Chassis?Starter Grp 31 AGM. CROWN1 AGM?
I've been spending a few weeks trying to save my current CAT 8D Maintenance Free Starter Battery, due to an unfortunate few days of drain from Fog Lights being left on. (Pretty sure I have them back, ...
Forum Discussion
Your Cat maintenance free starter battery requireed a different charging protocol when deeply discharged.
Mex once told me to bring such a battery to 15v until amps taper to near zero.
I have noticed one maintenance free flooded battery exhibit this behavior more attune to an AGM, where they require 0.0x amps to be held at high voltages when fully recharged.
I've twice had to do this to my neighbors BMW starter battery which is in his trunk. I've also noted it tends to warm up quickly if fed more than 20 amps( about 75AH capacity). I've had to lower the voltage of my meanwell to the absolute bottom to keep amperage below this when first hooked up, then bump it up in stages until it reaches 15 and amps taper to near 0.
This specific maintenance free Battery has been drained to sub 11 volts twice in over 5 years that I know of and I suspect if I had not given it the 15v treatment it would not have made it this long.
When New, well after one deep cycle and a high amp recharge, the ability of my Northstar AGM battery to start my engine quickly was astoundingly quick. It has since lost that turbo cranking grunt, but still maintains over 11 volts when cranking an overnight cold 54f degree engine when 35Ah from full. When 65AH from full it now maintains over 10.2v and the engine still starts easily.
Its cranking ability when deeply discharged basically had me decide I did not even require a dedicated house battery in my current usage patterns. The only change I will make on my next battery is a group 31 instead of a 27.
I could fit 345Ah total of battery capacity, I have been making due with 90.
Mex once told me to bring such a battery to 15v until amps taper to near zero.
I have noticed one maintenance free flooded battery exhibit this behavior more attune to an AGM, where they require 0.0x amps to be held at high voltages when fully recharged.
I've twice had to do this to my neighbors BMW starter battery which is in his trunk. I've also noted it tends to warm up quickly if fed more than 20 amps( about 75AH capacity). I've had to lower the voltage of my meanwell to the absolute bottom to keep amperage below this when first hooked up, then bump it up in stages until it reaches 15 and amps taper to near 0.
This specific maintenance free Battery has been drained to sub 11 volts twice in over 5 years that I know of and I suspect if I had not given it the 15v treatment it would not have made it this long.
When New, well after one deep cycle and a high amp recharge, the ability of my Northstar AGM battery to start my engine quickly was astoundingly quick. It has since lost that turbo cranking grunt, but still maintains over 11 volts when cranking an overnight cold 54f degree engine when 35Ah from full. When 65AH from full it now maintains over 10.2v and the engine still starts easily.
Its cranking ability when deeply discharged basically had me decide I did not even require a dedicated house battery in my current usage patterns. The only change I will make on my next battery is a group 31 instead of a 27.
I could fit 345Ah total of battery capacity, I have been making due with 90.
