• Photovoltaic Grid-Connected Inverter SG100K3 System 1
  • Photovoltaic Grid-Connected Inverter SG100K3 System 2
Photovoltaic Grid-Connected Inverter SG100K3

Photovoltaic Grid-Connected Inverter SG100K3

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1. Structure of Photovoltaic Grid-Connected Inverter SG100K3 Description

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

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

 It is acritical 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.

Suitable for 50Hz/60Hz grid, could be used in Asia, Australia and Europe.

 

2. Main Features of the Photovoltaic Grid-Connected Inverter SG100K3

* Advanced Technology, Grid-friendly

• Optional low-voltage 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 40%, 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

 

* More Advantages 

• Perfect protection and fault alarm system, safe and reliable

• User-friendly dynamic graphics LCD

• 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 Inverter SG100K3 Images

 

 

4. Photovoltaic Grid-Connected Inverter SG100K3 Specification

Input Side Data

 

Max. PV input power

113KW

Max. PV input voltage

1000V

Set-up voltage

500V

Min. operation voltage

480V

Max. PV input current

236A

MPP voltage range

480~850V

No. of DC inputs

4

Output Side Data

 

Nominal AC output power

100KW

Max. AC output apparent power

110KVA

Max. AC output current

158A

THD

<3%(Nominal power)

Nominal AC voltage

400V

AC voltage range

310V~450V

Nominal grid frequency

50/60Hz

Grid frequency range

47~52Hz/57~62Hz

Power factor

>0.99@default value at nominal power, adj. 0.9 overexcited ~0.9 underexcited

Isolated transformer

Yes

DC current injection

<0.5 % In

Efficiency

 

Max. efficiency

97.30%

European efficiency

96.70%

Protection

 

Input side disconnection device

Breaker

Output side disconnection device

Breaker

DC overvoltage protection

Yes

AC overvoltage protection

Yes

Grid monitoring

Yes

Ground fault monitoring

Yes

Insulation monitoring

Yes

General Data

 

DimensionsW×H×D

806×1884×636mm

Weight

760kg

Operating ambient temperature range

-25~+55

Night power consumption

<40W

External auxiliary supply voltage

No

Cooling method

Temperature controlled air-cooling

Ingress protection rating

IP21

Allowable relative humidity range

0~95% no condensing

Max. operating altitude

6000m(3000m derating)

Fresh air consumption

870m³/h

Display

LCD

Communication

RS485/Modbus, Ethernet(Opt.)

 

 

5. FAQ of Photovoltaic Grid-Connected Inverter SG100K3

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:What is the role of a power factor correction circuit in a solar inverter?
The role of a power factor correction circuit in a solar inverter is to improve the power factor of the inverter, ensuring that the power drawn from the grid is used efficiently. By reducing the reactive power and bringing it closer to the real power, the power factor correction circuit helps minimize energy losses and optimize the overall performance of the solar inverter.
Q:How efficient are solar inverters?
Solar inverters are highly efficient, with most modern models achieving efficiency levels of 95% or higher. This means that they can convert a significant amount of the DC power generated by solar panels into usable AC power for homes and businesses, minimizing energy losses and maximizing the overall efficiency of the solar system.
Q:What is the role of a solar inverter in voltage and frequency regulation during grid disturbances?
The role of a solar inverter in voltage and frequency regulation during grid disturbances is crucial to maintaining the stability and reliability of the electrical grid. During grid disturbances, such as voltage fluctuations or frequency deviations, the solar inverter acts as a control device that helps regulate and stabilize the electrical parameters. In terms of voltage regulation, the solar inverter continuously monitors the voltage level of the grid and adjusts its output accordingly. If there is an increase in grid voltage, the inverter will reduce its output to prevent overvoltage conditions. Conversely, if there is a decrease in grid voltage, the inverter will increase its output to compensate and maintain a stable voltage level. This regulation ensures that the voltage supplied by the solar inverter aligns with the grid's voltage requirements, preventing damage to electrical equipment and ensuring the safe operation of the grid. Similarly, the solar inverter also plays a role in frequency regulation during grid disturbances. The inverter constantly monitors the frequency of the grid and adjusts its output frequency to match the grid's frequency. If the grid frequency deviates from the standard frequency, the inverter will modify its output frequency to bring it back to the desired level. This frequency regulation is essential for maintaining the synchronization of various electrical devices connected to the grid, preventing equipment damage, and ensuring the stability of the grid. Overall, the solar inverter's role in voltage and frequency regulation during grid disturbances is to provide stability and reliability to the electrical grid. It acts as a control device that continuously monitors and adjusts its output to maintain the desired voltage and frequency levels, thus preventing potential damage to electrical equipment and ensuring the smooth operation of the grid.
Q:Can a solar inverter be used with different grid voltages?
No, a solar inverter cannot be used with different grid voltages. Solar inverters are designed to convert the DC power generated by solar panels into AC power that matches the voltage and frequency of the grid it is connected to. Using a solar inverter with different grid voltages can result in inefficient operation or even damage to the inverter. It is important to ensure that the solar inverter is compatible with the specific grid voltage before installation.
Q:What are the common fault indications in a solar inverter?
Some common fault indications in a solar inverter include a sudden loss of power output, frequent or recurring tripping of the inverter, abnormal or fluctuating voltage readings, unusual noises or smells emanating from the inverter, error messages or fault codes displayed on the inverter's screen, and physical damage or visible signs of overheating.
Q:How does a solar inverter handle voltage regulation?
A solar inverter handles voltage regulation by converting the direct current (DC) electricity generated by the solar panels into alternating current (AC) electricity that is suitable for use in our homes and businesses. It ensures that the voltage produced by the solar panels matches the voltage requirements of the electrical grid or the appliances connected to it. This is achieved through advanced electronics that monitor and adjust the voltage levels to maintain stability and efficiency in the power generation process.
Q:How do you calculate the payback period for a solar inverter?
To calculate the payback period for a solar inverter, you need to determine the initial cost of the inverter and the annual savings or earnings it generates. Divide the initial cost by the annual savings or earnings to determine the number of years it will take to recoup the investment. This will give you the payback period for the solar inverter.
Q:PV grid-connected inverter can directly load it?
Grid-connected inverter is like a car file, he first detects the grid waveform, can not detect not boot, and then the PV DC modulation and consistent with the grid waveform, and then hang up.
Q:What are the potential risks of overvoltage in a solar inverter?
The potential risks of overvoltage in a solar inverter include damaging the inverter itself, reducing its lifespan, and potentially causing a fire or electrical hazard. Overvoltage can also lead to the failure of other connected components, such as solar panels or batteries, and may even result in a complete system shutdown. It is crucial to implement protective measures, such as surge protectors or voltage regulators, to mitigate the risks associated with overvoltage.
Q:Can a solar inverter be used with different types of solar charge controllers?
Yes, a solar inverter can be used with different types of solar charge controllers as long as they are compatible with each other. However, it is important to ensure that the voltage and current ratings of the inverter and charge controller are compatible to avoid any damage to the system.

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