Canadian Solar 50 kW 3-Phase String Inverter

The Canadian Solar 50 kW three-phase string inverter is a high-performance, grid-tied, transformer-less inverter designed for commercial and industrial (C&I) scale solar installations. It’s engineered to maximize energy yield, deliver high conversion efficiency, and support flexible and robust solar string architectures. 

This inverter is ideal for rooftop systems or small/medium ground-mount solar plants where reliability, durability, and cost-effectiveness are critical. The design focuses on modular string-inverter architecture rather than a heavy central inverter, delivering easier installation, simplified servicing, and scalable system

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The illustration demonstrates the basic setup of the Deye 5kW Hybrid Inverter.
It also shows additional components required for a fully functional system, including:

– Generator or grid power
– PV (solar) modules

Please consult your system integrator for alternative system designs based on your specific requirements.

This inverter is capable of powering a wide range of household or office appliances, including motor-driven devices such as refrigerators and air conditioners.

Battery connection

For safe operation and regulatory compliance, a dedicated DC over-current protector or disconnect device must be installed between the battery and the Deye 5kW Hybrid Inverter. In certain applications, a disconnect or switching device may not be necessary, but over-current protection is still required.

Follow the steps below when connecting the battery:

  1. Select a suitable battery cable with the correct connector that properly fits the battery terminals.

  2. Use an appropriate screwdriver to loosen the terminal bolts, insert the battery connectors, and then tighten the bolts securely. Ensure they are fastened to a torque of 5.2 N·m in a clockwise direction.

  3. Verify that the polarity is correctly matched on both the battery and the inverter.

  4. Ensure the inverter connector is fully tightened to its waterproof position by turning it clockwise.

Ac Connection - Grid and Backup

Install a dedicated AC breaker between the inverter and the grid, and another between the inverter and the backup load. This ensures safe isolation during maintenance and protects against over-current.
For 3.6/5kW models, use a 32A–40A breaker for the backup load and a 40A breaker for the grid.

Before wiring the Grid, Load, and Gen ports, turn off all AC breakers. Strip 10 mm of insulation, loosen the terminal bolts, insert wires according to the polarity labels, and tighten securely. Ensure N and PE wires are connected to the correct terminals.

Do not mix up the “Grid,” “Load,” and “GEN” terminals.

Air conditioners need a 2–3 minute restart delay to protect internal components. If power returns too quickly and the unit has no built-in delay, the inverter may trip into overload or the air conditioner may be damaged.

PV - Panel Connections

Install a PV Combiner / Protection box between the Deye 5kw inverter and PV modules. It is very important for system safety and efficient operation

Use appropriate cable for PV module connections – Use 4mm – 6mm solar cable.

When selecting PV modules, please be sure to consider below parameters:

  1. Open circuit Voltage (Voc) of PV modules not exceeds max. PV array open circuit voltage of inverter.
  2. Open circuit Voltage (Voc) of PV modules should be higher than min. start voltage.

5KW PV Input voltage ranges ranges

  • PV Input Voltage : 100V – 500V
  • PV Array MPPT Voltage Range : 125V – 425V
  • There are 2 MPPT trackers 1 string can be connected per MPPT.

Sensors

CT Clamp

The CT Clamp needs to be installed at the correct location

 

Temperature Sensor

Temperature sensor used with Lead Acid batteries

 

Canadian Solar 50 kW 3-Phase String Inverter

  1. LED indicator panel
  2. Side handles and mounting ears
  3. M12 holes for lifting eyes
  4. Rating label
  5. Warning label
  6. Additional grounding point
  7. PV input connectors
  8. DC disconnect switch
  9. AC terminal block and protection cover
  10. Connector for wireless communication
  11. Connectors for RS485 and export limited
  12. Breather valve

Description

DC_Inversed_Failure

Solution

  1. Check the PV input polarity
  2. Seek help from us, if can not go back to normal state.

Description

DC_Inversed_Failure

Solution

  1. Check the PV input polarity
  2. Seek help from us, if can not go back to normal state.

Description

GFDI Relay Failure

Solution

  1. When inverter is in Split phase(120/240Vac) or three-phase system (120/208Vac) system, the backup load port N line needs to connect ground.
  2. If the fault still exists, please contact us for help.

Description

DC_START_Failure

Solution

  1. The BUS voltage can t be built from PV or battery.
  2. Restart the inverter, If the fault still exists, please
    contact us for help

Description

AC over current fault of hardware

Solution

AC side over current fault
    1. Please check whether the backup load power and common load power are within the range.
    2. Restart and check whether it is in normal.
    3. Seek help from us, if can not go back to normal state.

Description

DC over current fault of hardware

Solution

DC side over current fault
  1. Check PV module connect and battery connect.
  2. When in the off-grid mode, the inverter startup with big power load, it may report F20. Please reduce the load power connected.
  3. Turn off the DC switch and AC switch and then wait one minute,then turn on the DC/AC switch again.
  4. Seek help from us, if can not go back to normal state.

Description

Tz_EmergStop_Faul

Solution

  1. Please contact your installer for help.

Description

AC leakage current is transient over current

Solution

Leakage current fault

  1. Check PV side cable ground connection.
  2. Restart the system 2~3 times.
  3. If the fault still exists, please contact us for help.

Description

DC insulation impedance failure

Solution

  1. Check the connection of PV panels and inverter is firmly and correctly.
  2. Check whether the PE cable of inverter is connected to ground.
  3. Seek help from us, if can not go back to normal state

Description

The DC busbar is unbalanced

Solution

  1. Please wait for a while and check whether it is normal.
  2. When the hybrid in split phase mode, and the load of L1 and load of L2 is big different, it will report the F26.
  3. Restart the system 2~3 times.
  4. Seek help from us, if can not go back to normal state.

Description

Parallel CANBus fault

Solution

  1. When in parallel mode, check the parallel communication cable connection and hybrid inverter communication address setting.
  2. During the parallel system startup period, inverters will report F29. when all inverters are in ON status, it will disappear automatically.
  3. If the fault still exists, please contact us for help.

Description

AC Overcurrent fault

Solution

  1. Check the backup load connected, make sure it is in allowed power range.
  2. If the fault still exists, please contact us for help.

Description

No AC grid

Solution

No Utility

    1. Please confirm grid is lost or not.
    2. Check the grid connection is good or not.
    3. Check the switch between inverter and grid is on or not.
    4. Seek help from us, if can not go back to normal state

Description

Parallel system stop

Solution

  1. Check the hybrid inverter working status. If there’s 1 pcs hybrid inverter is in OFF status, the other hybrid inverters may report F41 fault in parallel system.
  2. If the fault still exists, please contact us for help.

Description

AC line low voltage

Solution

Grid voltage fault

    1. Check the AC voltage is in the range of standard voltage in specification.
    2. Check whether grid AC cables are firmly and correctly connected.
    3. Seek help from us, if can not go back to normal state.

Description

AC over frequency

Solution

Grid frequency out of range
  1. Check the frequency is in the range of specification or not.
  2. Check whether AC cables are firmly and correctly connected.
  3. Seek help from us, if can not go back to normal state.

Description

AC lower frequency

Solution

Grid frequency out of range
  1. Check the frequency is in the range of specification or not.
  2. Check whether AC cables are firmly and correctly connected.
  3. Seek help from us, if can not go back to normal state.

Description

DC busbar voltage is too low

Solution

  1. Battery voltage low check whether battery voltage is too low.
  2. If the battery voltage is too low, use PV or grid to charge the battery.
  3. Seek help from us, if can not go back to normal state.

Description

DC busbar voltage is too low

Solution

  1. it tells the communication between hybrid inverter and battery BMS disconnected when”BMS_Err-Stop” is active.
  2. if don’t want to see this happen, you can disable “BMS_Err-Stop” item on the LCD.
  3. If the fault still exists, please contact us for help.

Description

ARC fault

Solution

  1. ARC fault detection is only for US market.
  2. Check PV module cable connection and clear the fault.
  3. Seek help from us, if can not go back to normal state.

Description

Heat sink high temperature failure
 

Solution

Heat sink temperature is too high
  1. Check whether the work environment temperature is too high.
  2. Turn off the inverter for 10mins and restart.
  3. Seek help from us, if can not go back to normal state.

CSI Cloud Apps

Portal Apps for end-user

 

CSI Cloud

· Portal for end-user

· Display & monitor system performance and key metrics Visit CSI Cloud

CSI Cloud Pro

· Portal for installers, operators, fleet management

· Includes administrative & access rights management Visit CSI Cloud Pro

Mobile App

iOS and Android platform

· CSI Cloud and CSI CloudPro

· All app features available on mobile

Frequently Asked Questions

Yes. The Canadian Solar 50kW inverter is designed with a modular string inverter architecture, making it suitable for scalable commercial and industrial solar installations where multiple inverters can operate together.

The Canadian Solar 50kW 3-Phase String Inverter has a maximum DC input voltage of 1100V DC.

Yes. The inverter supports 16A input current, allowing compatibility with multiple modern high-power solar modules.

Yes. The Canadian Solar 50kW inverter includes smart string monitoring, helping installers and system operators monitor string performance and identify issues more efficiently.

The inverter uses intelligent air cooling to maintain stable operating temperatures and reliable performance in commercial and industrial applications.