On-Board Charger Inlet A revolutionary design in flanged inlets. The sleek design fits almost anywhere on a boat's exterior, and fishing line won't catch on the low-profile, UV resistant cap. With the On-Board Charger inlet hard-wired to an onboard battery charger, charging can take place with all the boat's hatches closed and locked, adding convenience and security for the boater. 15A, 125V straight blade inlet. UL listed.