Inverter: Growatt HV - 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 Growatt inverters

The current implementation emulates a "HVC 60050-A1 BMS". This means the following inverters might work

Growatt SPH 10 10000TL3 BH-UP :warning: Works 80% of the time :)
Growatt SPA 4000-10000TL3 BH-UP :question:

Incompatible Growatt inverters

Growatt MIN TL-XH (This inverter does not have the DC-DC converter between internal DC-bus and battery connectors, also the RS485 protocol is not modbus and Growatt support does not release the internal protocol.)

Communication wiring

The Growatt HV 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

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

ℹ️ 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.

Compiling the software for Growatt inverters

Make sure that the settings in the "USER_SETTINGS.h" file are correct. The line:

#define GROWATT_HV_CAN //Enable this line to emulate a "Growatt High Voltage v1.10 battery" over CAN bus

Needs to be uncommented for the software to emulate the correct protocol.

Next step is then to select the battery that you intend to use, for instance if you use LEAF battery, make sure the following line is uncommented:

#define BATTERY_TYPE_LEAF // See NISSAN-LEAF-BATTERY.h for more LEAF battery settings