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How to Install a Dual-Axis Solar Tracking Unit (DAT)

This page is updated as new information is added.


A DAT should install in an location that Captures the most amount of Sun as possible, preferably without shading from Trees & Buildings etc.

If there happens to be shading, you should consider using half-cut panel & half-cell panel technology, as they are designed to improve harvesting in areas with parcial shading.   Click-Here to see other Solar moduel types.

In the Sydney region a DAT installed in a clear area free of shading, will harvest approx. 11+ hours of Peak Sunlight per day, and the further South of the Equator you live the more energy a DAT unit will harvest, due to the axis of the sun through the sky!

This is the main reasons Fixed Roof-Top Solar can only capture 4~5 hours Peak sunlight per day, as the obscure angle of the sun on the panels greatly reduces the amounts of energy harvested, where this image shows the difference a DAT unit harvests an additional 5+ hours of sunlight.

2) DAT Foundation ::

Installing the foundation for a DAT unit is considered the most difficult part of a DAT installation.

There are three main types of foundations;

  1. Foundation Pole Concreted-in:
    Is the simplest & easiest Foundation to install;
    1. DAT-4 unit requires a 90cm~130cm Foundation Pole, using 50~60cm x 110~150cm deep hole.
    2. DAT-8 unit requires 130cm Foundation Pole, using 50~60cm x 150cm deep hole.
    3. DAT-15 unit requires 230cm~300cm Foundation Pole, using 50~60cm x 250cm~320cm deep hole.

All foundation Poles should have 30cm of concrete beneath the bottom Flange to take the vertical load, we recommended that a few rods of Reo Bar be simply laid horizontally 2cm into the top of the 30cm float.  The 30cm float will stop potential sinking over time.  Keep in mind, a higher Main Mast the higher the solar panel ground clearance will be, and this creates more force in high wind conditions, so the deeper the Foundation Pole the better.
NB: If required a foundation pole can actually be cemented into a free-standing Cement block, for easy re-location if required.

  1. Spider Ground Screw Foundation:
    Is the latest & greatest foundation technology, as it acts like the roots on a Tree, spreading the load across a larger area, and this foundation type does NOT require any Cement, obviously the Ground Screws hold the DAT unit in place, ground screws are manufactured for Sand, Soil, Clay & even Rock.   The Ground Screws are screwed into the ground with either a Portable geared, High-Torque electric drill or a commercial Hydraulic driver mounted on a Excavator/Tractor, make the job a lot Easier, Quicker, Better than a Concrete foundation block, and ground screw foundations use less resources & can be operational on the same day!
  2. Concrete Foundation Block:
    A Concrete Foundation Block is the traditional time consuming method commonly used for larger the DAT units, the larger the DAT the heavier the Concrete foundation block needs to be, and the Cement needs to cure for 7~14 days before assembling the DAT unit.

3) Electrical Cabling & Conduit ::

Electrical Cabling can be done several ways, from laying XLPE wiring above ground, buiried in Conduit or Poles & Wiring.

However the most common way is to run the Cables in Buried Orange Conduit, the legal depth is minimum 60cm deep with Warning Tape laid 20cm above the Conduit to tell anyone digging that there are power cables below.

If running 240V AC Wiring to your DAT, and Solar DC cabling back to your premises, it is better to lay cabling in Conduit, as conduit allows you to add additional wiring if you later decide to add additional DAT units or other solar ground racking & even a Wind Turbine.

With regards to XLPE cable (steel wired Armoured), this can be laid over the ground, But if carrying above 110 volts DC or 50 volts AC, it must be buried in the ground or in conduit complete with Safety tape as above.

4) DAT Performance ::

Yes, Dual-axis Solar Trackers are more complex and hence more expensive to purchase & Install, however, the big pay-off is a DAT requires approx. 1/3 of the solar panels as Fixed Racking to harvest the same energy, eg. a DAT-8 (8 panels) harvests the same energy as 24 solar panels on a Fixed Tilted racking, due to Peak sun only striking Fixed roof-top modules/panels for just 4~5 hours per day, where a DAT captures 11+ hours per day.

Our DAT Kits are purposely over-engineered, each DAT come a minimum 20cm diameter thick walled Mast, Control box with GPS, east~west Tracking via heavy duty 24V Slew-bearing with north~south Tracking via a 24V Linear Actuator.

These DAT studies shows how Dual-axis Trackers commonly re-pay the initial investment cost in 3~6 years, depending on the system, this is done by replacing your energy/power bill and self consuming all the energy produced, this can only be done when you incorporate Energy Storage, then the system owner will no longer have a energy bill for the next 25+ years, obviously having the correct energy storage capacity is the turn-key part of a system.

What great about a Energy Storage ? It first & foremost store what would normally be waste/excess energy for later consumption.   So basically, any excess energy not consumed is first used to charged the batteries to full capacity - then during the day you have the choice to automatically sell any remaining excess energy to the State Grid for a feed-in tariff - This simple means that at sun set you will only be consuming your own energy from the Batteries until sun-rise, thus eliminate paying the retail price for energy after sun set & during the day - That is how you become energy independent !

Installing a Dual Axis Trackers & Equipment

Dual Axis Movements. Dual Axis Movements.   Dual Axis Movements.

90cm Foundation Pole should have 20~30cm of cement under the bottom flange, to prevent sinking.


If using an Auger a 40~60cm diameter foundation hole is required, and should be 30cm deeper than the foundation pole cemented length.


The top Flange of the foundation pole should be just above ground level, if not installing in a block of Cement.

Dual Axis Slew Drive.   Dual Axis Slew Drive.   Dual Axis Slew Drive.

DAT-4 Unit:

Wide stand, with 90cm Mast, +90cm Tilt Mast.

Click here to see DAT-4 Kit.


DAT-4 Unit:

Narrow stand unit, morning angle position, with 130cm Mast, +90cm Tilt Mast.


DAT-8 Unit:

8x 60cell Solar Panels with 90cm Mast, with Slew Bearing and Linear Actuator.

NEW Dual Axis Tracker.   NEW Dual Axis Tracker.   NEW Dual Axis Tracker.

DAT-15 in Stow position


Spider Foundation

Dina-Bolt to Concrete slab.


Ground Screw Foundation

Foundation for Soil, Clay or Rock.

NEW Dual Axis Tracker.  

Soil Ground Screw.

Rock Ground Screw.

  NEW Dual Axis Tracker.

Rotational Stop Censor:

inc. Wires, Bolts & Bracket.


WIND Speed Indicator:

inc. Wires, bolts & Bracket.

Ground Earth Screws

Ground Screws are manufactured in various lengths, diameters and are suitable for different ground conditions from Sand, Soil, Clay and special Rock screws are available.

Page last updated: 24-Nov-2019.


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