I had two gel cell batteries on my 27-5. I took one home over the winter and put it on a smart auto trickle charger. It was dead when I put it back on the boat. The one I left was still working. I replaced them with flooded and had no problems over the winter. Flooded were a fraction of the price. Jerry
Sent from my iPhone > On Oct 16, 2018, at 5:46 PM, Josh Muckley via CnC-List > <cnc-list@cnc-list.com> wrote: > > Just because it works doesn’t mean that you are going to get optimal results. > Follow the link below to see the differences between flooded and AGM > > https://www.trojanbattery.com/pdf/TrojanBattery_UsersGuide.pdf > > Josh > >> On Tue, Oct 16, 2018, 4:47 PM Robert Boyer <dainyr...@icloud.com> wrote: >> I have been cruising for over 2 years with 4 AGMs (Group 31) and a 110-amp >> alternator plus solar panels. Smart regulator was not needed. >> >> Bob >> >> Bob Boyer >> S/V Rainy Days (1983 C&C Landfall 38 - Hull #230) >> Blog: dainyrays.blogspot.com >> Email: dainyr...@icloud.com >> Annapolis, MD >> >>> On Oct 16, 2018, at 4:42 PM, Josh Muckley via CnC-List >>> <cnc-list@cnc-list.com> wrote: >>> >>> David, >>> >>> You need to look at the battery manufacturer's info to know the charge >>> profile for your batteries. To change the alternator charge profile you'll >>> probably need to install an external regulator. The most important part of >>> the profile is the max charging voltage. Most AGMs are limited to 14.6 but >>> it could be lower. Some stock alternators have a default max voltage of >>> 14.4v. This gives some flexibility and margin. >>> >>> Josh >>> >>> On Oct 16, 2018 11:26 AM, "David Knecht via CnC-List" >>> <cnc-list@cnc-list.com> wrote: >>> I have AGM batteries and they are charged exclusively by the alternator or >>> solar panel. In neither case do I know of a way to regulate the charging >>> for compatibility with AGM. The charger for shore power is set for AGM, >>> but I rarely use it. Is there something I should be doing with the >>> alternator with the AGMs? Thanks- Dave >>> >>> S/V Aries >>> 1990 C&C 34+ >>> New London, CT >>> >>> >>> >>>> On Oct 16, 2018, at 11:10 AM, Rick Brass via CnC-List >>>> <cnc-list@cnc-list.com> wrote: >>>> >>>> You should also be aware that there are different types of chemistry in >>>> AGM batteries. My new ProNautic charger has 4 different programs for >>>> charging AGM batteries, and at least one of those is pretty much identical >>>> to the programs available for lead-acid. But the instruction manual for >>>> the charger tells you to be sure to contact the battery supplier to >>>> identify the exact type of AGM you are using so you can be sure to setup >>>> the proper charging profile. >>>> >>>> Have you thought about going to Lithium batteries? A boater on my dock is >>>> in process of installing 4 of them on his O’Day. Cost of the batteries is >>>> about $300 each – which isn’t dramatically higher than good AGMs, His bank >>>> will be between 400 and 500 AH (I forget exactly what he told me), but >>>> with Lithium batteries you can use more than 50% of the bank capacity >>>> without harming the batteries… you just need the correct charge profile >>>> (and a higher capacity charger). >>>> >>>> Rick Brass >>>> Washington, NC >>>> >>>> >>>> >>> _______________________________________________ >>> >>> >>> Thanks everyone for supporting this list with your contributions. Each and >>> every one is greatly appreciated. If you want to support the list - use >>> PayPal to send contribution -- https://www.paypal.me/stumurray >>> >>> >>> <pastedGraphic.tiff> >>> _______________________________________________ >>> >>> Thanks everyone for supporting this list with your contributions. Each and >>> every one is greatly appreciated. If you want to support the list - use >>> PayPal to send contribution -- https://www.paypal.me/stumurray >>> > <pastedGraphic.tiff> > _______________________________________________ > > Thanks everyone for supporting this list with your contributions. Each and > every one is greatly appreciated. If you want to support the list - use > PayPal to send contribution -- https://www.paypal.me/stumurray >
_______________________________________________ Thanks everyone for supporting this list with your contributions. Each and every one is greatly appreciated. If you want to support the list - use PayPal to send contribution -- https://www.paypal.me/stumurray
