Photovoltaic On-Grid Connected Inverter SG20KTL

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1. Structure of Solar Photovoltaic On-Grid Connected Inverter SG20KTL 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 On-Grid Connected Inverter SG20KTL

• Full 20 kW effective power at power factor of 0.9 due to apparent power reserves up to 22.2 kVA

• Photon test results "very good", with a maximum efficiency of 98% (Photon Profi 2-2012)

• Dual MPP trackers control

• Active power continuously adjustable (0~100%)

•Reactive power control with power factor 0.8 overexcited ~ 0.8 underexcited

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

• Product certification: TÜV, CE, CEI 0-21, G59/2, AS4777, BDEW, VDE AR-N-4105, CGC, compliance with Italian medium voltage grid requirement

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

 

3. Photovoltaic On-Grid Connected Inverter SG20KTL Images

 

 

 

 

 

4. Photovoltaic On-Grid Connected Inverter SG20KTL Specification

Input Side Data

Max. PV input power

21000W(10500W/10500W)

Max. PV input voltage

1000V

Startup voltage

300V

Nominal input voltage

620V

MPP voltage range

280~950V

MPP voltage range for nominal power

480~800V

No. of MPPTs

2

Max. number of PV strings per MPPT

3

Max. PV input current

42A(21A/21A)

Max. current for input connector

12A

Output Side Data

Nominal AC output power

20000W

Max AC output power(PF=1)

22200W

Max. AC output apparent power

22200VA

Max. AC output current

33A

Nominal AC voltage

3/N/PE, 230/400Vac

AC voltage range

310~480Vac 

Nominal grid frequency

50Hz/60Hz

Grid frequency range

47~53Hz/57~63Hz

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

No

Overvoltage protection

Varistors

System Data

Max. efficiency

98.00%

Max. European efficiency

97.30%

Isolation method

Transformerless

Ingress protection rating

IP65

Night power consumption

<1W

Operating ambient temperature range

-25~60℃(>45℃ derating)

Allowable relative humidity range

0~100%

Cooling method

Smart forced air cooling

Max. operating altitude

4000m (>3000m derating) 

Display

Graphic LCD

Communication

RS485(RJ45 connector)

DC connection type

MC4

AC connection type

Plug and play connector

Certification

EN62109-1, EN62109-2, EN61000-6-2,EN61000-6-3, VDE0126-1-1,

CEI 0-21, AS/NZS3100, AS4777.2, AS4777.3,

VDE-AR-N-4105, BDEW, CGC

Mechanical Data

Dimensions(W×H×D)

648×686×246mm

Mounting method

Wall bracket

Weight

55kg

 

 

5. FAQ of Photovoltaic On-Grid Connected Inverter SG20KTL

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: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
Unless the power is not issued for their own use, is to be sent to other areas, it needs to boost, such as the western region of those large power stations
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:Three-phase photovoltaic inverter grid, the use of phase-locked loop is what?
In addition to the function of converting DC current into alternating current, the inverter also has the maximum output tracking function (MPPT), overvoltage protection, short circuit protection, island protection, overheat protection, overload protection and DC grounding
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: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:Photovoltaic grid-connected inverter without DC emc how will happen
by means of energy converters can be converted into electrical energy. The process of converting light energy directly into electrical energy is precisely the response to photovoltaic effects. Without the need for any other mechanical parts, the energy in
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 grid inverter is a current source, the output voltage is basically the grid voltage, may be slightly raised.
Q:The function of photovoltaic grid - connected inverter
After some additional voltage buffering, the left side of the bridge is usually 18 ~ 20khz switching frequency, the dc voltage is converted to ac voltage.
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).
Q:Generally a large grid-connected photovoltaic power plant will have several inverters
, This method is simple to design, easy maintenance, but also for the power grid harmonics smaller, good power quality!

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