solar and outboard charging of boat battery

Discussion in 'General Electronics Chat' started by boater, May 18, 2009.

  1. boater

    Thread Starter New Member

    May 16, 2009
    I have a 75+ Ah deep cycle sealed lead acid battery on the boat. It is maintained in charge by a 10w solar panel, and the charge from the panel is regulated by a "BP solar" SR8 regulator (8 amp). I would like to add the charge from a small (8hp) 4 stroke outboard (6 amps) which comes via a rectifier (not a recitifier/regulator). I dont know what the voltage is coming off the motor. Does the current coming from the outboard need to be regulated first, or do I simply wire the current from the outboard straight to the sealed battery? Or can the outboard current be regulated by the existing solar panel regulator? the outboard will be run for periods up to 8 hours max before long periods of inactivity. Any tips would be greatly appreciated.
  2. thingmaker3

    Retired Moderator

    May 16, 2005
    I would use a separate charge controller for the outboard. Use diodes to keep the outboard from trying to charge the PV array's "regulator" or vice-versa.