posted 07-29-2002 03:14 PM ET (US)
Okay, first -- it's not my fault. My 87 Revenge came wired this way, and with replacing the thru-hulls and the many, many little things left from a couple of years of very minimal maintence my brain is frazzled, so I can't figure out if this set up is good, bad or just wacky. Any comments are appreciated.In the rear of the boat, two 150 Johnsons are connected to a port and starboard battery under the teak hatches. Each battery has a Perko on/off switch near it.
A third '1-2-both-Off' switch is exposed on the starboard rear cockpit.
So far, so good.
In the cuddy cabin under the port console, two ADDITIONAL batteries are installed -- on the cabin wall are two smaller chrome Perko 'on/off' switches. One isolates the windlass from everything -- you turn it on to get power to the windlass. The other seems to connect the 'house' circuits to the batteries.
The front set of two batteries seems to be connected to the rear set, and the possibilities are boggling my little mind.
The aft switches seem to totally isolate the individual batteries -- there's nothing else connected so if the port one is 'off' the port battery is completely isolated, etc.
My question is what is the best way to operat e this system. If I throw the front two cabin switches to 'off' then it seems I'm closest to Jim's 'new' system:
http://continuouswave.com/whaler/reference/dualBattery.html
This leads me to believe that under normal operation, I should never run BOTH with both engines running -- either 1 or 2. What happens to the charging current from the non selected engine? Isn't this the same as running the engine without the charging circuit connected to a load?
Now, if I want to charge the two FRONT batteries, throwing the NON Windlass switch to ON brings the 'house batteries' on line. If I leave the rear switch on '1' does that mean that the Starboard engine is charging the Starboard REAR battery AND the two forward house batteries?
The problem is I can't figure out exactly how the front two batteries are connected to the rest of the system -- there must be a way to use my multimeter to figure it out, but I sure haven't been able to.
I just want to make sure I don't burn a rectifier by running one of the engines unconnected to something.
The guy I bought the boat from isn't much help -- he ran everything on 'both' and on, all the time figuring that it meant everything was getting charged at once.
Help!