MYPV AC-THOR Photovoltaic Power Controller
Product Specifications
- Model: AC ELWA 2
- Communication Protocol: Modbus RTU (RS485)
- Manufacturer: my-PV GmbH
- Compatibility: Compatible with Growatt inverters
Product Usage Instructions
Basic Settings on the my-PV Device:
Ensure the basic settings on the my-PV device are configured correctly before proceeding with the integration.
Communication with Growatt (Modbus RTU):
Follow these steps to establish communication with Growatt inverters:
- Use a three-pole Modbus RTU cable to connect the my-PV device directly to the Growatt inverter.
- Refer to Growatt’s instructions for wiring the connection on the Growatt inverter.
- For specific models like MID15KTL3-XH, connect PIN 3 & 4 on the my-PV device.
Settings on my-PV Device:
Configure the settings on the my-PV device as follows:
- Select the Growatt (Modbus RTU) control unit on the display.
- Alternatively, access the settings through the web interface if the device is integrated into the local network.
- If there is a battery storage unit, set the control target to -150 W for priority charging, otherwise, leave it at -50 W.
Frequently Asked Questions
- Q: Can I connect the AC ELWA-E to my PV device for communication?
- A: No, the AC ELWA-E does not support Modbus RTU (RS485) communication, making it incompatible for direct connection.
- Q: How can I update non-SPH-UP Growatt inverters for RS485 communication?
- A: Contact Growatt Support at service.de@growatt.com with your serial number and a brief explanation to update non-SPH-UP inverters.
Product Information
If the RS485 communication connection on the inverter is still being used by other devices, communication with my-PV is not reliably possible! A connection with the AC ELWA-E is not possible as it does not have Modbus RTU (RS485) communication!
Basic settings on the my-PV device
- Before commissioning, it is essential that you read the assembly instructions that accompany the device, as well as the operating instructions available online.
- Find the AC•THOR operation manual here.
- Find the AC ELWA 2 operation manual here.
Communication with Growatt (Modbus RTU)
- The combination with Growatt was tested by my-PV with SPH 10000TL3 BH. The three-pole Modbus RTU cable connects the my-PV device directly to the Growatt inverter.
- Use a shielded twisted pair cable and connect the shield to earth (GND) at one end!
- RTU bus must be fitted with a 120 Ohm terminating resistor!
- When controlled via Modbus RTU, the M7 operating mode cannot be used with the AC•THOR!
Three pins on the 8-pin connector of the AC•THOR are the Modbus RTU Gateway. The 120 Ohm terminating resistor is not included with the AC•THOR!
On the AC ELWA 2, the connection is identified by RS485, A, B and GND.
The wiring on the Growatt inverters must be carried out using the Growatt instructions.
- If you have any questions about the RS485 connection to your inverter, please contact Growatt Support: service.de@growatt.com
- According to Growatt, inverters that are not SPH-UP may need to be updated to the latest firmware version for communication via RS485. To do this, send the Growatt serial number and a brief explanation to service.de@growatt.com.
- When controlled by an inverter, a meter at the feed-in point is required in the system. Otherwise, the inverter query does not provide any data.
Settings on my-PV device
Select the “Growatt (Modbus RTU)” control unit on the display.
Alternatively, these settings can also be made on the web interface. To do this, the my-PV device must also be integrated into the local network.
If there is a battery storage unit in the system and this is to be charged as a priority, then the “control target” should be set to -150 W. Otherwise, we recommend leaving it at -50 W.
- my-PV GmbH
- Betriebsstrasse 12, 4523 Neuzeug
- www.my-pv.com
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Documents / Resources
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MYPV AC-THOR Photovoltaic Power Controller [pdf] Instruction Manual AC-THOR Photovoltaic Power Controller, AC-THOR, Photovoltaic Power Controller, Power Controller, Controller |
