Keep a hospital, airport or data centre on line through every outage: the battery takes it first, so short interruptions never start the engine, and long ones burn less fuel.
Example site: A hospital, airport or data centre with a diesel generator. What happens there
A hospital, airport or data centre with a diesel generator
Today every supply interruption starts the engine, however short. That means fuel bought and delivered, run hours and maintenance, and an engine running at whatever load the site happens to draw.
Fewer engine starts, shorter runs at better loading, and every run logged with its runtime and fuel.
Put a battery in front of the generator and let one controller sequence the two. The battery takes every outage first, carrying the site through the gap that used to wait on the engine, so short interruptions never start it; on long ones the engine runs properly loaded, recharges the battery and stops sooner. Ingro EMS-CP does this and logs every run, so the saving shows up in litres and hours you can check.
The DG set starts every time the grid trips, even for a few minutes, and the seconds before it takes load are bridged by room UPS units or not at all. It was sized for the worst day, so it spends most runs lightly loaded. Diesel is bought in bulk, hours are written in a notebook, and nobody can tie litres to load. Air-quality restrictions, pricier CPCB IV+ sets and Scope 1 reporting make every engine hour harder to justify, and an outage that reaches a ward, a terminal or a server hall is not acceptable at all.
Written for
Facility, engineering, utilities and finance heads at hospitals, airports, data centres, telecom sites and control rooms that rely on diesel backup
What it costs you today
Brief interruptions start the set anyway, and the seconds before it takes load still reset equipment and lean on room UPS units. The site pays for the start, the wear and the risk for a few minutes of running.
A set sized for motor inrush or future expansion runs well below rating, burning more diesel per unit and wet-stacking. On CPCB IV+ sets, light load also starves the after-treatment of the exhaust heat it needs to regenerate.
Diesel purchased, logbook hours and the load actually carried rarely tie up, so leakage, pilferage and idle running stay hidden. Finance cannot tell a real saving from a quieter month.
In the NCR, graded air-quality restrictions limit DG use for industrial and commercial users unless sets are converted or retrofitted. A new set must meet CPCB IV+, which has raised the price of adding capacity.
Ingro EMS-CP is an energy management system for critical sites, such as hospitals, airports and data centres, where supply must not drop. It sequences battery storage and standby generation on supply failure. The battery responds to every outage first; the generator starts only when the outage outlasts stored energy, and recharges the battery while it runs. Where the site has solar, it runs alongside the engine, held back only as far as the engine's minimum load requires.
Short interruptions — the majority of them — never start the engine at all. When an outage does extend beyond battery endurance, the generator runs inside its efficient loading band and directs surplus output to storage, which shortens its own run and cuts fuel within each hour as well as hours overall.
Ingro EMS is a made-in-India energy management system, designed, built and supported in India. It is supplied to BESS integrators, EPC contractors and developers to go inside the battery systems they build, and to replace a locked or underperforming controller on an existing one. Or Ingro delivers the whole system, from sizing to O&M.
A hospital and a data centre run the same controller. What differs is the reserve held back and how much authority you give it over the engine. A factory with a DG is EMS-CI with the generator option.
Ingro EMS-CP reads every meter and talks to the systems that make, store, use and switch energy on the site, then runs them to one plan on every control cycle. The battery is one of the things it controls.
Nothing at a hospital, airport or data centre may drop, so the battery answers every outage first. The engine starts only when an outage outlasts stored energy, runs at an efficient load, and puts its spare output back into the battery so its run ends sooner.
Short outage
Illustrative. Not measured data.
Most interruptions are short. The battery carries the site through without a break, and the engine never starts.
When the outage outlasts the battery, the engine starts and runs inside its efficient band. Its spare output recharges the battery; once that is done the engine stops and the battery carries the site again.
Without a battery, the engine starts for every interruption, however short, and runs at whatever load the site happens to draw.
The battery responds to every outage first — short interruptions never start the generator.
The generator runs only beyond battery endurance, recharging the battery and, with solar carrying part of the load, shortening its own run.
Fewer running hours at higher loading, with every run logged automatically.
Recorded runtime and fuel data to support right-sizing at the next replacement.
Each lever EMS-CP pulls lands somewhere you can check, on a bill line, in a log or in a monthly report. No figure here is a promise: the application book works them in your own tariff and duty.
Interruptions shorter than the battery's endurance are carried without a start, which removes whole engine runs along with their start-up fuel, wear and service hours.
Where you see itStarts and run hours per month in the Diesel generator operations & fuel displacement report, set against the old logbook and the engine hour meter.
When the engine does run, it is held in its efficient loading band and the surplus recharges the battery, so it burns less per unit and shuts down sooner. This needs a DG controller that accepts a load setpoint.
Where you see itLitres per unit generated and loading during each run in the monthly generator report, checked against the diesel purchase register.
The battery carries the part of the peak above the existing set's comfortable rating, so the set stays inside its envelope and the CPCB IV+ purchase, consent and space it would bring are avoided or postponed.
Where you see itRecorded engine loading against rating over several months, compared with the quote for the new set.
Every start is logged with its reason, duration and loading, which is the record inspections and consent conditions ask for and the diesel figure Scope 1 reporting needs.
Where you see itThe monthly run log produced automatically, and diesel litres carried into the BRSR or sustainability report.
CFO / Finance
Diesel spend falling in the purchase register, with a fuel figure that reconciles rather than an estimate.
Utilities / maintenance head
Engine protected, its limits respected, the AMF still in charge if the EMS fails, and fewer service calls.
EHS / compliance manager
A run log that stands up to the pollution board, air-quality restrictions and Scope 1 disclosure.
Medical superintendent / operations head
Wards, terminals or server halls never notice a cut while the generator starts, and critical equipment stays on its own UPS.
Put these to every supplier on the shortlist, us included. A supplier that can't answer one in writing is telling you something.
These are the lines that end up in the specification for EMS-CP. Ask every supplier to answer each one in writing. Read the common questions.
Without a load setpoint you save run hours but not fuel per hour, and you should know that before you sign.
A badly coordinated battery causes the wet stacking and reverse-power trips it was meant to prevent.
An optimiser that breaks them costs more in overhauls than it saves in diesel.
Backup that depends on the EMS being healthy is not backup.
A modelled saving presented as measured falls apart the first time finance checks it against purchases.
The outage pattern decides how many starts disappear; a generic figure either oversizes the battery or leaves the engine starting anyway.
10 questions
In two ways. The battery answers every outage first, so short interruptions never start the engine — that removes running hours. When the engine does run, the controller holds it inside its efficient loading band and directs surplus output into storage, which reduces fuel burnt within each hour and shortens the run itself.
Only if you grant it that authority. Start authority is a configuration setting: whether the controller may start and stop the engine, and the power deficit at which it is entitled to do so. Warm-up, cool-down, minimum run time, minimum time off and maximum starts per day are enforced as hard constraints on every decision.
No. The generator is kept as reserve. The battery answers every outage first, and the engine starts only if the outage outlasts stored energy, so short interruptions, which are the majority, never start it.
Usually not; the engine stays and what matters is its controller. With remote start and stop the battery can take the short outages; to keep the engine properly loaded on long ones the controller must accept a load setpoint, which on an existing engine is usually a controller upgrade rather than a new set. We confirm it from the make and model during discovery.
It reduces how often the set has to run at all, because outages within the battery's endurance are carried without it, and every run is logged with its reason. It does not change what the restrictions or your consent conditions permit, so check those directly; it gives you fewer runs to account for and a record for each one.
Yes, with the EMS in charge. Left to themselves, solar inverters can push a lightly loaded generator below its minimum load or into reverse power, so many sites switch the solar off whenever the engine runs. EMS-CP limits solar output so the generator always stays above its minimum loading, and sends any surplus to the battery, so long outages burn less diesel instead of wasting the array.
A load setpoint. A generator controller that accepts a load setpoint is the single requirement that carries the most value on the prerequisites schedule — it is what makes reducing fuel within each hour possible, rather than only reducing hours.
Every run is recorded automatically. Recorded runtime and fuel data support right-sizing at the next replacement, and the monthly Diesel generator operations & fuel displacement report is part of the standard reporting suite.
The generator is called when the outage is set to outlast the battery, not when the battery is empty, and the reserve held back is a setting you own. How clean the handover is depends on the changeover switchgear: a plain transfer switch gives a brief interruption, and a site that cannot accept one needs static or paralleling gear specified up front.
Fewer outage starts do not remove the need for scheduled exercise runs, so keep your maintenance schedule. When the set does run, its output can recharge the battery, which gives it real load instead of idling, and those runs appear in the same log.
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Go deeper
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Add a battery and a controller to an existing generator set-up.
Where diesel, solar and storage meet.
The controller is half of it. The other half is the engineering that puts it on your site and keeps it right afterwards. Both are quoted as one item.
The product
1. The controller
Wired, configured and commissioned against your plant, and installed in the plant room. It is the component that operates the site.
2. The operator console
A single-line representation of the actual plant with live power on every feeder, the state of each source, the alarm register, and the endurance available at the load currently being carried.
3. The mobile view
Read-only, for management rather than operations: whether the site is sound, what it has saved, what has occurred and what is scheduled.
4. Reporting and training
The reporting suite, generated and distributed automatically, and instruction for the personnel who will operate the plant.
The service
The platform in full: specifications, the thirteen reports and implementation
Nothing bought yet? Better still: we write the equipment schedule so EMS-CP gets the data it needs from day one.
Missing one? It goes into the equipment schedule before anything is ordered, not discovered at commissioning.
Send us the items in what to send. We return a scope of supply, an equipment schedule and an indicative programme for EMS-CP, written against the outcomes you set.