Photovoltaic Grid-Connected Inverter SG4KTL-S

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1.  Structure of  Photovoltaic Grid-Connected Inverter SG4KTL-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 Photovoltaic Grid-Connected Inverter SG4KTL-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.   Photovoltaic Grid-Connected Inverter SG4KTL-S Images






4.  Photovoltaic Grid-Connected Inverter SG4KTL-S Specification


Input Side Data

Max. PV input power4300W
Max. PV input voltage600V
Startup voltage150V
Nominal input voltage345V
MPP voltage range125~560V
MPP voltage range for nominal power240~520V
No. of MPPTs1
Max. number of PV strings per MPPT2
Max. PV input current18A
Max. current for input connector20A 
Output Side Data 
Nominal AC output power4000W
Max AC output power(PF=1)4210W
Max. AC output apparent power4210VA
Max. AC output current18.3A
Nominal AC voltage230Vac (Single phase)
AC voltage range180~276Vac (May vary as per corresponding country’s grid standard)
Nominal grid frequency50Hz/60Hz
Grid frequency range45~55Hz/55~65Hz (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. 0.8 overexited~0.8 underexcited)
Anti-islanding protectionYES
DC reverse connection protectionYES
AC short circuit protectionYES
Leakage current protectionYES
DC switchOptional
DC fuseNO
Overvoltage protectionVaristors 
System Data 
Max. efficiency98.00%
Max. European efficiency97.50%
Isolation methodTransformerless
Ingress protection ratingIP65
Night power consumption<1W
Operating ambient temperature range-25~60℃ (>45℃ derating)
Allowable relative humidity range0~100%
Cooling methodNatural cooling
Max. operating altitude4000m (>2000m derating) 
DisplayLED, LCD(optional)
CommunicationWiFi (optional)
DC connection typeMC4
AC connection typePlug and play connector
VDE-AR-N-4105, VDE0126-1-1,CE,G83/2,C10/11,EN50438,CGC
Mechanical Data 
Dimensions(W×H×D)300*370*125 mm
Mounting methodWall bracket


5.  FAQ of  Photovoltaic Grid-Connected Inverter SG4KTL-S

Q1:Which payment terms can you accept?

A1:T/T,L/C,Moneygram,Paypal are available for us.


Q2:Can we visit your factory?

A2:Sure,welcome at any time,seeing is believing.


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Q:What are the methods of photovoltaic grid-connected inverter control
Sine wave output inverter control integrated circuits, sine wave output of the inverter, the control circuit can be used microprocessor control, such as INTEL company produced 80C196MC, Motorola produced MP16 and MI-CROCHIP company PIC16C73 and so on, these single-chip microcomputer has a multi-channel PWM generator,
Q:Grid-connected inverter is generally divided into photovoltaic power generation grid-connected inverter, wind power grid-connected inverter, power equipment and grid-connected inverter and other power generation equipment power generation inverter.
The small use of field-effect transistors while using a DSP conversion controller to improve the quality of the output power makes it very close to the sine wave current.
Q:What is the difference between a PV inverter and a solar inverter?
The main function of photovoltaic grid-connected inverter is to convert the DC power of the solar PV module into the same frequency as the sinusoidal AC power of the grid (the grid is generally AC power grid, DC can not be directly connected)
Q:What is the difference between low voltage grid connection and medium voltage grid connection?
When the power grid failure or disturbance caused by the power supply and network voltage drop, in the voltage drop range, the power group can be uninterrupted through the inverter and network operation.
Q:Is the PV inverter a current source or a voltage source?
For the inverter for the grid system, depending on whether the transformer can be divided into transformer-type inverter and transformer-free inverter.
Q:Three-phase photovoltaic inverter grid, the use of phase-locked loop is what?
Photovoltaic inverters for grid-connected photovoltaic power generation systems are primarily capable of receiving DC power from photovoltaic arrays and converting them into sine-wave currents of the same frequency and in phase with the access grid for powering the grid or local loads.
Q:How the output voltage of the PV inverter and the grid-connected voltage are determined
due to the higher penetration rate of the car to go out to work or travel can be connected with the inverter battery drive electrical and various tools work. The car inverter output through the cigarette lighter is 20W, 40W, 80W, 120W to 150W power specifications. And then a large number of power inverter power
Q:What is the difference between a grid-connected inverter and an off-grid inverter? What are the advantages of a hybrid inverter?
Offline generally need energy storage, not to send energy to the Internet. Grid has no right to interfere.
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:Installation and maintenance of photovoltaic grid - connected inverter
Before the installation should first check whether the inverter in the transport process for damage. When selecting the installation site, there should be no interference with any other power electronic equipment in the surrounding area.

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