The monsoon front hit Salt Lake at 6.42 pm on a Tuesday in late June. First the lights blinked. Then they blinked again. On the third dip the UPS in the server cupboard buzzed for eleven seconds and went silent. Two servers, one switch, and the SAP terminal for the customs clearing team all dropped together. It was the busiest hour of the busiest week of the quarter.
I got the call at 8.11 pm. The IT lead had rebooted the UPS twice by then and it was throwing a low-battery alarm on a full mains supply. The batteries were the problem. They had been the problem for months, only nobody had checked.
What actually failed that evening
The UPS was a 6 kVA online double-conversion unit, correctly sized when the office moved in. Load was measured at 3.8 kVA. Runtime on paper: 22 minutes at half load. Enough to ride out a short cut, plenty to run a graceful shutdown on a longer one. The specification was fine.
The battery string was three and a half years old. Rated life on tubular VRLA in an office rack, at Kolkata ambient, is closer to three years than the marketing sheet’s five. Fuji Electric’s own technical guide says so plainly: batteries are electrochemical, they age with heat cycles, and they need replacement every three to four years regardless of what the UPS front panel shows (Fuji Electric UPS replacement guide). At month 42 the string was holding maybe 60 percent of rated capacity. On the third dip that night, the batteries could not carry the shutdown ramp for the servers. Everything crashed hard.
What a sized UPS on its own actually buys you
A sized UPS gives you three things and only three things. Clean voltage to sensitive kit. A window to shut down without corrupting data. A place for a generator to hand over to, if you have one. That is it.
It does not stop the power cut. It does not maintain itself. It does not tell you the batteries are ageing unless someone reads the panel or a monitoring tool pushes an alert.
The sizing question and the maintenance question are different questions. Most Indian offices only answer the first one, at buy time, then never revisit either. That is the entire failure pattern in one sentence. If you want the sizing walkthrough on its own, we wrote it up here: sizing a UPS for an Indian office.
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What an AMC actually does, in plain words
An Annual Maintenance Contract for a UPS is a paid promise that a trained engineer will visit at set intervals, run preventive checks, and respond inside an agreed SLA when the box screams. It sounds boring. It is boring. It is also the difference between a 12-minute recovery and a three-hour one.
A comprehensive AMC in India, for a 5 to 20 kVA online UPS, usually covers scheduled inspections every quarter, battery health checks with load testing, firmware updates, and free replacement of internal components such as fans, boards and worn capacitors when they age out. Response times run 4 to 8 hours in metros and up to 24 in tier-2 cities. Activolt and Indus Power publish this scope openly (Activolt AMC guide, Indus Power all-inclusive AMC). The pattern is consistent across serious vendors.
The line that trips people up: batteries are almost always excluded from the base AMC. So is the battery add-on that some vendors offer as a separate line item. Read the annexure before you sign, not after the string dies.
What does UPS AMC cost in India, honestly
The public tender record is a useful sanity check because government banks publish real quotes. A comprehensive 20 kVA online UPS AMC at BDC Digiphoto landed at ₹21,500 per unit per year. Indian Bank’s Lucknow zonal office AMC tender for a fleet mixing 1, 2, 3, 5, 6, and 10 kVA units set a comparable per-unit range (Indian Bank UPS AMC tender). For a small office running one 5 to 10 kVA online UPS, budget between ₹4,000 and ₹18,000 per year for the AMC alone, and add a separate line for a battery swap every three years.
Compare that to the cost of one evening’s downtime for the Kolkata clearing agent. Their gross billing that Tuesday evening was ₹92,000 across four container files. All four got pushed to the next day. Two of the four missed a customs slot and had a demurrage catch-up bill of about ₹28,000 combined. Real damage from a three-hour stall on a single evening: roughly ₹1.2 lakh, before you count the goodwill hit with the importer.
The three AMC tiers, side by side
Here is what actually differs between the three common tiers we see in Indian office estates. This is the version we walk clients through before they sign.
| What you get | No AMC | Non-comprehensive AMC | Comprehensive AMC |
|---|---|---|---|
| Preventive visits | None | 2 per year | 3 to 4 per year |
| Battery health test | Never | On visit | Every visit with load test |
| Parts (fans, caps, PCB) | Billed at breakdown | Billed separately | Included |
| Batteries | Billed at breakdown | Excluded | Excluded (add-on) |
| Response SLA (metro) | Whenever you can get a bay | Next business day | 4 to 8 hours |
| Rough annual cost, 10 kVA online | ₹0 (until it breaks) | ₹6,000 to ₹8,000 | ₹10,000 to ₹18,000 |
Most Indian offices that get burned are not the ones on no AMC. They are the ones on a non-comprehensive AMC who assumed batteries were covered. Read the contract, then re-read the exclusions.
What we changed for the Kolkata clearing agent
We did not upsell them a bigger UPS. The 6 kVA box was fine. Here is the four-line fix, in the order we did it.
Swapped the entire battery string over a Saturday. New tubular VRLA, matched cells, dated stickers on the case so nobody guesses next time. Cost, including labour: about ₹34,000.
Moved them from a bare warranty to a comprehensive AMC with quarterly visits and a 6-hour metro SLA. Annual cost: ₹12,600 for the one 6 kVA online unit.
Installed remote battery monitoring. It reads cell voltage and internal resistance and pushes an email alert when a cell drifts. This is the piece most offices skip. It is the single thing that would have caught the ageing string at month 30 instead of month 42.
Wrote a one-page runbook the office manager can actually use. What to do when the UPS beeps. Whom to call. What not to touch. Stuck it on the server cupboard door.
17+ years fitting UPS and AMC for Indian businesses. Response within 8 hours.
Where BPE fits, and when we recommend it
We stock BPE across the small-office and server-room bands because the sizing is honest, the batteries are serviced in-country, and the AMC network reaches tier-2 cities the imports quietly avoid. It is not the only brand we fit. It is the one we reach for when a client wants a made-in-India power stack that a local engineer can service inside a working day. The full brand page and current fit-out options are here: BPE UPS India.
If you are still deciding on the sizing itself, the two neighbours to this piece are worth reading. On battery choice, we broke down the money question here: lithium vs VRLA batteries for UPS. On when to buy modular instead of a monolithic box, we covered the growth case here: when a modular UPS makes sense.
The one habit that changes the odds
Book the first AMC visit for the week the warranty expires. Not the month. The week. Put it in the office calendar the day the UPS is installed. Then, every year on the anniversary, the office manager gets a nudge and the engineer gets a slot.
That single habit, more than any brand choice, is what separates the offices that ride out a monsoon evening from the offices that lose three hours of billing. It costs nothing. It saves the thing that actually hurts, which is not the UPS repair, it is the customer call the next morning.
FAQ
What does a UPS AMC actually cover?
Preventive visits, battery health checks with load testing, firmware updates, and replacement of internal parts like fans, capacitors, and PCBs. On comprehensive plans, parts are included. On non-comprehensive plans, parts are billed separately.
Does the AMC cover UPS batteries?
Usually not. Batteries are treated as consumables and excluded from the base AMC. Some vendors offer a battery add-on plan. Read the contract annexure before you sign, and budget for a battery swap every three years in an office rack.
How much does UPS AMC cost per year in India?
For a 5 to 10 kVA online UPS, a comprehensive AMC in a metro runs about ₹6,000 to ₹18,000 per unit per year, based on the public tender record. A non-comprehensive plan is lower, around ₹4,000 to ₹8,000, with parts billed separately.
How fast should the AMC engineer respond?
Metro comprehensive plans set a 4 to 8 hour response SLA. Tier-2 cities are typically 24 hours. Tender contracts add per-day penalty clauses if the vendor breaches SLA (the LIC Nadiad division set it at 1 percent of daily AMC cost from day 3, escalating to 4 percent beyond day 15). Ask what the SLA breach clause is before you sign.
How often should we replace UPS batteries?
Every three to four years in an office rack, and every 2.5 to 3 years in a server room, per APC’s published guidance and the industry norm. Dated stickers and cell-voltage monitoring make the swap predictable instead of surprising.
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P.S. Sudeep here. The clearing agent above is a real client, anonymised. We shipped the fix over two weekends and the total damage-plus-fix ran to about ₹58,000, which they would rather have spent on the AMC in the first place. If your office UPS is past year three of its battery string, book the check. It is the cheapest hour of insurance you will buy this quarter.