How do I manage battery replacement across hundreds of sites?

The shift that saves money is from reactive to planned replacement, and it needs three things. An age and condition register, date codes captured at installation, not reconstructed later. Condition data, impedance trend at minimum, remembering that impedance indicates trend rather than measuring capacity. And a replacement policy based on published benchmarks rather than on failure: Powerlink’s stated nominal replacement age for substation VRLA is 12 years for 2 V cells and 8 years for 12 V monoblocs, which is a useful starting point for a monobloc telecom fleet. The saving is not in the batteries; it is in converting emergency callouts into scheduled work.