I think the CBA would work well so far from the little reading I have done. I have four 6 volt deep cycle batteries for my house bank and a Link monitor. I also have a simple analogue load tester. The problem is the solar panel masks any shortfall in the bank by fully charging usually before I make coffee in the morning. The house bank isn't quite as full on a rainy day and everything works but I would like to know how well. I probably should just leave it alone but if the bank is 100% charged but at 50% amp hour capacity I want to know. Len
> > > Message: 4 > Date: Mon, 6 Feb 2017 15:31:43 -0600 > From: Josh Muckley <muckl...@gmail.com> > To: "C&C List" <cnc-list@cnc-list.com> > Subject: Re: Stus-List Battery test > Message-ID: > <ca+zacrdhaecbwxgqppfm-3fx0ixkvh+3jthxaxf3n5-nyj6...@mail.gmail.com> > Content-Type: text/plain; charset="utf-8" > > Len, > > You can get an A-H meter for the boat which is a better gauge of available > charge than using a the typical voltage meter. With this you can get a > feel of health and performance by using the batteries as normal and > tracking their accumulated A-H to voltage. You'd probably want to keep an > ongoing graph to identify future outliers. It's not perfectly accurate. > As an addition or alternative you can get a load tester. It will have to > be something that provides a regulated test current, usually capacity > divided by 20 (C/20). A 100Ah battery would need tested at 5amps. > Typically you only go to 50% discharge (11.6v), so an auto shutoff is > prescribed for the most scientificly accurate tests. Be advised that under > these conditions the test on each battery will take ~10 hours. > > Check out the Computer Battery Analyizer. I have one and I'm impressed. > Very informative and powerful tool. > > http://www.westmountainradio.com/product_info.php?products_id=cba4 > > Josh Muckley > S/V Sea Hawk > 1989 C&C 37+ > Solomons, MD > > > On Feb 6, 2017 2:24 PM, "Mitchell's via CnC-List" <cnc-list@cnc-list.com> > wrote: > > Here is one for you electrical guys, my batteries are over 5 years old. I > have all LED lights, a 240 watt solar panel and modern refrigeration. The > batteries are working fine but there is no way they are still performing as > new. I would like to monitor their amp hour capacity as they age. Is there > a simple way to do it or do I need to take them into a battery shop? > 90 days to launch! > Len Mitchell > 1989 37+ > Crazy Legs > Midland On. > _______________________________________________ This list is supported by the generous donations of our members. If you wish to make a contribution to offset our costs, please go to: https://www.paypal.me/stumurray All Contributions are greatly appreciated!
