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. Sent from my mobile device. _______________________________________________ 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!
_______________________________________________ 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!
