Morningstar RD-1 Relay Driver

$145.00 $120.00

SKU: RD-1 Category:

Volume discount pricing

Inventory sale valid in the continental US only.

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 relay controls four independent 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.

When 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.

When used in systems with other controllers:
Battery voltage, Relay Driver temperature, input voltages from other sources.

It is easy to program the Relay Driver with the included PC software via serial RS-232 port connection. The Relay Driver is pre-programmed with four commonly used settings and data is stored in a non-volatile memory.

The relay driver provides flexible parameters to control one, two or three-wire generator schemes and complete control of preheat, crank, ignition and cool-down.

Each relay driver output may be controlled directly by MODBUS commands via the RS-232 for use with PLC’s and other industrial hardware. Mounts on a DIN rail or a flat surface.

The LED indicators display power and status of each channel as well as faults and data sampling intervals.



Morningstar Corporation is a manufacturer of solar charge controllers. They started in 1993 and are based in Newtown, PA. Over three million Morningstar units have been sold through their network of dealers around the world. Morningstar's charge controllers have set new standards in performance, quality, reliability and innovative features, and global solar markets have consistently recognized Morningstar’s products as the industry’s best overall customer value. Their manufacturing is conducted in a fully automated ISO 9001 facility, they perform 100% functional testing on every product, using the latest computerized test equipment and processes.

Morningstar Relay Driver


Specification sheet for Morningstar RD-1 Relay Driver