Peak Power Tracking

Operation Features

An advanced, field-proven, Maximum Peak Power Tracker (MPPT) algorithm integrated within the PV225S control software ensures the optimum power throughput for harvesting energy from the photovoltaic array. The peak power voltage point of a PV array can vary, primarily depending upon solar irradiance and surface temperature of the PV panels. This peak power voltage point is somewhat volatile, and can easily move along the I-V curve of the PV array every few seconds. The MPPT algorithm allows the PV225S to constantly seek the optimum voltage and current operating points of the PV array, and maintain the maximum peak PV output power.

Accessible via the UFCU, there are five user settable parameters that control the behavior of the maximum peak power tracker within the PV225S. As show in Figure 1-1 on page 1–4, user settable parameters include:

•PPT V Ref (ID# 37),

•I PPT Max (ID#42),

•PPT Enable (ID# 44),

•PPT Rate (ID# 45), and

•PPT V Step (ID# 46).

Upon entering the Power Tracking mode, it takes approximately 20 seconds for the PV225S to ramp the PV voltage to the “PPT V Ref” setpoint regardless of the actual PV voltage.

With the “PPT Enable” set to “0” (power tracker disabled), the PV225S will regulate the DC Bus at the “PPT V Ref” setpoint. Regulating the DC bus means drawing more or less current out of the PV array to maintain this desired voltage.

With the “PPT Enable” set to “1” (power tracker enabled), followed by the expiration of the “PPT Rate” (MPPT decision frequency), the MPPT will reduce the reference voltage by an amount equal to the “PPT V Step” value.

At this point the MPPT will compare the amount of AC output power produced to the previous amount of AC power produced by the PV225S. If the output power has increased, the next change made (after “PPT Rate” has again expired) to the reference voltage, will be in the same direction.

Conversely, if the power comparison proves undesirable, the power tracker will reverse the direction of the change to the “PPT_V Step”. The MPPT algorithm within the PV225S will then continue this ongoing process of “stepping and comparing” in order to seek the maximum power throughput from the PV array.

The changes made by the MPPT to the reference voltage are restricted to ± 20% of “PPT V Ref” and by the maximum and minimum PV input voltage (600 and

300 volts respectively). Also, the MPPT will not attempt to produce power greater than that allowed by the “I PPT Max” setpoint. If available PV power is above the maximum allowable power level of the PV225S, the MPPT will increase voltage as needed to maintain output power below rated maximum.

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PV225S-480-P specifications

The Xantrex Technology PV225S-480-P is a state-of-the-art power conversion solution designed to meet the needs of solar energy systems. As the demand for renewable energy sources continues to rise, the importance of efficient inverters becomes paramount. This model stands out for its high performance, reliability, and advanced features tailored for both residential and commercial applications.

One of the main features of the PV225S-480-P is its impressive power handling capability, capable of supporting peak loads up to 225 kW. This makes it ideal for large-scale solar installations, ensuring that energy generation meets or exceeds expected outputs. Additionally, the inverter operates at a high efficiency rate, typically exceeding 98%, which minimizes energy losses during conversion and maximizes the overall performance of the solar power system.

The PV225S-480-P utilizes advanced inverter technology that incorporates an innovative digital signal processor. This technology enhances the unit’s ability to track the maximum power point (MPPT) effectively, optimizing energy harvest even under varying sunlight conditions. The ability to adapt to different environmental factors ensures that the system consistently delivers optimal performance throughout the day.

Reliability and durability are crucial characteristics of the PV225S-480-P. Designed with robust materials and rigorous engineering practices, the inverter is built to withstand demanding conditions, including extreme temperatures and potential environmental hazards. Its sturdy design minimizes maintenance requirements, leading to lower operational costs over the inverter's lifespan.

The inverter is also equipped with comprehensive monitoring and communication capabilities. Users can easily access real-time performance data, allowing for proactive maintenance and immediate troubleshooting if issues arise. In addition, the unit supports integration with various energy management systems, enabling users to optimize their energy usage and reduce overall electricity costs.

Furthermore, the PV225S-480-P includes safety features that comply with international standards, ensuring protection against electrical faults and overvoltage. The inverter’s design incorporates fail-safe mechanisms to protect both the unit itself and connected equipment.

In summary, the Xantrex Technology PV225S-480-P is a highly efficient, reliable, and technologically advanced solar inverter. With its strong power handling capabilities, cutting-edge features, durability, and safety aspects, it is an excellent choice for anyone looking to invest in renewable energy solutions that provide long-term savings and environmental benefits.

Xantrex Technology PV225S-480-P manual Peak Power Tracking

Models: PV225S-480-P