• UPS as Solar Inverter Photovoltaic Grid-Connected Inverters SG250K3 System 1
  • UPS as Solar Inverter Photovoltaic Grid-Connected Inverters SG250K3 System 2
UPS as Solar Inverter Photovoltaic Grid-Connected Inverters SG250K3

UPS as Solar Inverter Photovoltaic Grid-Connected Inverters SG250K3

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1.  Structure of Photovoltaic Grid-Connected Inverters SG250K3 Description

SG630KTL is using low-frequency isolation transformer for protective purpose. Its wider input voltage range ensures more combinations of

the PV arrays. Moreover, optical fiber isolation technology has been adopted to increase its anti-interference ability under the circumstances

of multiple inverters installation. In addition, optimized circuit and structural design has improved system thermal efficiency which enhancing

system reliability and stability. Reinforced protection functions, including the DC ground fault protection, make it the best product for large

scale PV power plant.

 

 

2.  Main Features of the Photovoltaic Grid-Connected Inverters SG250K3

 

* Advanced Technology, Grid-friendly

LVRT, HVRT and zero-voltage ride through to cope with various grid conditions

SVG function at night, response to grid directives around the clock

Reactive power control with power factor from 0.9 lagging to 0.9 leading

* More Compact, Saving Space for PV Plant

Power density enhanced 50%, one of the central inverters with highest power density in the PV industry

Save installation spaces and lower the plant initial cost

Front maintenance, able to install against the wall, convenient installation and maintenance, saving operation cost of the PV plant.

* Efficient, More Yields

Max. efficiency at 97.3% with transformer

Efficient MPPT control strategy, improve power yields

28335 chips adopted, more accurate calculation, more power yields;

  Intelligent speed regulation cooling concept, low consumption, high efficiency

* More Advantages

Perfect protection and fault alarm system, safe and reliable

User-friendly dynamic graphics LCD

Redundant dual power supply solution improving the system reliability

Efficient PWM algorithm, low consumption of switch

Operate without power derating at -25 - +55

Reliable and continues operation in high altitude environment

Auxiliary heater (opt.)

CGC certification, compliance with BDEW

 

 

3.  Photovoltaic Grid-Connected Inverters SG250K3 Images

 

 

 

SG250K3 PV inverter

 

4.  Photovoltaic Grid-Connected Inverters SG250K3 Specification

MODEL 

SG250K3 

DC SIDE DATA

Max. DC Voltage 

1000Vdc 

Start Voltage

500V

MPP Voltage Range

480~850Vdc 

Min. DC Voltage

480V

Max. DC Power 

284kWp 

Max. Input Current 

592A 

AC SIDE DATA

Rated Output Power

250kW 

Max. AC Output Current

397A

Rated Grid Voltage

400Vac

Grid Voltage Range 

310~450Vac

Rated Grid Frequency

50Hz/60Hz

Grid Frequency Range

47~52Hz/57~62Hz

Output Current THD

<3% (at nominal power)

DC Current Injection

<0.5% of rated inverter output current

Power Factor

0.9(lagging)~0.9(leading)

SYSTEM 

Max. Efficiency 

97.3%(with transformer)

Euro Efficiency 

96.7%(with transformer)

Protection Degree

IP21

Power Consumption at Night

<80W

Operating Temperature

-25~+55°C

Cooling Method

Temperature controlled forced-air cooling

Relative Humidity

0~95%, non-condensing

Max. Working Altitude

6000m (operation with derating above 3000m)

DISPLAY AND COMMUNICATIONS

Display 

touch screen LCD

Standard Comm. Interfaces

RS485

Optional Comm. Interfaces

Ethernet

MECHANICAL DATA 

Dimensions(WxHxD)

1006x2034x850mm

Net Weight

1600kg 

 

 

 

5.  FAQ of Photovoltaic Grid-Connected Inverters SG250K3

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 controlled remotely?
Yes, a solar inverter can be controlled remotely. With the help of advanced monitoring systems and communication technologies, users can remotely access and control their solar inverters. This allows for convenient monitoring of power generation, performance optimization, and troubleshooting from any location with internet connectivity.
Q: What is the difference between a PV grid-connected inverter and an off-grid inverter?
Offline generally need energy storage, not to send energy online. Power grid has no right to interfere.
Q: How long does it take to install a solar inverter?
The time it takes to install a solar inverter can vary depending on various factors such as the complexity of the installation, the size of the system, and the experience of the installer. On average, it typically takes a few hours to a full day to complete the installation process.
Q: How do you connect a solar inverter to the electrical grid?
To connect a solar inverter to the electrical grid, you need to follow a few steps. Firstly, you need to ensure that your solar inverter is compatible with grid connection. Then, you'll need to install an AC disconnect switch and connect it to your main electrical panel. Next, connect the solar inverter output to the AC disconnect switch using appropriate wiring. Finally, hire a licensed electrician to inspect and connect the inverter to the utility meter or main electrical service panel, ensuring compliance with local regulations and safety standards.
Q: What are the advantages of using a solar inverter?
There are several advantages of using a solar inverter. Firstly, a solar inverter converts the direct current (DC) generated by solar panels into alternating current (AC) that can be used to power household appliances and electrical devices. This allows for the efficient utilization of solar energy, reducing reliance on traditional fossil fuel-based electricity sources. Secondly, solar inverters enable the integration of solar power systems with the electrical grid. By synchronizing the generated electricity with the grid, excess power can be fed back into the grid, resulting in net metering or feed-in tariff benefits. This not only reduces electricity bills but also contributes to the overall renewable energy mix, promoting sustainability and reducing carbon emissions. Another advantage is the monitoring and control capabilities provided by solar inverters. Many modern inverters offer real-time monitoring of energy production, allowing users to track the performance of their solar panels and identify any potential issues. Additionally, inverters often come with built-in safety features, such as ground fault protection, to ensure the safe operation of the solar power system. Overall, the advantages of using a solar inverter include efficient conversion of solar energy into usable electricity, integration with the electrical grid, cost savings, environmental benefits, and enhanced monitoring and safety features.
Q: How does a solar inverter handle variations in solar panel tilt and orientation?
A solar inverter handles variations in solar panel tilt and orientation by continuously monitoring the output voltage and current of the solar panels. It then adjusts the power conversion process to optimize the efficiency of power generation based on the tilt and orientation of the panels. This ensures that maximum power is extracted from the solar panels regardless of their position, allowing for optimal energy production.
Q: Are all solar inverters compatible with all solar panels?
No, not all solar inverters are compatible with all solar panels. The compatibility between inverters and panels depends on various factors such as voltage, power rating, and technology used. It is important to ensure that the inverter you choose is specifically designed to work with the type and specifications of the solar panels you have.
Q: Can a solar inverter be used with solar-powered telecommunications systems?
Yes, a solar inverter can be used with solar-powered telecommunications systems. A solar inverter is an essential component in converting the direct current (DC) power generated by solar panels into alternating current (AC) power, which is compatible with telecommunications equipment. This enables solar-powered telecommunications systems to operate efficiently and effectively.
Q: How does a solar inverter communicate with other system components?
A solar inverter communicates with other system components through various methods such as wired connections or wireless technologies like Wi-Fi or Bluetooth. It exchanges information with components like solar panels, batteries, and control systems to monitor and regulate the flow of electricity, optimize energy production, and ensure safe and efficient operation of the solar power system.
Q: What are the advantages of using a transformerless solar inverter?
The advantages of using a transformerless solar inverter include increased efficiency, reduced size and weight, lower cost, and improved reliability. Due to the absence of a transformer, these inverters are more energy-efficient, resulting in higher electricity production from the solar panels. They also have a smaller form factor and weigh less, making them easier to install and transport. Transformerless inverters are typically cheaper to manufacture, leading to cost savings for consumers. Additionally, their simplified design without a bulky transformer reduces the likelihood of component failure, enhancing the overall reliability of the system.

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