So what is the unregulated charger good for? I could get a charge controller or just use the system as an occasional battery charger. I could isolate 2 batteries with a solenoid that is only engaged to the house system when I want it to be while monitoring the charge. I don't plan on motoring much, it is a sailboat. I still feel I did well even if I don't ever if rarely use the charge feature, because I got the high thrust prop and that has made up or broke even in cost. What would you do with the charging system? I can not find out how much oil goes in this thing anywhere. The owners manual covers what type but not the amount. How much oil goes in the engine? How much and what kind of oil goes in the lower end? Its not even stamped or written on the engine anywhere.