Seventy-Two Volts, Thirty-Six Cells, One Connection
AWS-36 · 36 heads · 60L tank · 72V traction packs
A long string behaves differently from a short one, and the difference is not about voltage — it is about time and distance. Thirty-six cells take longer to fill, the run from the tank is longer, and the cells at the far end see the lowest pressure in the system. A kit that ignores this fills unevenly, no matter how good the valves are.
Two Sizes of Pipe, Two Jobs
The 6mm line feeds the heads. It is small because each valve only needs a trickle, and because a small bore is easy to route between cells and interlinks. The 10mm line carries water from the tank to the indicator and along the pack, where volume matters more than flexibility. Running the supply through the small size is the reason some installations "fill slowly at the back" — the pressure drop, not the valves, is the limit.
Why the Tank Is 60L
Thirty-six cells consume roughly three times the water of twelve. A 30L tank would need a refill mid-pack on a dry battery, and a refill mid-pack is the moment when an operator decides the system is more trouble than a jug. The 60L tank makes one connection sufficient, which is the entire proposition.
Kit Content for a 36-Cell String
| Watering heads (T-piece) | 36 pcs |
| Flow indicator with filter | 1 pc |
| 6mm pipe / 10mm pipe | 8 m / 10 m |
| End plugs / K10 coupling | 2 pcs / 1 pc |
| Water tank | 60 L |
What the Operator Does
Connect the coupling, open the supply, watch the indicator. When movement stops, every valve in the string is closed and every cell is at level. Disconnect and put the tank away. That is the whole procedure — no caps removed, no cell inspected, no decision made.
For a supervisor, the check is equally short: walk the pack and read the lenses on the heads. Any head reading lower than its neighbours is either not seated or has a valve holding open, and both are visible without tools.
Temperature and Electrolyte
Tilting the top cover of a head exposes the electrolyte, which is how a commissioning engineer checks temperature and, if needed, takes a sample. It is not part of the watering routine; it is the access the system preserves so that servicing does not require removing a cap and breaking the seal.
Maintenance Over a Season
Monthly, the fill. Quarterly, the filter and the pipe ends. Annually, one head lifted to confirm the float is free. Everything else is a visual check that costs a minute per pack — which is why the routine survives contact with a busy shift.
Ordering
Confirm the cell count from the battery, not from the truck's nominal voltage. A 72V traction pack is normally 36 cells and matches this kit; a pack built as 40 cells takes the AWS-40. Send the count and the tray layout, and the kit is supplied as a set.
