Not for the faint of heart: The biggest, most powerful dual-axis solar tracker available in Canada

Sweet Spot Solar is proud to offer a special product for customers who have big power needs and lots of land.

This is the Sentry Mega. It will follow the Sun throughout the day and change angle by time of year to generate 40% more energy annually than a fixed array.

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It is also huge and will cost in the $100,000 range depending on module and inverter selection, location, and other factors. At that price, the levellized cost of energy (25 years) is 11.12 cents/kWh.

It is approximately 40’ X 40’ and 35’ tall when modules are aimed toward the horizon (winter months). It weighs more than 10,000 pounds.

Previously Sweet Spot Solar commissioned the largest dual-axis solar tracker in British Columbia near Kamloops in the community of Black Pines. Check out our post here. This one is 50% bigger!

It will hold 60 72 cell solar modules, and if we use one of the highest quality and power bifacial modules (the LG 380 Watt), this array will be 22.8 KW DC in size and generate around 36,000 kWh/year of energy [depending on location]. This is enough energy to run more than three average homes in British Columbia. It is the equivalent of a 33 kW static array.

The racking uses a shared rail system that works with virtually all 60 and 72 cell modules with minimal backfacing interference. This is important when using bifacial modules to minimize cutting into energy that could be made on the reverse side of the modules.

The tracker uses astronomical tracking to keep the array perpendicular to the Sun’s position from dawn to dusk. It has a wind speed indicator that protects the array in high wind speeds by putting the tracker into “tabletop” mode - fully horizontal to minimize lift.

In the winter months, solar modules rarely retain snow given the steep angle of the modules and its movement throughout the day. Snow slides right off.

But here’s the big advantage. Compare the following graphs of energy production for an example solar farm of 500 kW capacity. This is a daily snapshot. On the left is a solar farm using dual-axis trackers, while on the right is the same size solar farm composed of static modules (not moving).

The tracker-based solar farm begins to generate maximum power very early in the day and manages to keep the power production in that band until the very last moment possible at the end of the day. By contrast, a fixed solar array has a much smaller “sweet spot” and has lower energy production at the beginning and end of the day.

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Contact Michael at michael@sweetspotsolar.com for more information.

Michael Mehta