this is to return the energy into the battery which has just been depleted a little during the start up process

Gasketed sealing ring provides watertight seal

Marine-grade stainless steel frame for durability and longevity

multiple AC loads

Hella - LED NAV Lights Port/Starboard – Stern, White Stern Light, Part No. 980520501 Jabsco this is to return theEach NaviLED lamps is a completely sealed unit. High impact black housing ensure durability from waves and impact. Has UV resistant and impact resistant acrylic lens. Port and Starboard lights draw less than 2 Watts combined. Multivolt 8 28 Volts DC. 2 3 4"W x 2 1 16"H x 1 3 4"D.