This is a manual for a solar battery charge controller. It includes the product specifications, safety instructions and operation functions.
The Morningstar SunGuard 1098 is a 12V PWM solar battery charge controller designed for lead-acid battery systems. It features solid-state MOSFET switching, temperature compensation, and reverse current protection to prevent battery discharge at night. The device is rated for a maximum solar input of 4.5A and operates within an ambient temperature range of -40 to +60°C.
| System Volts | 12 V |
|---|---|
| PWM Setpoint | 14.1 V |
| Max. Solar Volts | 30 V |
| Rated Solar Input | 4.5 A |
| Min. Operating Volts | 6V |
| Max. Input (5 min.) | 5.5 A |
| Self-consumption | 6m A |
| Max. Solar Short Circuit Rating | 5.5 A |
| PWM Temp Compensation | -28 mV/˚C |
| Reverse Current Leakage | <10 uA |
| Ambient Temperature Range | -40 to +60 ˚C |
No, the SunGuard prevents the battery from discharging through the solar array at night, so a blocking diode is not required.
The maximum solar voltage rating is 30 V.
The controller should be inspected at least once per year to ensure best performance.