Morningstar Relay Driver™ Logic Module Accessory, RD-1

  • Cost effective
  • High reliability
  • Flexibility
  • Fully programmable
  • Advanced generator control
  • Industrial design
  • LED indicators
SKU SE-M-BOS-4 Categories ,


Morningstar’s Relay Driver is a logic module which provides high level system control functions such as high/low voltage alarms, load control and generator start. The product controls fourindependent relay driver outputs by reading digital data inputs from Morningstar’s TriStar controller or by reading battery voltage when used in systems with other controllers.


  • High and Low Alarm Contacts for Industrial Applications
  • Load Control Including High Power Applications (pumps and large motors)
  • Temperature Controlled Settings for Battery Fans or Cooling Vents
  • Generator Start Functions
  • Auxiliary AC Backup Charge Control


  • Connected to a TriStar Controller: Battery voltage, charge/load current, battery temperature, TriStar heatsink temperature, PWM duty cycle, PV/load
  • voltage, and all TriStar alarms or faults.
  • Used in Systems with Other Controllers: Battery voltage, Relay Driver temperature, input voltages from other sources.

Additional information

Weight 1.31 lbs
Dimensions 3 × 7.5 × 7 in



Morningstar Corporation is a leading manufacturer of advanced solar charge controllers and inverters, designed to optimize and manage solar energy systems for homes, businesses, and industries. With over 25 years of experience, the company has built a reputation for reliability and innovation, providing customers with high-quality solar products that are built to last. Morningstar Corporation's product line includes a range of charge controllers and inverters that are designed to work seamlessly with solar panels, batteries, and other components, providing customers with a reliable and efficient source of solar power. With a commitment to sustainability and energy efficiency, Morningstar Corporation's solar products are a top choice for anyone seeking to reduce their environmental impact while maximizing their solar energy production.