Dual-Axis Solar Trackers

Londonderry, NH - Solar PV Tracker and Roof Mount

Series 20 4.7kw dual-axis tracker installed at a home in Londonderry, New Hampshire. This tracker uses GPS to follow the sun and will produce up to 40% more electricity than the same solar panels on a rooftop array.

ReVision Energy now offers dual-axis solar trackers built by Vermont-based AllEarth Renewables.

The AllSun Tracker is a dual-axis active solar tracker which uses a motor and GPS (Global Positioning System) to turn the solar electric panels both from east to west and up and down to ensure the panels always follow the sun's elevation.

Compared to a fixed array of the same production capacity, the AllSun tracker will produce up to 45% more electricity. Flexible size and seamless performance make this tracker well-suited for both residential and commercial installations.

ReVision Energy has partnered with AllEarth Renewables to be the exclusive dealer of AllSun Trackers in Northern New England - we installed the first dual-axis solar tracker in New Hampshire in 2011, and in 2012 we installed the first dual-axis solar tracker in Maine.

How A Solar Tracker Produces Extra Power

AllSun Solar Tracker Maine

The ideal orientation for a fixed solar array is 195° on a compass - a bit west of magnetic south on the compass is "true" south which is ideal for solar installations. A roof pitch of 22.5° (5/12) to 45° (12/12) is great, and up to 45° off-axis is workable depending on how steep the roof is. However, many homes are not ideally oriented for rooftop arrays, or have other technical or aesthetic challenges, which is where a solar tracker can be a fantastic match.

A few of the situations where customers have chosen a tracker over a rooftop array:

  • Flat or rubber roof that would require additional racking to reach ideal angle
  • Desire for maximum production possible. A fixed array just can't compete with a tracker's performance
  • Already maximized solar roof - when you roof is full, a tracker allows you to put on more power! In this case our customer wanted a tracker to provide electricity for two electric cars

While we also install plenty of fixed ground mounted solar arrays, the tracker offers a compelling alternative - more power production in a smaller footprint of yard space. In a clear open field (the best place for a tracker), the tracker will produce up to 45% more power than a fixed solar array (according to manufacturer AllEarth Renewables and validated by real-world data from several ReVision Energy installations). This means - a Series 20 (20x 240W solar panels) will produce roughly as much power as a nameplate rating 6.7KW fixed array!

Stop Motion of a Solar Tracker Being Installed (Oxford, Maine)

Solar Tracker Models Available

Exeter, NH - Solar Power Tracker

The Series 24 AllSun Tracker with standard efficiency panels will produce roughly 9,600 kWh of electricity each year for this home in Exeter, New Hampshire.

AllSun Trackers are available in two sizes - the Series 20, which will carry 20x 240Watt (4.8kw) solar panels, or the Series 24, which will carry 24x 240W solar panels (5.76kw).

The Series 20 is designed for an individual or small family with a modest need for electricity. It will produce up to 8,500 kilowatt hours per year depending on the quality of your site and solar resource of the year.

The Series 24 is designed for a larger family or business and produces up to 10,200 kilowatt hours per year. For those requiring greater amounts of electricity, multiple trackers can be installed with a minimum of 50' separation.

Want to learn more? We would be happy to visit your home for a complimentary evaluation on whether a solar tracker makes sense for you.

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Woolwich, Maine - Tipton House Solar

When I triggered my saw I noticed that the electric meter was running backward from the solar electric panels!

That moment was worth every penny spent on this house. Thank you all.

Ben Tipton
Woolwich, Maine

More Customer Testimonials

More updates from our solar blog with news from Maine, New Hampshire, Massachusetts, and Vermont.