An Annual Maintenance Contract (AMC) and IoT monitoring solve two different problems, and most facilities need both — but only one of them is watching your generator on the 29 days a month the technician isn't on site. AMC visits find issues that have already been building for weeks; IoT monitoring finds them within minutes of starting.
Quick take: An AMC is a scheduled inspection; IoT monitoring is continuous observation. They're not competing solutions — an AMC technician who receives your device's health data before a visit does a better inspection, and a facility with only an AMC and no monitoring is blind between visits.
What an AMC actually covers
A typical DG AMC includes a technician visit every 30-90 days for scheduled tasks: oil and filter checks, battery terminal cleaning, coolant level top-up, load bank testing, and a general visual inspection. This is genuinely necessary preventive work — no sensor replaces physically checking belt tension or looking for oil residue under the engine.
What it doesn't cover: anything that happens between visits. If a battery starts failing on day 3 of a 90-day AMC cycle, nobody finds out until day 90 — or until the generator fails to auto-start during an actual power cut, which is the worst possible time to discover it.
What IoT monitoring covers that an AMC structurally can't
- Continuous parameter tracking — battery voltage, coolant temperature, oil pressure, fuel level, and run hours logged every 10-30 seconds, not once per visit.
- Auto-start/stop verification — confirmation that the DG actually started and took load during a mains failure, rather than assuming it will based on last month's test.
- Fuel level and consumption tracking — catching abnormal fuel drops (theft or leaks) in near real time instead of at the next physical dip-check.
- Run-hour-based maintenance triggers — flagging that a service interval has been reached based on actual usage, not calendar time, which matters for generators with irregular runtime.
Side-by-side comparison
| Question | AMC alone | IoT monitoring alone | Both together |
|---|---|---|---|
| Physical component wear (belts, hoses, filters) | Caught at next visit | Not directly visible | AMC technician checks it, informed by data trends |
| Battery failing between visits | Missed until next visit or actual failure | Caught within minutes via voltage trend | Caught immediately, technician dispatched |
| Fuel theft | Caught at next dip-check, if noticed | Caught same day via consumption anomaly | Same as IoT column |
| Auto-start failure during a real outage | Discovered during the outage itself | Confirmed in real time; alert if it fails to take load | Same as IoT column |
| Documented compliance/audit trail | Visit reports only | Full continuous data log | Complete picture for auditors |
Why "we already have an AMC" isn't a reason to skip monitoring
This is the most common objection EddyBits hears from facility managers, and it comes from treating the two as substitutes rather than complements. An AMC contract obligates a vendor to show up on a schedule and perform physical tasks. It says nothing about what happens to your equipment on the other 27-29 days of the month. For a standby generator that might not run for weeks between mains failures, that gap is exactly when a battery, a sensor, or a coolant hose can quietly fail — invisible until the one moment you actually need the generator to work.
What to actually do
Keep the AMC for the physical, hands-on maintenance work it's built for. Add IoT monitoring for the continuous visibility an AMC schedule structurally cannot provide. Many EddyBits clients share dashboard access with their AMC vendor, so the technician arrives at each visit already knowing which parameters have been drifting — turning a generic inspection into a targeted one.
Frequently Asked Questions
Does IoT monitoring replace the need for an AMC?
No. An AMC covers physical, hands-on tasks — oil changes, filter replacement, belt inspection — that a sensor cannot perform or substitute for. IoT monitoring covers the continuous visibility gap between AMC visits.
Can our existing AMC vendor use the EddyBits dashboard?
Yes. Dashboard access can be shared with your AMC vendor or any third-party technician, so their scheduled visits are informed by real usage and trend data rather than a blind inspection.
How quickly would IoT monitoring catch a battery starting to fail?
Battery voltage is tracked continuously; a downward trend outside the normal range typically triggers a warning alert well before the battery is too weak to crank the engine.
Is it worth adding monitoring to a generator that already has a good AMC track record?
A clean AMC history reflects the equipment's state at each visit, not between visits. Monitoring is most valuable for exactly the failures an AMC schedule structurally cannot catch — sudden battery degradation, fuel theft, or an auto-start failure during an actual outage.