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 is the difference between a grid-connected inverter and an off-grid inverter? What are the advantages of a hybrid inverter?
Grid-connected inverter does not need energy storage, but the energy can not be controlled, how much light to send online to the number of online, simply do not want people to the grid does not like.
Q:The working principle of photovoltaic grid - connected inverter
Inverter will be converted into alternating current DC, if the DC voltage is low, then through the AC transformer boost, that is, the standard AC voltage and frequency. For large-capacity inverter, because the DC bus voltage is high, AC output generally does not require transformer boost that can reach 220V, in the small and medium capacity of the inverter, because the DC voltage is low, such as 12V, 24V, It is necessary to design a boost circuit.
Q:Solar grid inverter does not merge into the grid, direct access to the load to the load power supply?
The solar grid-connected inverter is not connected to the grid and can not be directly connected to the load to supply power to the load because there is no voltage.
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:PV grid-connected inverter can directly load it?
Grid-connected inverter is usually equipped with island protection function, can only receive the power grid, if the load directly, the output is disconnected.
Q:Photovoltaic grid-connected inverter problem
Hello, the definition of the zero line is not caused by the transformer three-phase electric tail connection? I now do not understand why there is no isolation transformer AC output marked is N (zero line), and it is not the transformer three-phase power of the tail connection leads to, this is the zero line? The The
Q:Photovoltaic grid-connected inverter without DC emc how will happen
light is obtained by the electrons of the semiconductor device, thus generating electrical energy. This energy conversion of light energy into energy, that is, solar cells. Solar cells, like transistors, are made of semiconductors. Its main material is silicon, and there are some other alloys. High-purity silicon used in the manufacture of solar cells is subject to special purification. Solar cells as long as the sun or light exposure,
Q:The function of photovoltaic grid - connected inverter
In general, single-phase h-bridge is a common configuration of dc / ac-level, but can also be used in three-phase and other configurations.
Q:What is the difference between low voltage grid connection and medium voltage grid connection?
For photovoltaic power plants when the power system accidents or disturbances caused by photovoltaic power plant grid voltage drop, in a certain voltage drop range and time interval, the photovoltaic power plant can ensure that non-off-line continuous operation.
Q:Is the grid side of the grid and the inverter?
Grid-type system power transmission sequence: photovoltaic panels> relays> inverters> relays> electricity load + power grid (both in parallel).

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