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Location: Arlington, VA
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Re: Echo Charger with standby battery bank
Let's not make this more complicated than it is.
If there's a charging voltage on the main battery -- and a float voltage of 13.2-13.6VDC qualifies as a charging voltage -- then the EchoCharge will pass thru some current to the auxiliary battery.
If the main battery voltage falls below about 13VDC, as it would if all charging sources were removed, then the EchoCharge will cut off.
A solar panel has plenty of potential to keep the voltage above 13VDC, so long as there is light. When there is no light or very low light and the voltage falls below 13.0, then the EchoCharge will cut off.
Whether or not this is sufficient to your needs would depend on your setup...type/size of batteries, size of solar panel, type of controller, other charging sources, how you use the boat, etc.
BTW, your original post said 24V. Is this a 24V system? Details, please.
Last edited by btrayfors; 05-24-2012 at 12:47 AM.