Solar Earth Inc.

Solar Tracker Systems Revolution

Imagine harnessing the full potential of the Sun’s energy and maximizing the output of your solar panels, parabolic troughs, or lenses. With advanced solar trackers, this is now a reality. Solar trackers are ingenious devices designed to optimize the performance of your solar power system by precisely aligning your panels with the Sun throughout the day.

In flat-panel photovoltaic systems, solar trackers play a vital role in minimizing the angle of incidence between incoming sunlight and photovoltaic panels, effectively reducing the cosine error. This optimization leads to a significant increase in energy production from your installed power-generating capacity. Industry experts projected that trackers would be utilized in over 85% of commercial installations greater than one megawatt between 2009 and 2012, and the trend continues to soar.

Thanks to technological advancements, single-axis trackers have witnessed substantial pricing, reliability, and performance improvements. As a result, utility-scale projects are increasingly embracing these cutting-edge systems. Global solar tracker shipments skyrocketed to 14.5 gigawatts in 2017, marking a remarkable 32% year-over-year growth. With the rapid acceleration of large-scale solar deployment, we can expect even greater growth in the years to come.

The significance of solar trackers extends beyond traditional photovoltaic systems. In concentrator, photovoltaic (CPV) and concentrated solar power (CSP) applications, trackers play a pivotal role in optimizing the performance of optical components. These trackers maximize the efficiency of concentrated solar applications by ensuring proper alignment with incident solar radiation. With trackers becoming a standard feature in all concentrator applications, you can rest assured that your CPV or CSP system will operate at peak performance levels, capturing the Sun’s energy with unmatched efficiency.

Types Of Solar Tracker Systems

The wide array of solar tracker systems available, each designed to enhance the efficiency of Sun tracking in solar installations. There are options for different needs and environments, from single- to dual-axis trackers. Dive into the world of solar trackers and unlock the full potential of solar energy generation through advanced tracking technology.

Single Axis Trackers

Single axis trackers are solar tracking systems with one degree of freedom, enabling rotation along a specific axis. Typically, the axis of rotation for single axis trackers is aligned along a true North meridian. However, with advanced tracking algorithms, they can also be aligned in any cardinal direction. Various implementations of single axis trackers exist, including horizontal single axis trackers (HSAT), horizontal single axis trackers with tilted modules (HTSAT), vertical single axis trackers (VSAT), tilted single axis trackers (TSAT), and polar aligned single axis trackers (PSAT). When modeling performance, the orientation of the module about the tracker axis plays a crucial role.

Horizontal Single Axis Trackers (HSAT)

Horizontal single axis trackers are designed with a horizontal axis of rotation parallel to the ground. These trackers can share posts at both ends of the rotation axis, which helps reduce installation costs. HSATs are particularly suitable for regions with low latitudes. 

Field layouts using horizontal single axis trackers offer flexibility, requiring only parallel alignment of rotation axes to position the trackers appropriately. The energy production-to-cost ratio can be maximized by determining the optimal spacing, depending on local terrain, shading conditions, and the time-of-day value of the energy produced. Backtracking is one method used to calculate the panel disposition.

In horizontal trackers, the module’s face is typically aligned parallel to the axis of rotation. As the module tracks the Sun, it sweeps a rotationally symmetric cylinder around the rotation axis. The system comprises a long horizontal tube supported on bearings mounted on towers or frames. The tube’s axis runs on a north-south line, and solar panels are mounted on the tube, allowing it to rotate and track the Sun’s apparent motion throughout the day.

Horizontal Single Axis Trackers with Tilted Modules (HTSAT) follow the same principle as HSAT, but the modules are installed at a certain tilt rather than being mounted flat at 0 degrees. This configuration is often preferred in high latitude locations. HTSAT offers the advantages of vertical single axis trackers (VSAT) while occupying less land space. Consequently, it reduces the overall cost of solar projects.

Vertical Single Axis Trackers (VSAT)

Vertical single axis trackers have a vertical axis of rotation with respect to the ground. These trackers rotate from East to West over the day, making them more effective at high latitudes than horizontal axis trackers. Field layouts for VSATs must consider shading to avoid unnecessary energy losses and optimize land use. 

However, optimizing for dense packing is limited due to the shading patterns throughout the year. Typically, the face of the module in vertical single axis trackers is oriented at an angle with respect to the axis of rotation. As the module tracks the Sun, it sweeps a rotationally symmetric cone around the rotation axis.

Tilted Single Axis trackers (TSAT)

Tilted single axis trackers include all trackers with axes of rotation between horizontal and vertical orientations. The tilt angles of these trackers are often limited to reduce wind profile and decrease elevated end height. With backtracking, they can be densely packed without shading perpendicular to their axis of rotation. 

However, the tilt angle and latitude limit the packing parallel to their axes of rotation. Similar to horizontal trackers, tilted single axis trackers have the module’s face aligned parallel to the axis of rotation. As the module tracks the Sun, it sweeps a rotationally symmetric cylinder around the rotation axis.

single axis solar tracker

Dual Axis Trackers

Dual axis trackers offer even greater flexibility and precision in solar tracking by having two degrees of freedom as axes of rotation. Let’s explore two typical implementations of dual-axis trackers:

Tip-Tilt Dual Axis Trackers (TTDAT)

TTDATs are named for their mounting mechanism, where the panel array is placed on top of a pole. The east-west movement of the display is achieved by rotating it around the top of the stick, while a T- or H-shaped mechanism enables vertical rotation. 

By sharing the posts at either end of the primary axis of rotation, TTDATs help reduce installation costs. These trackers boast great flexibility in field layouts, allowing for low-density positioning to avoid shading between trackers when the Sun is low in the sky. Additionally, tilting the panels closer to horizontal minimizes shading from above and maximizes the total power collected.

Azimuth-Altitude Dual Axis Trackers (AADAT)

AADATs have their primary axis (azimuth axis) aligned vertically to the ground, with the secondary axis (elevation axis) typically perpendicular to the primary axis. Unlike TTDATs, AADAT systems utilize a large ring mounted on the ground, with the array supported by rollers. 

This weight distribution allows AADATs to accommodate much larger arrays than TTDATs. However, the system density may be reduced due to inter-tracker shading, as the AADAT system cannot be placed closer together than the diameter of the ring.

dual axis solar tracker

Tracker Type Selection

When selecting the type of tracker for solar installations, several factors must be considered. These factors include installation size, electric rates, government incentives, land constraints, latitude, and local weather conditions. Each of these elements plays a crucial role in determining the most suitable tracker type for a specific project.

Horizontal Single-Axis Trackers

Horizontal single-axis trackers are commonly employed for large distributed generation projects and utility-scale projects. These trackers offer a combination of improved energy generation, lower product cost, and a simplified installation process, making them economically attractive for large-scale deployments. Moreover, their strong performance in the afternoon is particularly advantageous for grid-tied photovoltaic systems, ensuring optimal production during peak demand periods. 

Horizontal single-axis trackers also enhance productivity during the spring and summer when the Sun is at its highest point in the sky. Their robust supporting structure and simple mechanism contribute to increased reliability, minimizing maintenance costs. Another benefit is that the horizontal placement of panels on the axle tube eliminates the risk of self-shading and allows easy accessibility for cleaning.

Vertical Axis Tracker

A vertical axis tracker revolves solely around a vertical axle, with the panels positioned vertically at a fixed, adjustable, or tracked elevation angle. These trackers, especially those with fixed or seasonally flexible tips, suit regions with high latitudes. The apparent solar path is not significantly elevated in such areas, but the longer days during summer require the Sun to traverse a longer arc.

Dual-axis trackers are often preferred for smaller residential installations and locations with generous government feed-in tariffs. These trackers offer the ability to track the Sun’s horizontal and vertical movement, maximizing energy capture throughout the day.

How much does a solar tracker cost?

How much dough does a solar tracker cost? Well, my friend, these trackers can increase the price of a photovoltaic solar setup. 

Picture this: you’ve got a standard 4-kilowatt ground-mounted solar system, and it looks snazzy at around $13,000. But if you want to throw in some tracking equipment, brace yourself because the numbers start adding up like nobody’s business!

Now, here’s the deal. You could go for a single-axis tracking system on that same array, which will bump the cost to a cool $20,000. Yeah, you heard me right! That’s a whopping 57% premium on top of what you’d pay for the fixed array. But hold your horses because that extra investment only gets you a 35% increase in solar output. Ain’t that a kicker?

But wait, there’s more! If you want to go all out and fancy, you can opt for a dual-axis tracking system. Brace yourself, my friend, because we’re talkin’ about around $26,000 here. Can you believe it? That’s double the entire cost of the fixed ground-mounted system! I mean, talk about splurging!

Solar trackers are not cheap, but you can enjoy some sweet extra solar power if you’re willing to spend the big bucks. Just remember, with great power comes a tremendous hefty price tag!

Pros and Cons of Solar Trackers

Ah, solar trackers are nifty widgets with their fair share of pros and cons. Let’s shed some light on these sun-chasing marvels.

On the sunny side, here are the pros of using solar trackers:

Amped-up Energy: 

Trackers can play tag with the Sun all day, unlike fixed solar arrays. They diligently follow its every move, resulting in higher energy output. With these trackers, you can squeeze every drop of Sunshine and harness its power to the fullest.

Tracker Tailored to You: 

Solar tracker manufacturers like Allearth Solar and First Sunergy have your back in a world filled with options. They offer an array of trackers, ensuring you find the perfect fit for your specific needs. No more settling for one-size-fits-all solutions; it’s all about customization!

Smart Savings: 

Time of Use electricity rates have they got you scratching your head? Well, fear not because solar trackers have got your back. These trackers help you dodge those wallet-crunching grid energy costs by producing energy during peak hours. Who wants to pay extra when they don’t have to?

But hold on; a few cons are lurking in the shadows of solar trackers:

The Pricey Pursuit: 

Brace yourself because solar trackers don’t come cheap. They can be quite the budget busters, easily doubling your project costs. So, if you’re pinching pennies, these trackers might strain your purse strings. Ouch!


With their moving parts and mechanical complexity, solar trackers are prone to breakdowns. That means you’ll have to shell out extra bucks for maintenance. Those unexpected repair bills can dampen the sunny mood, no doubt.

Extra Prep Work: 

Were you thinking of embracing solar trackers? Well, get ready for some additional planning and prep work. You might find yourself digging more trenches for wiring and doing some extra site grading. It’s a hassle, but the sun-chasing life isn’t always a walk in the park.

There you have it, the pros and cons of solar trackers laid bare like a sunbeam cutting through the clouds. Remember, while these trackers can unlock a world of solar potential, they also have their fair share of drawbacks. So, weigh the options, consider the costs, and make an informed choice. After all, harnessing the Sun’s energy is a journey worth exploring, regardless of your chosen path!

Navigating Limited Space: The Benefits of Solar Trackers

Well, solar trackers usually don’t cut the mustard when it comes to residential solar systems. They aren’t all that popular in the residential solar industry, and there’s a good reason.

However, don’t go writing off solar trackers entirely just yet! They do come in handy when dealing with limited space for your installation. If you’re cramped for a room and can’t fit more solar panels, installing a solar tracking system might be the ticket to generating more power in that tight spot. Is that neat? Oh, and don’t forget, they also find their place in those considerable utility or commercial installations. They’re pretty handy in those settings.

Now, here’s the deal. It’s essential to chat with a local solar installer to figure out how much dough a solar tracking system would set you back. No need to worry! Our solar calculator can give you a ballpark figure of the price for solar in your neck of the woods. Plus, switching to solar will show you how much moola you can save on your electric bill. Isn’t that something?

To sum it up, in most cases, solar trackers don’t cut residential solar systems. But they can be a game-changer if you’re dealing with limited space. And hey, for those large-scale utility or commercial setups, they’re worth their weight in gold! Just make sure you consult with a solar installer like SolarEarth INC.

Solar Tracker Arduino


The solar tracker Arduino is equipped with some impressive features. It boasts two degrees of freedom, allowing it to move from east to west using the left-right servomotor and from south to north with the help of the Down Servomotor. Trust me; it’s like having a high-tech, scientific marvel in your backyard.

Now, let’s discuss the sensors placed on these Arduino solar trackers. You’ll find them neatly tucked in dark tubes with tiny openings at the top, precisely designed to detect the Sun’s brilliant illumination. Unlike stationary solar panels, these trackers are directly exposed to those glorious solar rays, resulting in a whopping increase in electricity generation. Depending on your location, this increase can range from 10 to 20 percent!

But wait, there’s more! When you opt for a solar tracker kit from Solar Earth INC., you’re in for a treat. They provide all the essential supplies you need for your tracking system and also offer reliable and sophisticated monitoring and control tools. With their durable and productive solar tracker kit, you’ll experience enhanced production efficiency and gain absolute confidence.

Imagine having remote source devices at your fingertips, like a router, access point, ordinary wall switches, and insulation toolkits. These kits are as trustworthy as an expert in the field. So why choose our top-notch services to elevate your solar tracking system? Not only will it increase the value of your house, but it’ll also boost your electricity production in no time!

Incorporate the Solar Earth INC. solar tracker kit, and you’ll be on your way to maximizing your energy potential. Don’t miss out on this incredible opportunity. Act now, and let the Sunshine’s power be brighter than ever!

Remember, Arduino is the way to go when it comes to solar tracking. Upgrade your solar power system today with state-of-the-art solar trackers and unlock the true potential of solar energy. Experience the future of sustainable power generation and embrace a greener tomorrow.

At Solar Earth Inc, we specialize in providing tailored commercial solar solutions, including financing options that suit the unique needs of businesses. Contact us today  to learn how we can help your business harness the sun’s power and embark on a sustainable energy journey.

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