My batteries don’t last when there’s no sun I need help or recommendations

[Possibility008]

Check all cells SG? I find the Hydrovolt Pro hydrometer is the best out there.

I’ll try this, it’s a new battery wouldn’t it be better returning it than fixing it?. I made this post to be sure I’m not missing anything

And mostly importantly to be sure my design is not the issue

 

[Onehand]

That wont repair anything, it is merely a test, Electrolyte is proprietary, if you lose any, there isn't any replacing it, within reason. It would help tell you whether the batteries have a problem, or your design is at fault. Process of elimination trouble shooting.

 

[Possibility008]

That wont repair anything, it is merely a test, Electrolyte is proprietary, if you lose any, there isn't any replacing it, within reason. It would help tell you whether the batteries have a problem, or your design is at fault. Process of elimination trouble shooting.

Thank you very much

 

[400bird]

That wont repair anything, it is merely a test, Electrolyte is proprietary, if you lose any, there isn't any replacing it, within reason. It would help tell you whether the batteries have a problem, or your design is at fault. Process of elimination trouble shooting.

Wait, what? These are lead acid, you just add distilled water, right? Nothing proprietary about distilled water and battery acid.