This is a good write-up too, I think: http://forums.catalina.sailboatowners.com/showthread.php?t=137615.
Also it describes the basic function and differences between the Echo-charger and the more ‘traditional’ combiners like the Blue Sea and Yandina. Similar to the Echo-charger is the Balmar Duo Charge ($$). I’ve also seen discussions of the Magnum Smart Battery Combiner: http://magnumenergy.com/smart-battery-combiner-me-sbc/ and the Victron Cyrix line of combiners: http://www.victronenergy.com/battery-isolators-and-combiners Regarding the Yandina, if it sees a low voltage on one of the banks, it cycles charging to try to bring the low bank up to a point where it can accept a constant charge. From: Josh Muckley via CnC-List Sent: Monday, March 30, 2015 6:28 AM To: Richard N. Bush ; C&C List Subject: Re: Stus-List New Wiring Diagram Draft (Edd Schillay) Try this to start. http://www.yandina.com/combInfo.htm Josh On Mar 30, 2015 8:54 AM, "Richard N. Bush via CnC-List" <cnc-list@cnc-list.com> wrote: I have been reading this thread about the wiring and the charging avidly, but I have no training in electrical engineering and I am having difficulty figuring out how all this comes together... is there a way someone could summarize this in layman's (rank beginner) terms? I would like to know how the theory and the real wiring/charging system come together on the boat, I guess on Edd's boat in this instance, but, of course, I am looking to see how I can apply it in understanding and upgrading the system on my boat as well..... I recognize that the systems are going differ from boat to boat, but surely the principles must be the same? Many thanks.... Richard 1985 C&C 37 CB; Ohio River, Mile 596; Richard N. Bush 2950 Breckenridge Lane, Suite Nine Louisville, Kentucky 40220-1462 502-584-7255 -----Original Message----- From: Rick Brass via CnC-List <cnc-list@cnc-list.com> To: 'Peter Fell' <prf...@gmail.com>; cnc-list <cnc-list@cnc-list.com> Sent: Mon, Mar 30, 2015 8:38 am Subject: Re: Stus-List New Wiring Diagram Draft (Edd Schillay) In a 12 volt setup, 10.5v of differential between the fully charged/charging bank (12.6 to 14.4v) and the depleted bank would probably mean that the depleted bank has something wrong with it – maybe some shorted cells. In a 24 volt setup with 12 cells, the fully charged/charging bank would be at 25.2 to 28v. The 10.5v differential would put the discharged battery at 1.5v per cell – seriously discharged. The high voltage differential would normally cause a high current flow, so I assume the Echo Charge is programmed to limit the current because of the heat from high current. If I recall correctly, the Blue Sea 12v ACR that I have on Imzadi is designed to not open if either of the connected batteries is below something like 10.5 or 11 volts. That prevents current flowing from a good battery bank into a bad one. Rick Brass Washington, NC
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