Wattsun Horizontal Linear Axis (HZLA) Tracker
  • Item Code: 56006

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  • Wattsun Horizontal Linear Axis (HZLA) Tracker

    More Power for less money.

    Meet the though little brother of Array Technologies' DuraTrack utility solar tracker - the Horizontal Linear Axis Tracker (HZLA). This durable and low-cost tracker offers quick installation and low maintenance for cost-effective commercial and residential projects.

    SMART DESIGN
    Array Technologies' engineers designed the HZLA with simplicity in mind, to enable fast assembly and minimize maintenance.  The HZLA's low profile provides and unobstructed view of the visual landscape while reducing wind forces.
    UTILITY-LIKE DURABILITY
    Many components making up our flagship DuraTrack are used in the HZLA. Bearings have been tested for 30-year reliability, and HZLA actuators have been field-tested for the last 20 yeras on many of our highly regarded Wattsun tracking systems.
    EASY ASSEMBLY
    HZLA's low profile saves installers time because they don't have to climb up and down ladders. And, our proprietary module clamps make assembly quick and easy. 
    MEGA POWER IN LESS AREA
    The HZLA is oriented from north-to-south and tracks 45 degrees to 45 degrees from east-to-west, to capture sunlight from dawn to dusk. Offering the best ground coverage, the HZLA's design reduces shading when adding additional trackers to increase system size. Racking up to 4kW per tracker, the HZLA produces up to 25% more power than a fixed rack. 

    STRUCTURAL & MECHANICAL FEATURES/SPECIFICATIONS
    Tracking Type: Horizontal Single Axis
    Drive Type: Actuator
    Motor Type: 1/15 HP, 24 VDC Nominal
    East-West/North-South Dimensions: Site/module specific
    Array Height: 6 feet
    Recommended Ground Cover Ratio (GCR): 33% standard, flexible
    Tracking Range of Motion: 90 degrees
    Modules Supported: Most commercially available
    Module Configuration: Single module in portrait/module specific
    Module Attachment: DuraTrack high-speed mounting clamps
    Materials: HDG, high-strengh steel & anodized aluminum
    Allowable Wind Load: Tailord to site requirements; up to IBC 90 MPH, 3-second gust exposure C

    ELECTRONIC CONTROLLER FEATURES/SPECIFICATIONS
    Solar Tracking Method: Closed Loop Optical
    Control Electronics: Proprietary
    Tracking Accuracy: + or -2 degrees standard, field adjustable

    INSTALLATION, OPERATION & MAINTENANCE
    Welding Required: No
    In-field Fabrication Required: No 
    Dry-Slide Bearings: No lube required
    Actuator: Grease every 1 year

    GENERAL
    Energy Gain vs. Fixed-Tilt: Up to 25%, site specific
    Warranty: 2 years parts only, 5 year extended available
    Made in the USA: Yes

    Comparison of the Horizontal Linear Axis Tracker and the Seasonal Adjustable Rack
    Horizontal Linear Axis (HZLA) Tracker – A single-axis tracker installed/oriented in the same way as the Duratrack HZ, only it has an individual drive motor in the center of each 4kW (~55’ long) rack.

    Seasonal Adjustable Rack – An adjustable ground rack oriented like a normal row of solar panels (perpendicular to Duratrack HZ orientation).  It has a linear actuator or mechanical gear drive (a socket you can turn with a power drill to adjust the rack) for each 4kW (~55’ long) rack.

    These two products are remarkably similar.  In essence, Wattsun took the concept of a single rotating arm from their popular utility single-axis tracker and applied it to residential and small commercial jobs.  The new products use the Duratrack HZ bearings and module clamps, frame, and drive system.  They replace the drive motors with an individual motor and a linear actuator, respectively.

    The amount of modules the racks can hold is dependent on surface area.  For our 60-cell solar panels (Schott, CSI), it can do 14 modules per rack.  For large ~275w modules, it can do 12 modules per rack.  Up to 18-20 Sanyo-sized modules per rack.

    Each rack will require 5 upright posts, supplied by the end user.  This is similar to Unirac U-LA, but much less pipe required per rack.  They are rated to 90 mph winds, category C exposure (unknown snow-loading capabilities)

    There is roughly 20% increased solar yield from using the HZLA tracker.  It has a tilt range of 90 degrees (45 degrees East-West from horizontal).  For row spacing, allow 20’ – 25’ center to center.  No backtracking, just simple single-axis tracking. 

    The Seasonal Adjustable Rack can do tilts between 5 and 60 degrees oriented South.   Row spacing calculated like any normal tilted array row. 
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