Satcon Solar Inverter SG3KTL-EC

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1. Structure of Solar Photovoltaic Grid-Connected Inverter SG3KTL-EC Description

A solar inverter, or PV inverter, or Solar converter, converts the variable direct current (DC) output of a photovoltaic (PV) solar panel into a

utility frequency alternating current (AC) that can be fed into a commercial electrical grid or used by a local, off-grid electrical network. It is a

critical BOS–component in a photovoltaic system, allowing the use of ordinary AC-powered equipment. Solar inverters have special

functions adapted for use with photovoltaic arrays, including maximum power point tracking and anti-islanding protection.

2. Main Features of the Solar Photovoltaic Grid-Connected Inverter SG3KTL-EC

• Flexible design due to dual MPP tracking that is equipped to obtain full nominal power, 3-phase supply

• High energy yield due to maximum efficiency up to 98.1%

• Low noise levels and internal consumption due to natural cooling

• Integrated theft protection

• Access to Home WiFi system and enjoy cloud services via smart phones

• Integrated power management function, easy to receive the adjustable command from grid

• Extensive communication: RS-485, Ethernet, WLAN / WiFi, 4 digital inputs for ripple control receivers

• Product certification: TÜV, VDE 0126-1-1, EN 62109-1/-2, CE, G83/1, VDE-AR-N 4105

• Manufacturer certification: ISO 9001, ISO 14001, OHSAS 18000

3. Solar Photovoltaic Grid-Connected Inverter SG3KTL-EC Images

Solar Photovoltaic Grid-Connected Inverter SG3KTL-EC

4. Solar Photovoltaic Grid-Connected Inverter SG3KTL-EC Specification

Input Side Data
Max. PV input power	3191W
Max. PV input voltage	1000V
Startup voltage	200V
Nominal input voltage	610V
MPP voltage range	140~900V
MPP voltage range for nominal power	160~800V
No. of MPPTs	2
Max. number of PV strings per MPPT	1/1
Max. PV input current	19.8A(9.9A/9.9A)
Max. current for input connector	10A
Short-circuit current of PV input	24.8A(12.4A/12.4A)
Output Side Data
Nominal AC output power	3000W
Max AC output power（PF=1)	3000W
Max. AC output apparent power	3000VA
Max. AC output current	4.4A
Nominal AC voltage	3/N/PE,230/400Vac
AC voltage range	310~480Vac(May vary as per corresponding country's grid standard)
Nominal grid frequency	50Hz
Grid frequency range	45~55Hz (May vary as per corresponding country's grid standard)
THD	< 3 % (Nominal power)
DC current injection	<0.5 %In
Power factor	>0.99@default value at nominal power, (adj. 0.8overexcited ~0.8underexcited)
Protection
Anti-islanding protection	Yes
LVRT	No
DC reverse connection protection	Yes
AC short circuit protection	Yes
Leakage current protection	Yes
DC switch	Integrated
DC fuse	No
Overvoltage protection	III
System Data
Max. efficiency	98.0%
Max. European efficiency	96.0%
Isolation method	Transformerless
Ingress protection rating	IP65
Night power consumption	<1W
Operating ambient temperature range	-25~60℃(>45℃ derating)
Allowable relative humidity range	0~100%
Cooling method	Natural cooling
Noise	≤29dB
Max. operating altitude	2000m
Display	Graphic LCD
Communication	Ethernet,RS485（RJ45 connector）, 4×Digital Inputs,Wifi
DC connection type	MC4
AC connection type	Plug and play connector
Certification	VDE0126-1-1,EN62109-1,EN62109-2, G83/1,VDE-AR-N-4105.
Mechanical Data
Dimensions（W×H×D）	403×518×190mm
Mounting method	Wall bracket
Weight	22kg

5. FAQ of Solar Photovoltaic Grid-Connected Inverter SG3KTL-EC

Q1. What is the difference between inverter and solar inverter?

A1. Inverter only has AC inpput, but solar inverter both connect to AC input and solar panel, it saves more power.

Q2. What is the difference between MPPT&PWM?

A2. MPPT has higher efficiency, it can track the max power point and won't waste energy.

Q:Can a solar inverter be used with different types of tracking algorithms?: Yes, a solar inverter can be used with different types of tracking algorithms. The primary function of a solar inverter is to convert the direct current (DC) generated by solar panels into alternating current (AC) that can be used in homes or businesses. Tracking algorithms, on the other hand, are responsible for optimizing the performance of solar panels by adjusting their orientation and tilt angles to maximize sunlight exposure. Solar inverters can integrate with various tracking algorithms to ensure efficient operation and improve energy generation.

Q:Can a solar inverter be used in harsh environmental conditions?: Yes, solar inverters are designed to withstand harsh environmental conditions such as extreme temperatures, high humidity, and exposure to dust, dirt, and corrosive elements. They are built with robust materials and undergo rigorous testing to ensure their durability and reliability in challenging environments. Additionally, some solar inverters come with IP65 or higher ratings, indicating their resistance to water and dust ingress, making them suitable for installation in outdoor and harsh conditions.

Q:How does a solar inverter handle grid faults and disturbances?: A solar inverter is designed to handle grid faults and disturbances by continuously monitoring the grid conditions. In the event of a fault or disturbance, such as a voltage or frequency fluctuation, the solar inverter will quickly disconnect from the grid to ensure the safety of the system. Once the fault is resolved and the grid conditions stabilize, the solar inverter will reconnect to the grid and resume normal operation, ensuring a reliable and stable power supply.

Q:Are solar inverters weather-resistant?: Yes, solar inverters are typically weather-resistant. They are designed to withstand various weather conditions such as rain, snow, and extreme temperatures. However, it is important to note that prolonged exposure to harsh weather conditions could potentially affect their performance and lifespan. Regular maintenance and proper installation can help ensure their durability and longevity.

Q:How does a solar inverter prevent reverse current flow?: A solar inverter prevents reverse current flow by using built-in diodes that act as one-way valves, allowing electricity to flow only in the desired direction from the solar panels to the grid or battery system.

Q:What is the importance of overcurrent protection in a solar inverter?: Overcurrent protection is of utmost importance in a solar inverter for several reasons. Firstly, solar inverters are responsible for converting the direct current (DC) generated by solar panels into alternating current (AC) that can be used to power electrical devices. During this conversion process, there is a risk of an overcurrent situation occurring, where the current flowing through the inverter exceeds its rated capacity. This can lead to overheating, damage to the inverter components, and even fire hazards. Secondly, overcurrent protection ensures the safety of the entire solar power system. By detecting and interrupting the flow of excessive current, it prevents damage to the solar panels, the inverter, and other connected electrical equipment. It also safeguards against electrical shocks and other potential hazards that could arise from an overcurrent situation. Furthermore, overcurrent protection plays a crucial role in maintaining the efficiency and performance of the solar inverter. When an overcurrent event occurs, the inverter can shut down or reduce its output to prevent further damage. This helps to avoid unnecessary downtime and ensures that the solar power system continues to operate at its optimum capacity. Moreover, overcurrent protection is essential for meeting regulatory and safety standards. Many countries and regions have specific guidelines and requirements regarding the installation and operation of solar power systems. Compliance with these standards is necessary to ensure the safety of personnel, protect the environment, and prevent any legal or financial liabilities. In conclusion, overcurrent protection in a solar inverter is critical for the safety, efficiency, and performance of the entire solar power system. It prevents damage to the inverter and other equipment, safeguards against hazards, and ensures compliance with regulatory standards. Therefore, it is essential to implement reliable and effective overcurrent protection mechanisms in solar inverters.

Q:Can a solar inverter be used in areas with unstable grid connections?: Yes, a solar inverter can be used in areas with unstable grid connections. Solar inverters are designed to handle fluctuations and interruptions in the grid power supply. They typically have built-in features such as anti-islanding protection and grid support functionalities that ensure safe operation even in areas with unreliable grid connections. These inverters can switch seamlessly between grid power and solar power, providing a consistent power supply to the connected loads in such areas.

Q:How does a solar inverter protect against voltage fluctuations?: A solar inverter protects against voltage fluctuations by continuously monitoring and regulating the electrical output from the solar panels. It adjusts the voltage and frequency of the direct current (DC) generated by the panels to match the utility grid's alternating current (AC) voltage requirements, ensuring a stable and consistent power supply. Additionally, solar inverters have built-in protection mechanisms such as surge suppression and overvoltage/undervoltage detection, which safeguard the system from voltage spikes or drops, preventing any potential damage to the solar panels or electrical devices.

Q:How does a solar inverter communicate with other devices in a solar power system?: Various communication protocols and interfaces facilitate the interaction between a solar inverter and other devices in a solar power system. One commonly used method involves wired connections, where communication interfaces like RS485 or Ethernet establish a direct link between the inverter and devices like solar panels, batteries, and monitoring systems. In addition to wired connections, wireless communication methods are also employed. Technologies such as Wi-Fi, Zigbee, or Bluetooth allow the inverter to establish connections with nearby devices. This wireless communication primarily serves monitoring and control functions, granting users remote access to manage their solar power system. Effective communication between the solar inverter and other devices is pivotal for optimal performance and efficiency of the solar power system. Vital data, including voltage, current, and temperature, is transmitted from the solar panels to the inverter. This information is critical for achieving optimal power conversion, as the inverter adjusts its operations based on these readings to maximize power output and ensure system safety. Moreover, communication with devices like batteries enables the solar inverter to efficiently manage charging and discharging cycles, optimizing energy storage and utilization. This ensures that surplus energy generated by the solar panels is effectively stored in the batteries and utilized during periods of low sunlight. In conclusion, the communication capabilities of a solar inverter are essential for integrating and coordinating various components within a solar power system. They enable efficient power conversion, monitoring, and control, ultimately maximizing the performance and advantages of solar energy generation.

Q:Can a solar inverter be used with different grid voltages or frequencies?: No, a solar inverter cannot be used with different grid voltages or frequencies. Solar inverters are designed to convert the DC power generated by solar panels into AC power that matches the specific voltage and frequency of the grid it is connected to. Using a solar inverter with different grid voltages or frequencies can result in compatibility issues and potentially damage the equipment.

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