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Single Axis Solar Trackers

:: Single Axis Trackers (SAT) ::

What is a Single Axis solar Tracker ?

All Single Axis Solar Tracker Racking, all track the sun on One axis, being East to West!

There are several types of follow the sun from Sunrise to Sunset as the sun moves through the sky from east to west.

  1. Horizontal Flat Row Racking Tilted Panels Racking is the Racking that harvests the most energy.
  2. Tilted Azimuth Rotation Single-Axis Racking looks like a DAT unit, but only rotates in a circular motion.
  3. Horizontal Flat Row Flat Panel SAT Racking, is the common racking where the panels flat to the ground.
  4. Commercial Long-span or Linked Long-span Single-Axis Trackers consist of hundreds of panels controlled by one mechanism that rotates all the panels uniformly from East to West on a single axis.

The single-axis can be oriented so that the cells stand up with two tilts a Polar axis or lie flat called a Horizontal axis).

  • Horizontal axis are more suitable for small latitudes (locations in the tropics and closer to the equator), i.e. most Northern Australia.
  • Polar axis are more suitable for larger latitudes (locations far from the equator), i.e. Southern Australia.

The advantages of single-axis trackers (SAT) are they are less complicated, and less components than Fixed Tilted Racking, thus less expensive & quicker to install. The big difference is the long term Harvesting is superior as can be seen in this graph, solar trackers capture much of the benefit of solar tracking. In locations closer to the equator where the sun’s arc through the sky is less variable through the day and through the seasons, single-axis trackers are particularly effective.

Performance of Fixed Flat Panels v Solar Trackers in Australia

A solar tracker increases the harvesting performance of solar PV panels in the shoulder periods of the day, where a static fixed mount panel would only receive obscured sun exposure. This can be seen in the graphs of side by side solar tracking panels & static fixed pane.

Using Single-axis Tracking with Tilted Azimuth rotational is a little better as you can change the Latitude tilt to suit your location.

Single Axis Tracking Configurations

Single Axis Movements. Single Axis Movements. Single Axis Slew Drive.

Single-Axis Slew Bearing,

without Motor.

 

Residential 4 Panel Single Axis Tracking Unit.

 

Small solar farm Horizontal flat span East/West Tracking.

Single Axis Slew Drive.   Single Axis Slew Drive.   Single Axis Slew Drive.

Horizontal rotation Long span, East/West Single-Axis Tracking Racking.

 

Horizontal rotation Tilted 96 panel long span, East/West Single-Axis Tracking.

 

Long span, East/West Single-Axis Tracking Array.

Single Axis Slew Drive.   Single Axis Slew Drive.   Single Axis Slew Drive.

16 Panel, Tilted

Single-Axis Tracking Array.

 

Korean Single-Axis Tracking Array.

 

360 panel long-span Single-Axis Tracking racking.

Crated DAT Kits.   CratedDAT Kits.   Crated Solar Panels.

Crated DAT Kits.

 

Crated DAT Kits.

 

Palletised Solar Panels.

NB: Solar Arrays without Battery storage, will provide little return on investment using the 6~8 cents/kWh Retailer feed-in tariff, thus you will simply remained enslaved to the deceptively named electrical Retailers, by choosing to continue paying the retail price for power after sunset!

The purpose of Solar Tracking is to harvest substantially more energy than a standard fixed flat or tilted panel array, by improving harvesting increases independence, when solar is used with battery storage, it is useless sending energy for the low feed-in tarrif before the Battery storage is full, Batteries will eventually get fully charged from time to time, especially if your power usage reduces or you choose to generator more power via other methods like Aqua or Wind, or even Green Generator operating on Bio-Gas that can easily be produced in your back yard via a Bio-Digester.

In early 2019 a leading Australian company Power Ledger started offer a Secure Direct Payment system between the Energy Producer (inc. farms with any green energy & storage) directly to Consumer, this offers a seamless Payment system that cuts out the middle man, the "Energy Retailer", this exciting business works for Remote locations & Urban people to take-up Peer-to-Peer (P2P) Energy Trading.  read more...

Commonly in most states a 5~10kW Inverter is the maximum size allowed to feed energy into the state grid, fitting a solar tracker system without Batteries, only allows you to better minimise your energy bills, by usually exporting over 60~80% of your daytime energy into the State Grid for little return, many people simply fail to understand and miss the point of becoming Independent, by simply generating a small income where no other means are available.

For a small 1.3kWh installation the up front cost with a tracker is higher, and the payback period is a little longer.  In reality, investing the same amount on additional solar cells would yield higher generation volume, with little financial return/income to the system owner without battery storage.   We only recommend purchasing a Hybrid inverter, and 350W or larger solar panels, don't be fooled into purchasing 200~270W solar panels, as they harvest 30% less power for the next 25 years and more panels are required, creating a larger footprint to produce the same energy.

 

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