Morningstar SunSaver DUO SSD-25RM Solar Panel RSolar Charge Controller & Remote Display
Rated Solar Current: 25 Amp
System Voltage: 12 Volts
Morningstar SunSaver Duo is an advanced PWM two battery controller. Designed for 25 amps at 12 volts DC, at the same time calculate this product of two separate batteries and isolated as a house and an engine battery, based on user selectable priorities.
This controller also includes a backlit remote meter which may be mounted in or on a wall, and displays digital image and status information about the solar power system.
I used this for about one year, worked good, kept both batteries topped off.
no corrosion and 100% functional...
Price is 129.50 plus shipping. thanks