Inverter: Sofar - dalathegreat/Battery-Emulator GitHub Wiki

[!CAUTION] Working with high voltage is dangerous. Always follow local laws and regulations regarding high voltage work. If you are unsure about the rules in your country, consult a licensed electrician for more information.

Compatible Sofar inverters

  • HYD 5KTL
  • HYD 6KTL
  • HYD 8KTL
  • HYD 10KTL
  • HYD 15KTL
  • HYD 20KTL

The inverters started out development with using "Pylontech battery over CAN bus", but you can also use the new SOFAR_CAN if you have multiple batteries. At the moment it is recommended to use Sofar CAN!

Communication wiring

The Sofar inverter works via CAN. The LilyGo board can have both a CAN battery and a CAN inverter connected on the same pins. When the board is used with two CAN devices at the same time that have termination resistors in all ends, the terminating resistor needs to be removed from the board. Please measure CAN termination if you have issues. This is explained in CAN-troubleshooting

ℹī¸ Always check the termination resistance of the system! That way you know if resistor needs to be removed or not.

ℹī¸ Grounding is extremely important. Make sure the battery case is connected to protective earth, and the shield part of the twisted pair CAN is connected to PE also! Failing to do this will result in CAN errors.

Which protocol to use

For this inverter type, use the option called "Sofar BMS (Extended) via CAN" under the "Inverter Protocol" setting

[!IMPORTANT]
If you try to use Pylon: The Pylon protocol is very versatile. By default we emulate a 4x96V Force H2 battery. Not all inverters like this setup, so please adjust the configuration if needed. Pylon options are located in the file /Battery-Emulator/Software/src/inverter/PYLON-CAN.cpp

Note also that Sofar inverters need to have some special flags set in the PYLON-CAN.cpp file. Uncomment both #define SEND_1 and #define INVERT_LOW_HIGH_BYTES and #define SET_30K_OFFSET

image

Due to this, it is better to use Sofar CAN instead!

Inverter Wiring

Connect HV cables to battery terminals using OEM connectors. Highly advised to add ~32A DC fuse between. bild

Connect CAN H and CAN L from Lilygo to socket no.8. CAN-H - PIN 7 CAN-L - PIN 8

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Inverter Configuration

In "Advanced Settings/Battery Parameters" choose Pylontech as battery type and set 01 as battery address (00 is default), save your settings. Check all fuses and everything else twice, then turn on Lilygo, and voila!

Sofar CAN

This inverter can also use the dedicated "Sofar BMS (Extended) via CAN" protocol. The bonus of this protocol, is that it supports multiple batteries, using separate IDs for each battery.

In "Advanced Settings/Battery Parameters" choose Sofar as battery type and set address accordingly to address set in Battery Emulator. To run two separate batteries on two different DC terminals first you have to enable BAT 1 and BAT 2 in Input channel setting. Then, when setting parameters for each batteries use two different address for BAT 1 and BAT 2.

On the battery emulator side, have one battery configured as 0, and the next 1, etc.

See the attached .zip file for more info on this protocol SofarDocuments.zip