Patent ID: 7898219

Claim:
An on-board battery supervisor means for monitoring the state-of-charge (SOC) of a battery in a boat having an outboard motor (or other engine type), the on-board battery supervisor means comprising: a voltage means for measuring the voltage of the battery through Kelvin connections; a dual timer means for determining when the output of the voltage means is valid; a current sensing means for measuring load current from the battery, excluding outboard motor current; a compensation means for battery internal resistance; an evaluation means for determining the state-of-charge (SOC) of the battery based on the relationship between the measured voltage, measured current, battery internal resistance compensation and the dual timer; a first switching moans for connecting and disconnecting loads connected to the battery; a latching, adjustable, circuit breaker means that is integral to the first switching means; a second switching means for manual control of first switching means and for resetting the latching, adjustable, circuit breaker means; a first status means for indicating when the state-of-charge (SOC) level of the battery is above a level that allows for reliably starting the outboard motor; and a second status means for indicating a fault.