Solar Photovoltaic Grid-Connected Inverter SG3K6TL-S

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1. Structure of Solar Photovoltaic Grid-Connected Inverter SG3K6TL-S 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, Africa and Europe. Available for hand installation, no need for lifting machinery




2. Main Features of the Solar Photovoltaic Grid-Connected Inverter SG3K6TL-S

• Max. input voltage 600V, compatible with different PV panel and string design

• Only 9kg, easy for handling and installation

• Max. Efficiency at 98.0%


• Ultra-quiet, suitable for residential use

• Access to home WiFi system, easy to enjoy the online monitoring

• Wireless communication design, intelligent mobile phone local and remote monitoring


• Product certification: TÜV, CE, AS4777, AS/NZS 3100, VDE AR N 4105

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



3. Solar Photovoltaic Grid-Connected Inverter SG3K6TL-S Images





4. Solar Photovoltaic Grid-Connected Inverter SG3K6TL-S Specification

Input Side Data


Max. PV input power


Max. PV input voltage


Startup voltage


Nominal input voltage


MPP voltage range


MPP voltage range for nominal power


No. of MPPTs


Max. number of PV strings per MPPT


Max. PV input current


Max. current for input connector


Output Side Data


Nominal AC output power


Max AC output powerPF=1


Max. AC output apparent power


Max. AC output current


Nominal AC voltage

230Vac (Single phase)

AC voltage range

180~276Vac (May vary as per corresponding country’s grid standard)

Nominal grid frequency


Grid frequency range

4555Hz/5565Hz (May vary as per corresponding country’s grid standard)


< 3 % (Nominal power)

DC current injection

<0.5 %In

Power factor

>0.99@default value at nominal power, (adj. 0.8 overexited~0.8 underexcited)



Anti-islanding protection




DC reverse connection protection


AC short circuit protection


Leakage current protection


DC switch


DC fuse


Overvoltage protection


System Data


Max. efficiency


Max. European efficiency


Isolation method


Ingress protection rating


Night power consumption


Operating ambient temperature range

-25~60 (>45 derating)

Allowable relative humidity range


Cooling method

Natural cooling

Max. operating altitude

4000m (>2000m derating) 


LED, LCD(optional)


WiFi (optional)

DC connection type


AC connection type

Plug and play connector




VDE-AR-N-4105, VDE0126-1-1,CE,G83/2,


Mechanical Data


Dimensions (W×H×D)

300*370*125 mm

Mounting method

Wall bracket




5. FAQ of Solar Photovoltaic Grid-Connected Inverter SG3K6TL-S

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.


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Q:What is the difference between a PV inverter and a solar inverter?
The main component of the inverter is the three-phase bridge converter. The main purpose of the grid-connected inverter is to change the power to DC and change the AC power. The main purpose is to improve the power quality (because the wind power generation is very large
Q:Is the PV inverter a current source or a voltage source?
Photovoltaic inverter, also known as power regulator, according to the inverter in the use of photovoltaic power generation system can be divided into two kinds of independent power supply and grid.
Q:The working principle of photovoltaic grid - connected inverter
Full-bridge inverter circuit to overcome the shortcomings of the push-pull circuit, the power transistor to adjust the output pulse width, the output AC voltage RMS that changes. Since the circuit has a freewheeling circuit, even if the inductive load, the output voltage waveform will not be distorted. The disadvantage of this circuit is that the upper and lower arms of the power transistor are not common, so you must use a special drive circuit or use isolated power supply. In addition, in order to prevent the upper and lower arm co-conduction, must be designed to turn off after the conduction circuit, that must be set dead time, the circuit structure is more complex.
Q:How the output voltage of the PV inverter and the grid-connected voltage are determined
Inverter is the DC power (battery, battery) into alternating current (usually 220V, 50Hz sine wave). It consists of inverter bridge, control logic and filter circuit. Widely used in air conditioning, home theater, electric wheel, power tools, sewing machines, DVD, VCD, computer, TV, washing machine, range hood, refrigerator, video recorders, massage, fan, lighting and so on. In foreign countries
Q:What is the difference between a grid-connected inverter and an off-grid inverter? What are the advantages of a hybrid inverter?
Grid-connected inverter will be directly sent to the power grid, so to track the frequency of the grid, phase, the equivalent of a current source. Of course, there are some inverters that have a low-pressure through the ability to do PQ adjustment.
Q:PV grid-connected inverter and independent inverter in the control of what is the difference
The independent inverter in the output voltage phase amplitude of the frequency control is initially set good. Independent inverter, you should refer to off-grid inverter, do not need to consider the grid situation.
Q:The function of photovoltaic grid - connected inverter
Finally, a sinusoidal AC output for a grid-connected photovoltaic power generation system is generated by a low-pass filter.
Q:Installation and maintenance of photovoltaic grid - connected inverter
photovoltaic systems Power generation system used in the cable must be connected firmly, good insulation and specifications appropriate.
Q:After the PV inverter, how to achieve the same period before the network?
It can automatically detect the generator and the grid frequency and voltage, in the frequency, voltage, phase are in line with the requirements of the grid to set the time before the release of the closing signal, so that it can be safely and securely connected.
Q:In a photovoltaic grid-connected project, the role of the inverter is to convert the voltage into AC 220V or 380V for the grid, since the transformer will raise the voltage again
Spontaneous use is a way of grid, that is issued to the electricity, mainly their own family or internal use, the excess part of the power to the grid

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