Why We Don't Sell Solar Trackers

What it is:

A solar tracker rotates the solar panels so they are pointed at the sun all day long.

How it works:

Solar trackers can be single or dual plane:

  1. Single plane trackers - tilt the panels for the optimal angle to the sun.  Alternately, they can rotate the panels to follow the sun from east to west.
  2. Dual plane trackers - Both rotate and tilt the panels so they are optimally pointed at the sun all day long.

Solar trackers use two pointing technologies

  1. Motors - These have sun sensors and track the sun with a stepping motor that moves the whole tracker to follow the sun. Since the solar panels and other equipment are very heavy the motors have to fight the wind and snow so these need to be big and expensive motors.
  2. Gas/Liquid - These have large tubes filled with a liquid.  The liquid vaporizes when the sun hits the tubes and the displacement of the liquid to a gas changes the weight of different sides of the tracker array and causes it to shift position without using power.

The problems:

  1. These are mechanical devices so they wear over time and break down
  2. They need regular maintenance
  3. They typically carry much shorter warranties than the 25yr warranty on the panels and micro-inverters.  This means you need repairs or replacements over the lifetime of the panels.
  4. They are not cost effective - The cost of the tracker is higher than the increased efficency of the panels is worth.  Spending the money a tracker costs on additional panels will produce more power than the tracker will.  This was not always the case but the recent drop in panel costs has made trackers cost prohibitive.
  5. Trackers are complex to install so they increase the installation cost by requiring an expert to install them.

Anapode Solar is comitted to promoting solar power for the masses.  This means cost effectiveness, simple installation and long warranties.  Trackers do not acheive these goals so we reject them.