Modbus Register Tables

Register AddressNameData TypeUnitDescription
36506Slave AddressU16Slave ID of the EPM. The Inverters will start at one but the register values are at different numbers.
36509Inverter QuantityU16Low byte is the number of PV inverters, high byte is the number of hybrids.
36508Backflow PowerS32WPower from the grid back to the inverters in Watts. Only applies when current control is OFF.
36507CT RatioU16Current transformer ratio. The secondary is always 1. Therefore if you have 1000:5A CTs, you will need to select 200
36511Fail SafeU160 = Fail Safe is OFF, 1 = Fail Safe is ON. G100/2 is here somewhere need to add later.
36510Per Phase LimitingU160 = Per Phase Limiting is OFF, 1 = Per Phase Limiting is ON. G100/2 is here somewhere need to add later.
36515PT RatioU16Voltage transformer ratio. The secondary is always 1. Therefore if you have 1000:1V PTs, you will need to select 1000
36517Current ControlU160 = Current Control is OFF, 1 = Current Control is ON.
36513Transmit On/OffU16Default OFF. When ON, the EPM will stop controlling and replying to modbus, it will let you control and update connected inverters.
36540On/OffU160 = ON, 1 = OFF. With this set to OFF, it will not control the inverters just monitor them.
36541Site PasswordU16This is the password for the site. It is used to access the site settings and update the firmware.
36543CT DirectionU160 = forward, 1 = reverse
36545Backflow CurrentU16ACurrent from the grid back to the inverters in Amps. Only applies when current control is ON.
36546CT Polarity CheckU160 = CT Polarity is correct, 1 = CT Polarity is incorrect
36547Max Control PercentU16%0-100. This is the maximum percentage of power that the EPM will control. If the inverter is producing more power than this, the EPM will not control it.
36548BufferU16W or dA, depending on current controlControl deadband. Useful for unstable loads which are highly dynamic. Larger buffer = more stable but could sit at lower generation.
36549Meter SelectU16Primary meter type selection. Fixed at address 01. Low byte is meter type, high byte is meter location
36539Meter2 SelectU16Secondary meter type selection. Fixed at address 02. Low byte is meter type, high byte is meter location
36550Clear EnergyU16Zeros all energy counters. Requires confirmation.
36551Control ProtocolU16Communication protocol selection. 7E protocol works on all grid-tied inverters. Modbus broadcast does not work on all inverters (often need firmware update). 7E protocol is known to cause issues with hybrid inverters and cause PRO inverters to freeze.
36552Generator Spinning ReserveU16kWSets the spinning reserve power level for generator control.