Marks Marine Electric in Point Loma's Shelter Island marina basin services vessel electrical systems from 18-foot center consoles to 600-foot commercial ships at its Shelter Island Drive shop. The crew diagnoses and repairs engine starters, alternator charging circuits, bilge-pump wiring, and navigation-light runs—core marine-electrical tasks that complement the hull-side window and portlight work done by ShoreSight Marine Windows on the same dock. Generator installations cover Northern Lights and other marine gensets, including load-bank break-in runs, automatic transfer-switch wiring, and shore-power converter integration through Atlas Marine Systems frequency converters. Battery-bank upgrades use lithium-iron-phosphate cells from BattleBorn and Enduro, sized to each vessel's house-load calculation and wired with proper fusing, bus bars, and battery-management-system monitoring visible through onboard NMEA 2000 networks. Dockside service extends across San Diego County, with afternoon and weekend availability that keeps charter and commercial boats on schedule alongside the mechanical and structural work handled by yards like Sea Monster Marine. The most involved projects rewire entire electrical systems on long-dormant vessels—replacing corroded panel boards, installing new breaker circuits for every salon and stateroom load, and commissioning nav-light, radar, and GPS electronics before the boat moves under its own power.