A water filling system called Aquamatik uses a hose system to provide centralised filling of all battery cells with battery water. It saves the time required, for example, to individually fill the 40 battery cells in a 80V battery by hand!

The attached Aquamatik cell plug stops filling automatically when the optimum electrolyte level has been attained.

Optionally, the charger can use a central water supply and a solenoid valve to completely automate water filling.