S250

1500 m², Horizontal Single Axis Tracker

same land cover ratio as fixed PV installations

10% increase in the initial project cost

up to 25% more energy intake annually

HIGH INVESTMENT VALUE

BOOST YOUR EARNINGS

The investment cost of an S250 is around 10% higher than that of an equal capacity fixed PV installation, while the power production increase is between 15% to 25%. As a result, if an investor has a fixed size license with an attractive feed-in tariff, he can invest more money, while enjoining a better IRR and NPV on the investment. If an investor has a fixed investment capital, the installed capacity will be around 10% lower, but the total production will be 5% to 15% higher, again pushing the IRR and the NPV of the investment higher.

PREPARE FOR THE FUTURE

A tracker’s energy production curve is almost constant throughout the day, in contrast to a fixed PV installation that produces the majority of the energy during noon. In many countries, there is already a surplus of energy production in noon and a lack of energy production in the morning and the afternoon. This phenomenon will be intensified in the next decades, as solar energy increases its proportion in the electricity generation. Also after the end of the existing PPAs, the solar producers will lose the benefit of the feed-in tariff and will sell their energy at prices driven by the competition. Producers whose installations production curve have a better match to the demand will have an advantage during price negotiations. The S250 also reduces the CAPEX and the LCOE in installations that implement energy storage, since the increase in production hours equals a proportional reduction to the energy storage needs.

ENGINEERING EXCELLENCE

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ENGINEERED TO LAST

The S250’s design is based on our accumulated design knowledge and extensive field experience. Every detail has been thoroughly engineered to have the minimum impact to the levelized cost of electricity (LCOE).

The S250’s design presents high rotational stiffness while keeping the natural frequency close to 2 Hz. It also has exceptional stability in alternating eccentric loads which usually occur during extreme wind conditions.

The high stiffness and stability of the main carrier tube allows the foundations to be 6 m apart, reducing labor and material costs during assembling (compared to the costly narrow spaced foundations). The Drive Mechanism can actuate up to 12 (42 m long, 3 m wide ~20 kWp) Tables, thus enabling almost 250 KWp of PV modules to be installed per single tracker.

HYDRAULIC DRIVE

The S250 uses hydraulic axis drive, which despite its higher cost compared to other technologies, is the only safe choice for harsh environments (proven for decades in earth-moving machinery). The hydraulic circuit is isolated from the environment and the hydraulic oil is constantly filtered by a micro-filter. This makes the operation possible even in the thin dust of a desert, securing reliable and low maintenance operation for many years.

SIX-AXIS HINGE

The innovative Six-Axis Hinge can absorb up to 10 cm of pole misplacement in any direction, it also makes possible the installation on areas with extreme slopes. Slopes up to 17 degrees can easily compensated in the North-South axis, and unlimited slope in the East-West.

Since the Six-Axis Hinge does not interfere with the PV modules during operation, there are no gaps between the PV modules, making the S250 the solution with the best ground coverage ratio in the market.

EASY INSTALLATION

We have optimized every step of the procedure. There is no need for field work (drilling, cutting, welding, etc.) and no need for decisions during assembling, thus eliminating installation errors and the need for expert staff.

The S250 foundation and assembling costs are kept similar to, or in many cases even lower than that of a fixed PV system installation.
The PV-CLAMP saves labor time, as each module needs less than a minute to be clamped on the tracker. Visit the following link to learn more about the PV-CLAMP: www.mechatron.eu/3z7q

installed piles on an open field

INNOVATIVE SOFTWARE

ASTRONOMICAL ALGORITHM

The S250 uses an open loop astronomical algorithm. By using direct GPS information, the Plant Controller CPU solves the astronomical algorithm to find the sun’s position and drives the PV module surface to the most appropriate position against the sun.

BACKTRACKING

During the first or the last hours of the day, where the sun is close to the horizon, the Plant Controller continuously adjusts the slope of the modules as to prevent the Tables from casting shadows to each other.

WEB ADMINISTRATION AND OPERATION

The Plant Controller incorporates a web server, which allows the plant to be accessed through the internet.

The Plant Controller controls and communicates with each tracker while showing the status of the plant a well designed web interface.

Plant operators can log-in from any web browser to see the status of the plant. They are also able to interact with the trackers and make movements or perform any test they wish.

In case that an error occurs, the Plant Controller can inform the operators by sending a message which contains a description and the probable cause of the fault. Messages can be sent via SMS or E-mail.

DESIGN FOR FLEXIBILITY

Polo solar tracker general dimensions

DESIGNED FOR EASY TRANSPORTATION

2MWp worth of trackers can be loaded in just 6 shipping containers.

DESIGNED FOR SIMPLE INSTALLATION

Only 15 different components in total comprise the whole tracker assembly.

7 DIFFERENT FOUNDATION OPTIONS AVAILABLE

Option 1

Single pole on counterweight

Option 2

Triangular mounting on counterweight

Option 3

Single rammed pole

Option 4

Triangular mounting on rammed poles

Option 5

Single pole in concrete pile

Option 6

Triangular mounting on concrete piles

Option 7

Triangular mounting directly on underlying structures

SUITABLE FOR ANY TERRAIN

Easily absorbs terrain abnormalities in the east-west direction

Can be installed on any slope in the east-west direction

Easily absorbs terrain abnormalities in the north-south direction

Can be installed on any slope in the north-south direction

SPECIFICATIONS

MAIN CHARACTERISTICS

  • Type: Modular, horizontal single axis solar tracker (rotation axis orientation south to north parallel to the ground)
  • Range of motion: -48° to +48°
  • Maximum surface area: 124 m² per Table 1488 m² total (12 Tables)

INSTALLATION CHARACTERISTICS

  • Possible Foundations:
    • Rammed pole
    • Concrete pile
    • Concrete ballast
    • Direct mounting on structures
  • Distance between Tables: 5,5 to 8 m (7m recommended)
  • Distance between foundations along a Table: 5 to 6 m
  • Min. distance from ground during operation: 0,5 m
  • Max. height during operation: 2,6 m
  • Ground coverage ratio: 35%-50%
  • Field slope up to 17° by design (or more if a custom solution is required)

ELECTRICAL CHARACTERISTICS

  • 230/400V 3-phase AC ±10%, 50-60 Hz
  • 240/480V 3-phase AC ±10%, 60 Hz
  • Daily energy consumption: 0,25 kW∙h typical / 0,35 kW∙h maximum

DRIVE

  • Type: Hydraulic
  • Maintenance:
    • Annual inspection and greasing of the motion cylinder joints
    • Hydraulic oil and filter change every 5 years

CONTROL

  • Tracking method: Astronomical algorithm (open loop)
  • Tracking accuracy: 1°
  • Measuring system: Inclinometer
  • Backtracking: Yes
  • Monitoring and remote handling: Full, in real time through the internet
  • Plug & Play: uses GPS for time and location

SAFETY

  • Designed to meet all the requirements of Eurocode 3
  • Automatic frame levelling in extreme weather conditions
  • Operating conditions: up 50 km/h at any tracking angle and wind orientation

STRUCTURE

  • Drive: Hydraulic parts sealed from the environment. Able to operate in desert and in any combination of dust and moisture
  • Structural steel elements: Hot-dip galvanized
  • Joints: Dry slide stainless steel spherical bearings (no maintenance required)

ENVIRONMENTAL CONDITIONS

  • Operation temperature range: –20 °C to +60 °C
  • Snow rating: 160 kg/m²