Why use calcium grids in VRLA batteries for deep cycle applications? Some say calcium grids don’t do well in flooded deep cycle

Flooded calcium alloy makes a very efficient low resistance battery, excellent for starting and low DOD cycling applications. However, when deeply discharged, the plates release all their available power, eventually causing plate shedding and active material fall-out. In contrast, with flooded antimony batteries, the antimony helps lock the active material onto the grid. Therefore, the plate does not shed as easily, which extends the deep cycle (DOD) life of the battery when compared to flooded calcium.

A high quality Discover™ VRLA calcium alloy battery is also very efficient with low resistance. However, when deeply discharged, the electrolyte is used up before the plates are totally discharged because the battery is “acid-starved.” This feature:

* Limits the discharge the plates can deliver.
* Protects the plates from shedding due to deep discharge.
* Extends the life of the battery.