Photovoltaic Grid-Connected Inverter SG750MX

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1. Structure of Photovoltaic Grid-Connected Inverter SG750MX 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, North America and Europe.

 

 

2. Main Features of the Photovoltaic Grid-Connected Inverter SG750MX

• Transformerless inverter, max. efficiency of 98.7%, CEC efficiency of 98.5% for SG800MX,max. efficiency of 98.6%, CEC efficiency of 98.0% for SG750MX

• Employing a patented thermal management system, the inverter is able to operate from -13˚F to 140˚F (-25˚C to 60˚C), and up to 19,600’ (6,000 m).

 

• High power density, small equipment footprint

• DC disconnect, AC circuit breaker, separate DC & AC cabinets

• Max. DC input voltage is 1000V, can be mounted on a skid or an e-house, giving maximum design flexibility and lowering installation costs

 

• Continuous active power control

• Advanced grid support functionality, meet grid requirements around the world

• Full remote and local power curtailment, PF, HVRT, LVRT, FRT controls via ModBus & Ethernet

 

• Designed for 20+ years of operating life

• NEMA4X electronics cabinet

 

 

3. Photovoltaic Grid-Connected Inverter SG750MX Images

 

 

 

 

 

4. Photovoltaic Grid-Connected Inverter SG750MX Specification

Input Side Data

 

Max. PV input power

850kW

Max. PV input voltage

1000V

Start voltage

520V

Min. operation voltage

500V

Max. PV input current

1600A

MPP voltage range

500~820V

No. of DC inputs

1, 6-12

PV array configuration

Negative ground (standard), Floating or Positive Ground (optional)

Output Side Data

 

Nominal AC output power

750kW

Max. AC output apparent power

825kVA

Max. AC output current

1512A

THD

 <3% (nominal power)

Nominal AC voltage

315V

AC voltage range

277~347Vac

Nominal grid frequency

50/60Hz

Grid frequency range

47~52Hz/57~63Hz

Power factor

>0.99@default value at nominal power, adj. 0.8 overexcited~0.8 underexcited

Isolated transformer

No

DC current injection

<0.5 % In

Efficiency

 

Max. efficiency

98.60%

European efficiency

98.30%

CEC efficiency

98.00%

Protection

 

Input side disconnection device

DC load switch

Output side disconnection device

Breaker

DC overvoltage protection

Yes

AC overvoltage protection

Yes

Grid monitoring

Yes

Ground fault monitoring

Optional

Over temperature protection

Yes

Insulation monitoring

Optional

General Data

 

DimensionsW×H×D

2598x2164x1000mm

Weight

2340kg

Operating ambient temperature range

-25~+60(55 derating)

Noise emission

<70dB

Night power consumption

<100W

External auxiliary supply voltage

480/600V(3/N/PE)

Cooling method

Temperature controlled air-cooling

Ingress protection rating

NEMA 3RIP54

Allowable relative humidity range

0~95% no condensing

Max. operating altitude

6000m (3000m derating)

Fresh air consumption

4425 m³/h

Display

LCD

Communication

RS485/Modbus, Ethernet(Opt.)

 

 

5. FAQ of Photovoltaic Grid-Connected Inverter SG750MX

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
Self-use, do you mean off-grid system? Or else? Europe and Sweden side of the grid project electricity situation is also self-use? If not for their own use or spontaneous use is not used up, sent to other places electricity, you need a transformer?
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.
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:How the output voltage of the PV inverter and the grid-connected voltage are determined
Inverter is the DC power (battery, battery) into alternating current (usually 220V, 50Hz sine wave). It consists of inverter bridge, control logic and filter circuit. Widely used in air conditioning, home theater, electric wheel, power tools, sewing machines, DVD, VCD, computer, TV, washing machine, range hood, refrigerator, video recorders, massage, fan, lighting and so on. In foreign countries
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:What is the difference between a PV inverter and a solar inverter?
Instability, the wind speed and the equipment itself will directly affect the generator rotation, so the voltage and current fluctuations, frequency instability, in short, is the power quality is poor) Therefore, through the inverter after the first rectification inverter to improve the quality of power
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:Is the PV inverter a current source or a voltage source?
According to the waveform modulation method can be divided into square wave inverter, stepped wave inverter, sine wave inverter and modular three-phase inverter.
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?
Off-grid system power transmission sequence: photovoltaic panels> relays> inverters> relays> electricity load;

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