Post by rabird on Nov 13, 2017 17:12:40 GMT -8
One can get to 14.8v and that means nothing, one needs to keep it there for a considerable amount of time.
Then if you cycle regularly one will need to top charge or equalize monthly or more often to get the sg where it is FULLY charged.
One can take a battery and hit it with enough power to bring the voltage up to 14.8 immediately and its still 50%Soc but ya gotta let it sit at 14.8 and ABSORB for hrs. The battery makers say what the end conditions are usually in amps, the amps have declined to xx% of capacity while at 14.8. This could produce enough gas to mix the electrolyte. Lifeline AGMs like and need fast charging to FULL. They provide excellent documentation.
Altenatively they have come up with 'finish' charge after charging and that is an additional charge above 14.8v or whatever the battery makers suggest to finish or bring the sg up to FULL charge. Doing so lessens equalization and gets em very close to FULL.
This is nothing about solar or batt size, it is about returning enough energy to reverse the chemical reaction. Discharge batteries recharge at nearly 100% eff but as they approach FULL that eff drops like a rock. Often 110-115% energy needs to be returned, I believe it is higher than that but prefer shallow discharges. Battery monitors that report amps used and amps returned are useful.
My small battery is not all I deal with. But look at the questions here, I wanna run my entire house on a 35ah battery and 100 watt kit!
Folks wanna plug and play and have no idea how much sun they get or how much power they use. They buy first and ...
I generally capitalize FULL cuz it means something and getting there is important, regularly or you have the slow creep of lost capacity and inverter alarm. I've never had an inverter alarm!!! cuz something must be spinning for me to use an inverter and 12v appliances exist!
Ya want a battery that doesn't REQUIRE FULLY charging then get one of those or ya can keep the battery seller happy replacing batteries before their time.
Then if you cycle regularly one will need to top charge or equalize monthly or more often to get the sg where it is FULLY charged.
One can take a battery and hit it with enough power to bring the voltage up to 14.8 immediately and its still 50%Soc but ya gotta let it sit at 14.8 and ABSORB for hrs. The battery makers say what the end conditions are usually in amps, the amps have declined to xx% of capacity while at 14.8. This could produce enough gas to mix the electrolyte. Lifeline AGMs like and need fast charging to FULL. They provide excellent documentation.
Altenatively they have come up with 'finish' charge after charging and that is an additional charge above 14.8v or whatever the battery makers suggest to finish or bring the sg up to FULL charge. Doing so lessens equalization and gets em very close to FULL.
This is nothing about solar or batt size, it is about returning enough energy to reverse the chemical reaction. Discharge batteries recharge at nearly 100% eff but as they approach FULL that eff drops like a rock. Often 110-115% energy needs to be returned, I believe it is higher than that but prefer shallow discharges. Battery monitors that report amps used and amps returned are useful.
My small battery is not all I deal with. But look at the questions here, I wanna run my entire house on a 35ah battery and 100 watt kit!
Folks wanna plug and play and have no idea how much sun they get or how much power they use. They buy first and ...
I generally capitalize FULL cuz it means something and getting there is important, regularly or you have the slow creep of lost capacity and inverter alarm. I've never had an inverter alarm!!! cuz something must be spinning for me to use an inverter and 12v appliances exist!
Ya want a battery that doesn't REQUIRE FULLY charging then get one of those or ya can keep the battery seller happy replacing batteries before their time.
