The TM250 Inverter Systems include HTM250 series and STM250 series.


The HTM250 modular inverter system is made up of the TM250 inverter/s and the TJ10-G/TJ30-G monitor and STS module. The HTM250 is available in various configurations for both single and three phase output.
The inverter module is a compact, light-weight inverter with high switch frequency and modern semiconductor technology. It can be set up to run in parallel supporting small or medium systems.
The monitor & static transfer switch module allows for real-time system monitoring and keeps a history of up to 100 records.


TM250 Inverter System Technical Description

  • Monitor Module
  • Built-in STS with transfer time < 4ms
  • LCD display
  • Working mode selectable (AC or DC priority)
  • RS485 or RS232 communication port
  • Dry contact relay (x6)
  • Auxiliary contact (x16)
  • Built-in SNMP card – optional
  • Real-time clock
  • Inverter Module
  • N+1 redundant configuration
  • Active current sharing technology
  • Pure Sine wave output < 3% THD
  • Hot plug design
  • DC-AC isolation for greater system security
  • AC voltage selectable 110VAC or 230VAC
  • Efficiency up to 87%


The STM250 system comprises of an integrated power system with inverter, monitor and static transfer switch functionality. This modular inverter is a redundant inverter which can be composed into an N+1 redundancy system. In the case of a master fault, the digital control rapidly and automatically switches to a new master, leaving the load uninterrupted.
The hot swappable design makes maintenance and expansion of the system simple. The inverter has sinusoidal output as well as stable output voltage in static and dynamic conditions.



  • Pure Sine wave output < 3% THD
  • Hot plug design
  • N+1 redundant configuration with active current sharing technology
  • DC/AC isolation improving system security
  • Up to 90% efficiency
  • Complete protection
  • Integrated monitor and static transfer switch
  • Working mode selectable (AC or DC priority)
  • RS232 or RS485 communication port
  • DC-AC isolation improving system security
  • Selectable voltage 110VAC or 230VAC
  • Built-in SNMP card – optional

For more information and product specifications, please refer to the relevant document link, or contact us on 02 9602 8331 or follow us on Facebook to stay up to date and receive regular updates.

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