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:What is the PV inverter starting voltage
Inverter is a kind of semiconductor device composed of power adjustment device, mainly used for DC power into AC power. Generally consists of boost circuit and inverter bridge circuit. The boost circuit boosts the DC voltage of the solar cell to the DC voltage required for the inverter output control. The inverter bridge circuit converts the boosted DC voltage to the AC voltage of the common frequency. The inverter is mainly composed of a switching element such as a transistor, and turns the DC input into an AC output by repeatedly turning ON-OFF the switching element in a regular manner. Of course, it is not practical to simply output the inverter output waveforms from the on and off circuits
Q:Three-phase photovoltaic inverter grid, the use of phase-locked loop is what?
Grid-connected inverter can be operated locally through the LCD screen, or through remote monitoring with dedicated monitoring software.
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:How the output voltage of the PV inverter and the grid-connected voltage are determined
supply through the cable to the battery. The use of household appliances connected to the power converter output can be used in the car a variety of electrical appliances. The available electrical appliances are: mobile phones, laptops, digital cameras, cameras, lights, electric razors, CD players, game consoles, handheld computers, power tools, car refrigerators and various tourism, camping, medical emergency appliances Wait.
Q:PV grid-connected inverter and independent inverter in the control of what is the difference
And you said that the independent inverter, said off-grid inverter it, this inverter can not access the mains, the components of the electricity through the off-grid inverter to the battery charge, the battery at night
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: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: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:What is the difference between a grid-connected inverter and an off-grid inverter? What are the advantages of a hybrid inverter?
Off-grid inverter is equivalent to their own to establish an independent small power grid, mainly to control their own voltage, is a voltage source.

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