Two choices: 1. Buy a cheap small charger for the house battery.
2. Sacrifice the long term well-being of the cheap wet-cell starting battery and set your charging parameters for the expensive AGM house bank. AGM voltages are close enough that the start battery lifespan will likely be pretty close to optimal anyway. Here is an example start-bank charger (http://www.ebay.com/itm/ProMariner-ProSport-Gen-2-6-12v-Boat-Battery-Charger-1-Bank-Waterproof-/161291965003?pt=Boat_Parts_Accessories_Gear&vxp=mtr&hash=item258dc0124b#ht_3309wt_1366) Joe Della Barba Coquina C&C 35 MK I From: CnC-List [mailto:[email protected]] On Behalf Of via CnC-List Sent: Monday, May 05, 2014 9:48 AM To: [email protected] Subject: Stus-List Mixed batteries In a pinch, I recently bought a 'starting' battery (Group 27) per my earlier post (no marine stores open after 6 on Saturdays) Then I decided to get a replacement for my dead Lifeline AGM battery. Of course, Murphy lurking about, I realized that my Zantrex Truecharge 40 wants all the batteries it charges to be the same since its charging schemes apply to all three outputs to the batteries. Before I pull the 'rope-a-dope' of returning the starting battery, I need some list advice: A lot of sailors suggest using a 'starting' battery exclusively for starting and using the house batteries for the house. I am aware that an AGM can be used for starting as well. However, if a 'starting' battery is better for this job (CCA, etc.) and the AGM is better for its job, how does one use a single charger like mine to satisfy different charging schemes? 2 chargers, a smarter charger that has outputs for different battery characteristics, or 'forgetaboutit" and charge both batteries as though the were both AGMs? Charlie Nelson Water Phantom C&C 36 XL/kcb [email protected]<mailto:[email protected]>
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