Photovoltaic Grid-Connected Inverter SG50KTL-M

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Product Description:

1. Structure of Photovoltaic Grid-Connected Inverter SG50KTL-M 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

 assistance.

 

2. Main Features of the Photovoltaic Grid-Connected Inverter SG50KTL-M

• High flexibility for complex configurations due to 4 MPP trackers and a wide input voltage range

• High yields due to efficiency up to 98.9% and EU efficiency of 98.5%

• Output power up to 55kVA / 55kW(SG50KTL-M) and 66kVA / 66kW(SG60KTL-M) at power factor of 1

 

• Integrated combiner box: 12 x MC4 connector pairs with DC string fuses, Type II overvoltage protection and DC switch, more safety and lower the system cost

 

• Active power continuously adjustable (0~100%)

• Fulfill a variety of reactive power adjustment requirments with power factor 0.8overexited ~0.8 underexited

• Integrated LVRT and HVRT function

• Includes RS-485 interface, compatible with all common monitoring systems

 

• Product certification: TÜV, CE, G59/3, BDEW, CGC and GB-T19964

Manufacturer certification: ISO 9001, ISO 14001, OHSAS 18000

 

3. Photovoltaic Grid-Connected Inverter SG40KTL Images

 

 

 

 

 

4. Photovoltaic Grid-Connected Inverter SG50KTL-M Specification

Side Data

Max. PV input power

56200W

Max. PV input voltage

1000V

Startup voltage

300V

Nominal input voltage

590V

MPP voltage range

300~950V

MPP voltage range for nominal power

500~850V

No. of MPPTs

4

Max. number of PV strings per MPPT

3

Max. PV input current

104A(26A/26A/26A/26A)

Max. current for input connector

12A 

Output Side Data

Nominal AC output power

50000W

Max AC output powerPF=1

55000W

Max. AC output apparent power

55000VA

Max. AC output current

80A

Nominal AC voltage

3/N/PE, 230/400Vac

AC voltage range

310~480Vac 

Nominal grid frequency

50Hz/60Hz

Grid frequency range

45~55Hz /55~ 65Hz

THD

< 3 %  (Nominal power)

DC current injection

<0.5 %In

Power factor

>0.99@default value at nominal power

(adj. 0.8overexcited ~0.8underexited)

Protection

Anti-islanding protection

Yes

LVRT

Yes

DC reverse connection protection

Yes

AC short circuit protection

Yes

Leakage current protection

Yes

DC switch

Yes

DC fuse

Yes

Overvoltage protection

DC Type II DIN rail surge arrester(40kA)

System Data

Max. efficiency

98.90%

Max. European efficiency

98.50%

Isolation method

Transformerless

Ingress protection rating

IP65

Night power consumption

<1W

Operating ambient temperature range

-25~60(>50 derating)

Allowable relative humidity range

0~100% 

Cooling method

Smart forced air cooling

Max. operating altitude

4000m (3000m derating) 

Display

Graphic LCD

Communication

RS485

DC connection type

MC4

AC connection type

Screw Clamp terminal

Certification

VDE0126-1-1,EN62109-1,EN62109-2,G59/3,

BDEW,GB/T 19964, GB/T 29319 

Mechanical Data

DimensionsW×H×D

665 * 906 * 256 mm

Mounting method

Wall bracket

Weight

70kg

 

 

5. FAQ of Photovoltaic Grid-Connected Inverter SG50KTL-M

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:The working principle of photovoltaic grid - connected inverter
In the small-capacity inverter generally push-pull inverter circuit, full-bridge inverter circuit and high-frequency step-up inverter circuit three, push-pull circuit, the step-up transformer neutral plug connected to the positive power supply, two power Alternating current, the output to get AC power, due to the power transistor to ground, drive and control circuit is simple, and because the transformer has a certain leakage inductance, can limit the short circuit current, thus improving the reliability of the circuit. The disadvantage is the low utilization of the transformer, driving the emotional load is poor.
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:What are the methods of photovoltaic grid-connected inverter control
The square wave output of the inverter using pulse width modulation integrated circuits, such as SG3525, TL494 and so on. Practice has proved that the use of SG3525 integrated circuits, and the use of power FET as a switching power components, to achieve high performance of the inverter, because the SG3525 has a direct drive power FET capability and has an internal reference source and operational amplifiers and Undervoltage protection, so its peripheral circuit is very simple.
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 is the PV inverter starting voltage
The inverter not only has the function of direct current conversion, but also has the function of maximizing the performance of the solar cell and the system fault protection function. (With grid system), automatic voltage adjustment function (for network connection), DC detection function (for network connection), DC grounding detection (for network connection), automatic power control function Function (for grid connection). Here is a brief introduction to automatic operation and shutdown function and maximum power tracking control function.
Q:Photovoltaic grid-connected inverter problem
But Baidu Encyclopedia clearly pointed out: the zero line is the secondary side of the transformer leads the neutral point of the line, and the phase line constitutes a circuit for power supply equipment.
Q:After the PV inverter, how to achieve the same period before the network?
Grid simulator: analog power grid, normal and abnormal conditions, overvoltage, undervoltage, over frequency, under frequency, sudden power failure, etc.
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:What is the difference between low voltage grid connection and medium voltage grid connection?
The difference is that the current at low voltage and the grid is large, the current is small when the voltage is small, followed by the low voltage crossing parameter setting problem (such as PV inverter integrated with inverter and low voltage crossing function, not all photovoltaic inverter
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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