Advice on battery setup

[nithin]

Hello,

I am planning to setup a battery pack to be charged by a 100W solar panel that is made up of three sets of 4s 18650 cells in parallel(these to be specific: https://www.ebay.com.au/itm/Panasoni...53.m2749.l2649)

Based on the battery specification and from what ever i understood and series and parallel connections, the above setup should give me a base voltage of 14.8V with peak at 16.8V and 10.2 mA current.

My charge controller has the below ratings:

Nominal Voltage: 12V / 2V Auto Recognigition
Rated Charge Current: 30A
Max PV Input Voltage: 50 VDC
Equalization Voltage: Sealed: 14.6V; Gel-None; Flooded: 14.8V
Boost Voltage: Sealed: 14.4V; Gel 14.2V; Flooded: 14.6V
Float Voltage: 13.8V
Under Voltage: 12V
Self consumption: <13mA

I am also planning to use 4s bms boards with each set of 4s cells.

Could you please advice if i am on the right track or if i am going wrong in trying to set up a 12V battery back that i plan to run couple of water pumps on rated at 50W in total. Any suggestions would be useful. Thanks.

PS: The place i am setting this up gets on average 8-9 hours on sunlight.

Regards,
Nithin.

[Mike90250]

Waiting for someone schooled in Li batteries, all I know is that they are easy to light on fire.

Building a bank out of a bunch of cells is not safe in my book, far too many connections to go bad and make smoke

[Sunking]

What part are you not understanding? It takes a 16.8 volt CC/CV source to charge the batteries. There is only one controller that can do that, a Genasun GV-10-Li-16.7V 10 amp controller using a 60 cell 160 watt panel.

Bottom line is your panel and controller will not work.

[nithin]

Thank you for the feedback guys

[Guest]

Li-ion has a different charging profile then Lead-Acid. Your need to get a charge controller that is compatible with Li-ion or use Lead-Acid batteries with the charge controller you have.

[Higher Voltage]

I dont know much about li po but talk to this guy:https://www.youtube.com/watch?v=pYmu8CnnuNk

[Mike90250]

I dont know much about li po but talk to this guy:https://www.youtube.com/watch?v=pYmu8CnnuNk

Any why is he such a revered authority ?

Because you are telling a neophyte to trust his house, life, and expensive gear to somebody that was able to set up a youfool acct.