cereal tiller Posted June 7, 2017 Report Share Posted June 7, 2017 Have just Installed 6 of these,they are described as CA/CA ,the Yuasa website does not state the charging or float voltage Have not used CA/CA before,am thinking that 14.6 Volts for charge and 13.8 for Float would be about right? CT Link to comment Share on other sites More sharing options...
cuthound Posted June 8, 2017 Report Share Posted June 8, 2017 Ca/Ca batteries are lead acid batteries that have had calcium added to both the positive and negative plates. Calcium adds mechanical strength to the plates, and reduces internal self discharge and gassing when on charge . However they do require a slightly higher charging voltage, typically 0.5 volts higher for a 12 volt battery than a pure lead acid battery. So around 14.8 volts for alternator charging and for a multi-stage charger, bulk 15.2 volts, float 14.2 volts. 1 Link to comment Share on other sites More sharing options...
cereal tiller Posted June 8, 2017 Author Report Share Posted June 8, 2017 10 minutes ago, cuthound said: Ca/Ca batteries are lead acid batteries that have had calcium added to both the positive and negative plates. Calcium adds mechanical strength to the plates, and reduces internal self discharge and gassing when on charge . However they do require a slightly higher charging voltage, typically 0.5 volts higher for a 12 volt battery than a pure lead acid battery. So around 14.8 volts for alternator charging and for a multi-stage charger, bulk 15.2 volts, float 14.2 volts. Thank you Cuthound,will Charge to those Numbers. CT Link to comment Share on other sites More sharing options...
Tony Brooks Posted June 8, 2017 Report Share Posted June 8, 2017 40 minutes ago, cuthound said: Ca/Ca batteries are lead acid batteries that have had calcium added to both the positive and negative plates. Calcium adds mechanical strength to the plates, and reduces internal self discharge and gassing when on charge . However they do require a slightly higher charging voltage, typically 0.5 volts higher for a 12 volt battery than a pure lead acid battery. So around 14.8 volts for alternator charging and for a multi-stage charger, bulk 15.2 volts, float 14.2 volts. In now way disagreeing with the Hound but that is for optimum charging. They will still charge properly at 14.6 but just take a longer time. Probably not what is wanted on most canal boats. Link to comment Share on other sites More sharing options...
smileypete Posted June 13, 2017 Report Share Posted June 13, 2017 (edited) Sorry this doesn't sound helpful but it could be worth just contacting Yuasa and asking them... If they fail or underperform down the line it should help if their charging recommendations have been followed. Edited June 13, 2017 by smileypete Link to comment Share on other sites More sharing options...
cereal tiller Posted June 24, 2017 Author Report Share Posted June 24, 2017 On 6/8/2017 at 09:44, Tony Brooks said: In now way disagreeing with the Hound but that is for optimum charging. They will still charge properly at 14.6 but just take a longer time. Probably not what is wanted on most canal boats. On 6/13/2017 at 20:50, smileypete said: Sorry this doesn't sound helpful but it could be worth just contacting Yuasa and asking them... If they fail or underperform down the line it should help if their charging recommendations have been followed. Thanks Chaps,there was no Info. on the Yuasa Website and no reply from the Email I sent them. They are now being charged by Boat's Engine or the DC Diesel Generator at 14.8,and Shoreline charging at 15.2 Bulk/Absorb then 14.2 Float Unusual not to get any signs of Gassing at 15.2,but all seems good CT Link to comment Share on other sites More sharing options...
rusty69 Posted June 24, 2017 Report Share Posted June 24, 2017 15 minutes ago, cereal tiller said: Thanks Chaps,there was no Info. on the Yuasa Website and no reply from the Email I sent them. Pretty poor from Yuasa! Or Yuasaless 1 Link to comment Share on other sites More sharing options...
smileypete Posted July 1, 2017 Report Share Posted July 1, 2017 (edited) On 24/06/2017 at 11:03, cereal tiller said: Thanks Chaps,there was no Info. on the Yuasa Website and no reply from the Email I sent them. They are now being charged by Boat's Engine or the DC Diesel Generator at 14.8,and Shoreline charging at 15.2 Bulk/Absorb then 14.2 Float Unusual not to get any signs of Gassing at 15.2,but all seems good CT Ah well. If they're 'maintenance free' wet batts, a look at the tail current will help tell how much gassing is going on, very low tail current will mean little or none. A little gassing shouldn't hurt and may help keep the electrolyte mixed and keep it from stratifying. Edited July 1, 2017 by smileypete Link to comment Share on other sites More sharing options...
cereal tiller Posted July 1, 2017 Author Report Share Posted July 1, 2017 30 minutes ago, smileypete said: Ah well. If they're 'maintenance free' wet batts, a look at the tail current will help tell how much gassing is going on, very low tail current will mean little or none. A little gassing shouldn't hurt and may help keep the electrolyte mixed and keep it from stratifying. The tail current will drop to 0.68 AMP. at 15..2 Volts and a similar figure at 14.2 Have used a Stethoscope on the Battery casings,complete silence..Spooky Link to comment Share on other sites More sharing options...
rusty69 Posted July 1, 2017 Report Share Posted July 1, 2017 16 minutes ago, cereal tiller said: Have used a Stethoscope on the Battery casings,complete silence..Spooky Maybe instead of electrolyte, yours are full of electroplasm Link to comment Share on other sites More sharing options...
cereal tiller Posted July 1, 2017 Author Report Share Posted July 1, 2017 Just now, rusty69 said: Maybe instead of electrolyte, yours are full of electroplasm Oh dear,who am i gonna call! Link to comment Share on other sites More sharing options...
rusty69 Posted July 1, 2017 Report Share Posted July 1, 2017 Just now, cereal tiller said: Oh dear,who am i gonna call! Dunno, do tell? Link to comment Share on other sites More sharing options...
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