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Go Back   SailNet Community > On Board > Gear & Maintenance
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  #31  
Old 09-09-2008
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Originally Posted by denverd0n View Post

One thing that is obvious from all of these "how do I charge my batteries" threads is that there is a LOT of confusion out there! Is there a book that explains it all in a clear and concise manner for the layman? Perhaps Nigel Calder's book? (Which, I confess, is on my list but I haven't gotten around to reading yet.)
The problem with books is that they are only updated every so often and in between those times technology changes. Echo's, Duo's and Combiners, in the scheme of boats and books, are relatively "new to the scene".

I find the best and most current advice can be found on the net. It's a good idea to own Calder's books but when it comes to new or newer/newish technology Sailnet, Sailboatowners, Cruisers Forums, Plastic Classic Forums etc. etc. and the vast number of "brand" owner association forums are the places to go.

You can always read about new tech here or there then download manuals from the manufacturers web sites.
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  #32  
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Originally Posted by btrayfors View Post
Jim,

The TrueCharge 10TB charger can handle one battery bank just fine. Connect one red wire and one black wire to the desired battery bank (e.g., to the house bank).
Yes. Alternatively: I can leave the 10TB hooked up just the way it is, and hook the Echo-Charge up. Xantrex says they will not interfere with one another.

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The EchoCharge will work independently of the TrueCharge 10TB charger. Connect it to the start battery and the house battery bank per instructions which accompany the device.
Yes, of course.

Since the 10TB only has 10A max output, its behaviour using one channel run through the Echo-Charge would probably be the same as when using the two "channels," which aren't really very independent at all, it seems.

Jim
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No matter what Xantrex says, if you're gonna use an EchoCharge, I'd disconnect the second "channel" (i.e., the 2nd red wire from the charger).

It's not a question of how much amperage; it's a question of flow control (or "interaction" as you correctly surmised at the beginning).

The EchoCharge is built exactly for what you wanna do. The charger's 2nd channel likely isn't as "smart". Leaving it connected could fool the EchoCharge into thinking the battery is at a higher level of charge than it really is.

Without getting to a real design engineer familiar with that particular charger (and where do you find one at Xantrex these days?), I'd opt for the "clean" solution rather than trust to what someone told you over the phone.

Bill

Last edited by btrayfors; 09-09-2008 at 05:26 PM.
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(and where do you find one at Xantrex these days?), I'd opt for the "clean" solution rather than trust to what someone told you over the phone.

Bill
Amen to that! Finding good tech support or getting someone on the phone that knows more about paint than how to open the can, when calling Interlux for example, is a tough one in this day and age.

It took four phone calls to Westerbeke to find out the nominal filtration rating of my engine mounted fuel filter. Four phone calls to find out that it's "spec" is 3 micron. Then they said "that's just the spec."..? "So are they a 3 micron or not?" "Well that is what we spec them at.."..

I guess that means they have no quality control, never randomly check batches, and the spec could be what ever the Chinese manufacturer decides???

Glad I'm not the only one who can't get through to anyone who knows their ass from their eyeball!
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Quote:
Originally Posted by btrayfors View Post
No matter what Xantrex says, if you're gonna use an EchoCharge, I'd disconnect the second "channel" (i.e., the 2nd red wire from the charger).
That's probably what I'll do in any event, because...

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Originally Posted by btrayfors View Post
It's not a question of how much amperage; it's a question of flow control (or "interaction" as you correctly surmised at the beginning).
Yes.

Quote:
Originally Posted by btrayfors View Post
The EchoCharge is built exactly for what you wanna do. The charger's 2nd channel likely isn't as "smart". Leaving it connected could fool the EchoCharge into thinking the battery is at a higher level of charge than it really is.
It all depends on how the 10TB and Echo-Charge's outputs and sensing are designed. They might mess with one another and they might not. But, since the 10TB's two "channels" aren't really all that independent of one another, anyway, it makes more sense to remove all doubt and let the starter and house banks be handled the same at the dock as off the alternator: Main charge to the house bank, echo to the starting battery.

Quote:
Originally Posted by btrayfors View Post
Without getting to a real design engineer familiar with that particular charger (and where do you find one at Xantrex these days?), I'd opt for the "clean" solution rather than trust to what someone told you over the phone.
Agreed.

Jim
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