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Go Back   SailNet Community > On Board > Gear & Maintenance > Battery Selector Switch - proper use
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Thread: Battery Selector Switch - proper use Reply to Thread
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Topic Review (Newest First)
06-08-2007 09:27 PM
sailingdog Idiens-

They make automatic combining relays, like the BlueSea ACR..
06-08-2007 11:22 AM
Idiens Anyone had experience with Voltage Sensitive Relays as a way to automate charging of two banks?
06-08-2007 08:56 AM
sailingdog So, are we agreeing to be agreeable even when we disagree?
06-07-2007 11:57 PM
camaraderie I more or less agree maybe, I think.
06-07-2007 12:53 PM
sailhog
Quote:
Originally Posted by RickBowman
Cam,
I agree with you but I disagree that you thought that I disagreed with you when I was agreeing with what you posted but not for exactly the same reasons, and is the reason why I posted that I was in agreement basically with what you posted from a previous posting.

I agree with this, but found the tone disagreeable. Hope you agree. If you don't agree, lets just agree to disagree.
06-07-2007 11:03 AM
jrd22 Brad-

-Do you start your engine with both batteries?
Not normally, if batteries are low you may need to. Usually have a designated start battery(#2 in my boat)

-Do you run the engine with both batteries selected so it will charge (or will both batteries charge even if only one is selected)?
Both batteries will charge in the both position, but I prefer to switch from 1 to 2 at scheduled time intervals while running the engine.

-While sailing, or not using shore power, do you use just one battery?
Yes, I use the house battery(8D) and leave the start batt. for starting only.

We have a switch like yours and routinely switch from #1 to #2 while the engine is running with no problem so far(15yrs this boat, Yanmar). Normally you will have one starting battery that is a heavy duty diesel starting battery and then a second deep cycle "house" battery that you use for everything else. Hope this helps. John


06-07-2007 10:37 AM
camaraderie Rick...sounds like you think I disagree with you. That may be because I was quoting others responses to my original comment as I replied to them. Here is my original statement which I think is entirely consistent with what you said:

..switching your perko switch with the engine and alternator running will result in burned out diodes and a major alternator repair. Don't try it.

I too may have been blone in a former life! (G)
06-07-2007 12:31 AM
capbillh my switch is "2" "both" "1" "off" from left to right & it is a make before break once it is left of "off". The alternator and starter is only connected when the switch is other than "off".
Unless the switch is in the "both" position when starting, the GPS will go off because of the drop in voltage when starting the diesel. I do have a .5 v drop to the instrument from the instrument panel connection altho i am using 16 guage wire to the Garmin pigtail harness. I am thinking about soldering an other wire in parallel to all the panel connections.
I already mentioned in an other thread the finding that an other guy found by measurements that the battery switch in "both" does not cause a higher charged battery be drawen down by a lower charged battery unless there is a cell failure.
04-15-2007 12:28 PM
camaraderie Blue...that's the way they should be built. Unforunately the most common switches today leave you open to the very real danger of a clockwise turn!
04-15-2007 07:02 AM
Blue Eagle
Quote:
Originally Posted by camaraderie
An added “bonus” of these switches is that when the engine is running and the switch is changed from position 1 to 2, through the off position, the alternator is disconnected from the battery, thereby burning out the diodes in the alternator.[/FONT]
It seems that the builders of the boats and accessories you guys equip yourselves with have great faith in the sailor's native ability to get things right first time.

The designers of the "vintage" ones I have experience with have no such faith: You CAN'T turn my battery switch through "off" to get from 1 to 2. first, it only moves through an arc of about 120 degrees. Second, the order goes "off", "1", "both", "2".

Cockups not an option! Progress eh?!

Blue Eagle
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