• 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:How does the input voltage range affect the performance of a solar inverter?
The input voltage range directly affects the performance of a solar inverter. If the input voltage falls below the minimum range, the inverter may not be able to convert the DC power from the solar panels into usable AC power efficiently or at all. On the other hand, if the input voltage exceeds the maximum range, it can potentially damage the inverter. Therefore, it is crucial to ensure that the input voltage remains within the specified range for optimal performance and longevity of the solar inverter.
Q:Can a solar inverter be used with different types of mounting systems?
Yes, a solar inverter can be used with different types of mounting systems. The inverter is responsible for converting the direct current (DC) produced by solar panels into alternating current (AC) that can be used to power household appliances. The mounting system is independent of the inverter and is designed to securely hold the solar panels in place. As long as the inverter is compatible with the electrical specifications of the solar panels, it can be used with various types of mounting systems such as rooftop, ground-mounted, or tracking systems.
Q:Can a solar inverter be used for three-phase power systems?
Yes, a solar inverter can be used for three-phase power systems. Three-phase solar inverters are specifically designed to convert the DC power generated by solar panels into AC power for three-phase electrical systems. These inverters are capable of handling higher power loads and are commonly used in commercial and industrial settings where three-phase power is required.
Q:How does a solar inverter handle voltage and frequency regulation?
A solar inverter handles voltage and frequency regulation by converting the direct current (DC) generated by solar panels into alternating current (AC) that is suitable for use in homes and businesses. It ensures that the voltage and frequency of the AC output are within the acceptable range set by the grid or electrical appliances. This is achieved through the use of control circuitry and algorithms that continuously monitor and adjust the DC input to maintain a stable and consistent AC output.
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:Can a solar inverter be used with other renewable energy sources like wind or hydro power?
Yes, a solar inverter can be used with other renewable energy sources like wind or hydro power. Inverters are designed to convert the direct current (DC) generated by these renewable sources into alternating current (AC) that can be used to power homes or businesses. By integrating multiple renewable energy sources through a single inverter, it becomes possible to create a more diverse and reliable renewable energy system.
Q:Can a solar inverter be used with electric vehicles?
Yes, a solar inverter can be used with electric vehicles. It allows for the conversion of DC power generated by solar panels into AC power that can be used to charge the electric vehicle's battery. This helps to make the charging process more efficient and environmentally friendly by utilizing renewable energy sources.
Q:What are the potential risks of over-discharging a battery connected to a solar inverter?
The potential risks of over-discharging a battery connected to a solar inverter include reduced battery lifespan, decreased battery performance, and potential damage to the battery cells. Over-discharging can lead to deep cycling, causing the battery to degrade faster and lose its capacity to hold a charge effectively. This can result in shorter backup power duration during periods of low solar generation. Additionally, excessive discharge can cause irreversible damage to the battery cells, leading to reduced overall battery performance and potential safety hazards.
Q:What is the maximum number of solar panels that can be connected to a single inverter?
The maximum number of solar panels that can be connected to a single inverter depends on the specifications and capacity of the inverter. However, there is no fixed number as it varies depending on factors such as the size and wattage of the panels, the voltage and capacity of the inverter, and the overall system design. It is recommended to consult the manufacturer's guidelines or a professional installer to determine the maximum number of panels that can be connected to a specific inverter.
Q:Can a solar inverter be used with a solar-powered electric vehicle charging infrastructure?
Yes, a solar inverter can be used with a solar-powered electric vehicle charging infrastructure. The solar inverter is responsible for converting the DC (direct current) power generated by the solar panels into AC (alternating current) power that can be used to charge electric vehicles. It ensures efficient and safe charging of electric vehicles using solar energy.

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