UPS replacement and modernization planning

Sales status is not service status

Manufacturers publish two different things, and confusing them is a frequent planning mistake:

• Sales status: whether the model is still sold. A discontinued model can still have full parts and service support for years.
• Service phase: how much support the model still gets. For example, Eaton’s end-of-service-life table lists phases from full support, through best-efforts support with limited parts, to retired and end of service life ¹.

A plan built on sales status alone replaces equipment too early or too late. We read both, per model, from the manufacturer’s documents.

How a plan is built

1. Asset list: make, model, serial, install date, battery date and load for every UPS.
2. Manufacturer status: sales status and service phase, with dates, from the manufacturer’s own documents.
3. Condition: from the last maintenance visit: battery impedance trend, wear parts, alarms.
4. Options per unit:
   • keep and maintain;
   • extend with a manufacturer life-extension programme where one exists;
   • replace like for like;
   • modernize (lithium-ion, modular, higher efficiency).
5. Plan and budget: what to replace when, grouped by year, with the work sequenced so loads are never unprotected.

Modernization options

• Lithium-ion batteries in UPS models designed for them: longer life and a smaller footprint ².
• Modular UPS: capacity added in modules, and redundancy (N+1) inside one frame.
• Higher-efficiency modes offered by some manufacturers ³.