Morningstar’s advanced SunLight solar lighting controller combines the SunSaver design with a microcontroller for automatic lighting control functions. Four versions are available: 12 Volt 10 amp ratings, 12 Volt 20 amp ratings, 24 Volt 10 amp ratings, and 24 Volt 20 amp ratings.
Unique Lighting Control using solar array voltage to determine day and night, the SunLight provides 10 different lighting control options.By measuring the length of the night, the SunLight’s ON/OFF/ON options provide the capability to turn on the light at sunset, turn off the light after 3 to 6 hours, and then turn on the light again for 1 or 2 hours before sunrise.The length of the night is calculated by taking a moving 4 night average, and thus automatically adjusts for seasonal changes in the length of the night. The test button helps the installer by blinking the red LED to confirm correct selection of lighting control option, and also turns on the light for 5 minutes to verify that the light is operating correctly. Timer accuracy is within 2 seconds. The SunLight is available in 10A or 20A, and at 12VDC or 24VDC. For solar arrays greater than 20A, the SunLight may be used in parallel with the SunSaver controller (lighting control limited to 20A).
The Morningstar String Calculator will help you decide how many PV modules you may use in series and parallel with a Morningstar charge controller.