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Utilities to talk to a Victron inverter

This includes a simple library for the mk2 protocol, and some scripts for talking to a Multiplus. Use at your own risk.

MK2 class

The MK2 class takes a single argument, a serial port object from pyserial. This is usually to /dev/ttyUSB0 with a baudrate of 2400. Upon construction, all scaling and offset values are queried from the inverter so that later operations need not query them again.

The other methods are discussed below.

  • dc_info

    Returns a dict/object with these items:

      * ubat: Battery voltage
  * ibat: Battery discharge current
  * icharge: Battery charge current

  • ac_info

    Returns a dict/object with:

      * umains: Mains voltage
  * uinv: Inverter output voltage
  * imains: Current on the AC input
  * iinv: Current on the inverter output

  • master_multi_led_info

    Returns a dict/object with:

      * min_limit: Minimum powerassist level in ampere
  * max_limit: Maximum powerassist level supported by device, in ampere
  * limit: Current power-assist level

  • led_info

    Returns a dict/object with True/False fields for leds:

          * mains
      * absorption
      * bulk
      * float
      * inverter
      * overload
      * low bat
      * temp

  • get_state

    Returns text string indicating current state of inverter.

  • set_state

    Takes an integer argument, set charger such that:

      * 1: forced equalise mode
  * 2: forced absorption mode
  * 3: forced float mode

  • set_assist

    Takes a single argument, which is a floating point value indicating the PowerAssist level in ampere. If you set this lower than min_limit as returned by master_multi_led_info, it will assume the minimum. If you set it higher than max_limit in master_multi_led_info, it willa ssume the maximum. If you set it to zero, the inverter goes into invert mode.