Maintenance program / SmartUPS 5000

[BillP]

I own (1) APC UPS, a SmartUPS 5000.  Which services gear that matters quite a bit to me.

Have any recommendations on how to maintain it?

My list:

- I run in-house code nightly which polls its alarm status, sends us email if it identifies any pathology.  [I have substantial confidence in this code (lots of years spent refining it at other outfits, where I managed flocks of APC gear)].

- Once / year:  perform a Runtime Calibration -- I figure this stresses the battery and will cause it to fail, if it is nearing failure anyway.

- Replace the battery proactively ... once every 3 years?  once every 5 years?

And then, how to handle UPS repair, along with battery replacement?  Purchase this service ad hoc, as needed, from a local APC service provider?  Or purchase a maintenance plan ...  'Single Phase Service Advantage Plan'?  [My goals:  if the UPS should fail in some way, I want to hire someone to fix it.  If the UPS needs a replacement battery, I want to hire someone to replace it for me.]

Suggestions?

--sk