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Flexcharge Night Watchman Dusk To Dawn Controller

This unique product was started as the pet project of our chief engineer at Flexcharge. As a cruising sailor he found that he was often thinking more about getting underway in the morning than turning the mast head anchor light OFF. This of course used a substantial amount of battery power lighting the lamp all day. The Night Watchman is designed to be mounted outside in a marine salt air environment. It is completely waterproof, and very small (1″ x 1″ x 1″) for mounting in an inconspicuous location.

Because power consumption is always a concern on battery powered systems, (sail boats, PV systems, etc.) the Night Watchman is designed to use an extremely small amount of power in standby mode (only 0.00015A or 0.15mA), yet it is capable of supplying up to 10A of load current.

With boring repetition the Night Watchman will turn 12V incandescent, LED or fluorescent lights ON in the evening within a half hour of sunset, and OFF in the morning within a half hour of sun rise.

The Night Watchman’s circuitry is designed to prevent flickering therefore it can be used to control 12V fluorescent lamps and all other lamp types including LEDs.

Feel free to go ashore during the day and stay all night. Your mooring light will turn ON and OFF protecting you vessel as required. Many applications have developed since the original marine use. Signs, yard lights, cabins, etc. Works on any load within the 10 amp rating including motors. Larger loads can be controlled by using a relay controlled by the Night Watchman. When used in conjunction with our 12 volt Programmable Timer you can have dusk to dawn control along with an OFF time during the night.

Other great uses for the Night Watchman

Use for Boat, Cabin, and Spreader lights too

12V Motor Home / RV lights

Yard and Porch 12 volt lights

Solar lighting system’s lamp controller

Motor operation such as Chicken coop doors etc.

Automatically turn ON low level lighting when Night Watchman senses that High level lighting in the area is turned OFF


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10A 12V


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