Photovoltaic Inverter 50KW Off Grid Three Phase

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50000 watt
Supply Capability:
3000000 watt/month

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1. Structure of Photovoltaic Inverter 50KW Off Grid Three Phase

A solar inverter, or PV inverter, or Solar converter, converts the variable direct current (DC) output of a photovoltaic (PV) solar panel into a

 utility frequency alternating current (AC) that can be fed into a commercial electrical grid or used by a local, off-grid electrical network. It is

a critical 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.


2. Main Features of Photovoltaic Inverter 50KW Off Grid Three Phase

• using IGBT from Mitsubishi company as the power components
•using American ATEMEL company microprocessor as figure controller
• perfect protection and warning functions
• circuit frame compact,Max. Efficiency≥94%
• with wide input voltage range
• RS232/485 communication,multi communication interface can be selected
•big-screen English LCD, perfect display, interface-friendly


3. Photovoltaic Inverter 50KW Off Grid Three Phase Images



4. Photovoltaic Inverter 50KW Off Grid Three Phase Specification


50KVA off grid three phase inverter technical parameters





DC input

Input rated voltage

220 VDC

380 VDC

Input rated current

227 A

132 A

Input DC voltage range

180-300 VDC



Allow input voltage   range

220 VAC / 380 VAC   / 400 VAC ± 15% VAC

AC input

Input rated current

139A / 76A / 72.5A


Bypass transfer time

4 ms

AC output

Rated capacity


Output rated power


Output rated voltage   and frequency

220 VAC / 380 VAC   / 400 VAC,50Hz / 60Hz

Output rated current

139A / 76A / 72.5A

Output voltage accuracy

220 VAC / 380 VAC   / 400 VAC ± 2%

Output frequency   accuracy

50Hz / 60Hz ±0.05%

Waveform distortion   (THD).   (Linear load)


Dynamic response time   (Load 0←→100%)


Power factor (PF)


Overload capacity

120%,3 minutes,150%,10 second

Crest factor (CF)


Inverter efficiency


Working Environment

Dielectric strength


Noise (1m)


Ambient temperature



0~90%,No condensation


≤5000 m

Production function

Input reverse   protection, input under-voltage protection, output overload protection,   output short circuit protection, thermal protection



5. FAQ of Photovoltaic Inverter 50KW Off Grid Three Phase

Q1:Can we visit your factory?

A1:Sure,welcome at any time,seeing is believing.

Q2:Which payment terms can you accept?

A2:T/T,L/C,Moneygram,Paypal are available for us.



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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:Is the grid side of the grid and the inverter?
Off-grid system power transmission sequence: photovoltaic panels> relays> inverters> relays> electricity load;
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 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.
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: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:Installation and maintenance of photovoltaic grid - connected inverter
Before making an electrical connection, be sure to use the opaque material to cover or disconnect the PV panel. Exposure to sunlight, photovoltaic arrays will produce dangerous voltages. All installation operations must be done only by qualified technicians.
Q:Photovoltaic grid-connected inverter without DC emc how will happen
Solar photovoltaic power generation technology is the use of solar cells, the photovoltaic effect of semiconductor materials, solar radiation can be directly converted into a new type of power generation system, solar energy is a radiant energy, solar power means --- to direct conversion of sunlight Into electricity,
Q:After the PV inverter, how to achieve the same period before the network?
When the voltage, frequency, phase does not meet the requirements, the automatic closing closing pulse.
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.

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