document, “Charging Isolated Battery Banks – 1 Controller”.

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Charging Isolated Battery Banks – 1 Solar Array application/pdf English 09.29.2011 01
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Tech Note 48.64 Kb pdf

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A wiring diagram for charging multiple isolated battery banks using multiple controllers and only one PV array.

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Charging LED staying lit after solar input removed text/plain English 05.12.2013 01
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Tech Note 1.00 b txt

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Most Morningstar controllers will take up to 5 minutes to realize that the solar input voltage is no longer present before transitioning into the ‘night’ state. The controller performs periodic day/nigh checks (about once every 5 minutes). Depending upon where the controller is in this cycle when the input is removed, it may take anywhere from 0-5min for the controller to turn off its Charging LED and go into the ‘night’ state.

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Charging NiMh Batteries text/plain English 10.16.2007 01
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Tech Note 1.00 b txt

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Our controllers are designed to charge lead-acid batteries which have different charging requirements than NiMh. Please DO NOT use our products with NiMh batteries, it is dangerous to do so.

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Common Reasons Why Power Transistors Fail text/plain English 09.28.2011 01
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Tech Note 1.00 b txt

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The internal switches of a controller, called MOSFETs or power transistors, switch current on and off to control solar current and load current. Because these components are in the power path, the controller will no longer be able to switch current if they fail.

Power transistors can fail for the following reasons:

  • Over-voltage: lightning or other high voltage transients on the PV power cables.
  • Over-current: too much PV for the controller or a short in the PV line pulls too much currentout of the battery through the controller.
  • Extreme temperatures during charging.
  • A premature failure of the component. The transistors are solid state devices that are manufactured in huge volumes with extremely low failure rates. However, no electrical components are 100% defect free and can pass test and then fail after a short period of time.
  • Old age

 

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Controller System Sizing with 60 Cell Modules application/pdf English 10.01.2013 01
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Tech Note 290.20 Kb pdf

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This Tech Tip discusses the use of today’s 60 cell PV modules with Morningstar’s solar controllers. It explains why 60 cell modules are not well adapted for meeting the nominal array voltage requirements of PWM controllers. It also shows how Morningstar’s MPPT controllers can be used with great success at higher input voltages.

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Do Morningstar controllers use SOC calculations? text/plain English 09.28.2011 01
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Tech Note 1.00 b txt

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Do Morningstar Controllers regulate according to SOC (State of Charge) calculations?

No. Morningstar Controllers regulate according to battery voltage setpoints. Because battery health and other factors affect charging over time, using voltage setpoints is a way to naturally track these changes and affords the user a complete understanding of the controllers operation. SOC calculations and algorithms may not be precise under all conditions and may leave the user with a “fuzzy” understanding of the workings of the unit.

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Green flashing LED with no solar input to controller text/plain English 09.13.2014 01
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Tech Note 34.00 b txt

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If no input source (solar) is connected to the charge controller, but there are other charging sources connected to the batteries, charge controller may still show a Green Flashing LED (indicating that the controller is in the absorption charging stage). The Green Flashing LED may appear on the Morningstar controller if the battery voltage is at or above the controller’s Absorption charging voltage setting. Although the controller is not delivering power to the batteries (because there is no input source present), the indication still appears. This is not an indication of controller malfunction.

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Higher voltage array with a lower voltage battery text/plain English 09.28.2011 01
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Tech Note 1.00 b txt

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A higher voltage solar array (e.g. 24V nominal) can only be used with a lower voltage battery bank (e.g. 12V nominal) if the controller used is an MPPT controller.

PWM controllers CANNOT be used to charge a lower-voltage battery bank with a higher-voltage solar array. Please use an MPPT style controller if this is required.

 

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Noise or Interference During PWM Charging text/plain English 09.28.2011 01
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Tech Note 1.00 b txt

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Pulse Width Modulation (PWM) charging may cause interference in sensitive loads in the system during charging. The SunSaver switches current at 300 Hz. PWM switching noise can sometimes be heard in the controller itself, the wiring or wiring connections, or the system loads. AM radios and CB radios are especially prone to PWM interference. Noise in the controller or wiring is caused by mechanical resonance when current is switched through the circuits. There is little that can be done to remedy this issue. However, noise/interference in the system loads can usually be reduced or eliminated by the following:

1) Minimize cable runs between components

2) Twist power pairs(+/-) to reduce radiated noise

3) Good system grounding

4) Add capacitance across load power(at load input, 22000uf or more)

5) Add a line filter. some have had success with car audio filters that eliminate alternator whine. If these measures do not eliminate or reduce interference to acceptable levels, the controller can be modified to reduce the switching frequency. The 3rd generation SunSaver has a wire loop under the faceplate. If this loop is cut, the controller will reduce the switching frequency to ~1 Hz. Refer to the SunSaver Operator’s Manual for more information.

6) Some Morningstar controllers allow for operation in a ‘low-noise’ state. Check your controller documentation for details.

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Reverse discharge protection at night text/plain English 09.12.2014 01
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Tech Note 34.00 b txt

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All Morningstar controllers will automatically prevent reverse discharge of the battery back through the solar array during the night. No external diodes on the input of the controller are required.

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Using a DC power supply as a PV panel substitute? text/plain English 03.05.2009 01
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Tech Note 1.00 b txt

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Can I use a power source other than a PV panel to charge my batteries?

We do not recommend using a DC power supply with any of our PWM controllers. While they appear to be similar to PV modules in function, DC power supplies have considerably more output capacitance. Connecting a DC power supply to our PWM controllers may cause excessive heating and premature failure. MPPT controllers can be used for this purpose without issue. In addition, AC powered battery chargers are often the best option for systems requiring AC battery charging.

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Using multiple controllers with one PV array application/pdf English 09.28.2011 01
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Tech Note 71.50 Kb pdf

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Can I wire multiple controllers in parallel off the same PV array to charge different batteries?

Yes. Refer to the document, “Charging Isolated Battery Banks”. This can ONLY be done with PWM controllers. MPPT controllers cannot be used in this configuration.

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What is PWM charging? application/pdf English 12.11.2007 01
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Tech Note 313.43 Kb pdf

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PWM is an acronym for Pulse Width Modulation. When the battery is recharged to regulation voltage, the controller will begin limiting the amount of current into the battery so that the regulation voltage is maintained but not surpassed. The method of regulating the current, referred to as PWM, pulses current into the battery with pulses of a varying width. Wider pulses allow a greater percentage of the input current to flow into the battery, narrower pulses restrict current to a lower percentage. Refer to the accompanying download,  “Why PWM?”, for more technical and detailed information concerning PWM charging.

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What is the PWM switching frequency? text/plain English 05.13.2013 01
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Tech Note 1.00 b txt

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All Morningstar PWM type controllers have a PWM switching frequency of ~300Hz.

Some Morningstar PWM controllers have a feature which will reduce the switching frequency to ~1Hz (called on/off charging). This on/off charging virtually eliminates switching noise (both radiated and conducted) and can be used when experiencing noise problems with 300Hz switching operation.

Current models with this on/off charging option are:

– SunSaver Generation 3

– SunSaver Duo

– ProStar PWM

– TriStar PWM

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Why PWM? application/pdf English 11.07.2012 01
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Tech Note 231.60 Kb pdf

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Frequently Asked Questions about PWM battery charging are addressed.

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Will other charging sources backfeed into my controller? text/plain English 09.12.2014 01
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Tech Note 34.00 b txt

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Other charging sources can be used in parallel with the Morningstar charge controller; you do not need to isolate the controller from the battery. For best performance when using other charging sources, ensure the charging source and Morningstar controller are set to charge to the same (or close) voltage. If the supplemental charging source is set to a higher charging voltage than the Morningstar controller, the Morningstar controller may go into a fault state temporarily when the battery voltage rises higher than the controller’s setpoint. The controller will automatically recover from this state when the battery voltage drops to a lower level.

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Wiring multiple controllers to one battery bank? text/plain English 12.10.2007 01
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Tech Note 1.00 b txt

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Yes. There can be as many Morningstar controllers as required in parallel on the same battery bank. For best performance, set each controller to as close a charge setting as possible. Since the controllers will not have direct communication with each other, it is not unusual to see the controllers transition between charging stages at different times. This is generally not a concern.

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Title Type Language Date Version Rating
SunKeeper-12 Angled Product Photo image/png English 10.09.2013 01
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SunKeeper-12 Angled Product Photo 245 KB

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SunKeeper-12 Straight Product Photo image/png English 10.09.2013 01
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SunKeeper-12 Straight Product Photo 207 KB

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SunKeeper-6 Angled Product Photo image/png English 10.09.2013 01
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SunKeeper-6  Angled Product Photo 251 KB

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SunKeeper-6 Straight Product Photo image/png English 10.09.2013 01
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SunKeeper-6 Straight Product Photo 207 KB

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Title Type Language Date Version Rating
SunKeeper CAD Files application/zip English 05.24.2020 01
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Cad file 347.83 Kb zip

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Title Type Language Date Version Rating
2014-2015 Product Catalog in English application/pdf English 05.14.2014 01
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Corporate 4.70 Mb pdf

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The 2014/2015 Morningstar Product Catalog in English

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Company Profile (video) video/x-ms-wmv English 10.16.2012 01
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Corporate 70.29 Mb wmv

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Short video highlighting Morningstar Corporation’s history and products.

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Intl-Warranty application/pdf English 10.17.2013 01
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Corporate 98.02 Kb pdf

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Morningstar Product Warranty

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RoHS Certification Document application/pdf English 02.19.2014 01
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Corporate 81.08 Kb pdf

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The part numbers listed within are in compliance with Directive 2011/65/EC on the restriction of the use of certain
hazardous substances in electrical and electronic equipment (RoHS directives). This document also certifies that
the product declaration that has been provided by Morningstar Corporation is accurate.

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Strong R&D Capability and Engineering Excellence application/pdf English 08.02.2013 01
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Corporate 119.38 Kb pdf

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Whitepaper on Morningstar’s s high-level of innovation, R&D and engineering excellence.

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SunKeeper Declaration of Conformity application/pdf English 08.24.2019 02
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Corporate 136.84 Kb pdf

Description:

Documentation certifying that the Sunkeeper conforms to the European testing requirements outlined by:

  • EN 61000-6-1:2007 EMC Immunity, Industrial Environments
  • EN 55022:1998 (Class B) +A1:2001+A2:2003 Emissions
  • Hazardous Locations Class I, Div.2 Groups A-D:
    ANSI/ISA 12.12.01-2011, Approved 24 August 2011
    CSA C22.2 No. 213-M1987, reaffirmed 2008
  • REACH EC 1907/2006 compliant
  • Electromagnetic Compatibility Directive 2004/108/EC
  • FCC (Title 47 of CFR), Part 15 Subpart B Class B digital device

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Tech Support Policy application/pdf English 09.11.2014 01
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Corporate 76.48 Kb pdf

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Warranty Claim Procedure application/pdf English 09.11.2014 01
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Corporate 97.76 Kb pdf

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Weights and Dims application/pdf English 12.16.2015 02
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Corporate 289.03 Kb pdf

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PDF file of the packed Weights and Dims of Morningstar products.

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