H2O to H2SO4 ratio?

[SIGP2101]

What is the best approach to make sure that each cell contain same amount of H2O.

It is very hard to judge water level in each cell that needs to be fill up to.
I mean due to number of batteries in our banks and difference in temperatures they develop during EQ cycle H2O will evaporate at different rate causing difference in electrolyte level in each cell. Now challenge is how to establish proper ratio between H2O and H2SO4 in order for hydrometer to give proper reading in order to successfully maintain our B-banks.

Would community care to share their thoughts?

Thanks!

[Mike90250]

Assuming the batteries were filled properly at the factory, you only add enough distilled water to each cell, to bring it to the proper level. You may need a flashlight to see down in the battery.
Charging and discharging the battery strengthens or weakens the electrolyte, you never adjust it by adding any thing but distilled water. Charging the battery makes the acid stronger and you measure that with a temperature compensated Hydrometer.
This page from Trojan Battery explains and has photo of fill levels
It is normal for different cells in the same battery to require different amounts of distilled water. Good luck

http://www.trojanbattery.com/BatteryMaintenance/WateringDiagram.aspx

[inetdog]

If you use a filler bottle (no air vent) you can set how high the liquid level comes by controlling insertion of spout, so no need to see all cells well.
Never add anything but water, even if cell Specific Gravity is off from others when at full charge. Unless you have spilled some electrolyte that mismatch indicates a damaged or failed cell.