Patent ID: 8164306

Claim:
A charge control device for a marine vessel arranged to control charging of a plurality of batteries installed in the marine vessel, the plurality of batteries including a main battery arranged to supply power for operating an engine of a propulsion device, and an accessory battery arranged to supply power for devices other than the engine, the main battery and the accessory battery being connected in parallel to a power generator attached to the engine, the charge control device comprising: a switching element arranged to short-circuit the power generator; a first control unit arranged to execute a first control to short-circuit the power generator by driving the switching element when a voltage of the main battery exceeds a first upper limit, in a first control period; and a second control unit arranged to execute a second control to short-circuit the power generator by driving the switching element when a voltage of the accessory battery exceeds a second upper limit, in a second control period which is longer than the first control period.