Battery first · solar used · the DG last

One Energy System for Commercial Buildings

Offices, colleges, malls and government buildings already pay for a supply, a backup and often rooftop solar. Ingro EMS-CB runs the battery, solar, the generator, the meters and the BMS as one system, so the building stays on through every interruption and its bill comes down between them.

An office building run as one energy system: rooftop solar on the podium, the supply meter, a row of battery cabinets, an optional diesel generator and the Ingro EMS cabinet wired to all of them. Cards note that solar is used in the building first, the supply is kept under its demand limit, the meters and the building management system are read in one view, and the battery takes the building the instant supply fails, with the generator starting only if the outage outlasts it.kVADGIngro EMS-CB
Overview

A Building Pays for Its Energy Twice

Once for continuity that sits idle between outages, and again for a bill set by time-of-day rates and its highest demand. One controller can make the same equipment do both jobs.

Continuity that earns nothing

Lifts, laboratories, lighting and servers cannot drop when supply is interrupted. Today that protection is a cost that sits idle between events and earns nothing.

A bill with two parts that matter

The building pays time-of-day rates and a demand charge set by the highest demand its meter records. A battery that is already there for backup can work both, above a reserve it never touches.

The short answer

What does an energy management system do in a commercial building?

It decides, moment to moment, which source carries the building's load: rooftop solar, the battery, the supply or a generator. Ingro EMS-CB keeps the building on line through supply failures, uses solar in the building first, works the battery against the tariff and the demand limit, and reads every meter and the building management system as it goes.

Where Ingro fits

  • Ingro EMS-CB on site: the control loop keeps running without internet
  • Battery first through an outage; a generator, if fitted, only if it must
  • Rooftop solar, meters and the BMS in the same order of preference
  • Any battery, inverter and DG make; the EMS alone or turnkey
What we install here

Ingro EMS-CB: Offices & commercial buildings

Ingro EMS-CB is an energy management system for occupied commercial buildings. It runs the battery, the incoming supply and, where the building has them, rooftop solar and a diesel generator as one system, reading every meter and the building management system as it goes.

Runs at: Office · Government office · School · College · Mall · Hotel · Housing society

  • Battery first, generator last
  • Rooftop solar used in the building
  • Meters and BMS in one view

Battery + supply · with or without solar and a generator

The problem

The Parts Are There. No One Is in Charge.

Most buildings already own the equipment. What they lack is one controller deciding which part carries the load.

01

Backup sits idle

Storage held only for outages earns nothing between them, while the building keeps paying peak rates and its demand charge.

02

The generator starts for every blip

Without a battery in front of it, every supply interruption starts the engine, however short: fuel, run hours and maintenance for a few minutes of cover.

03

Solar exported cheap, peak bought dear

Midday surplus from the roof leaves at the feed-in rate, and the evening peak is bought back at the peak tariff.

04

The BMS works alone

Cooling, pumps and lighting run to their own schedules, blind to the tariff window and to the demand limit the building is billed on.

How it runs

How the Building Runs Through the Day

Pick a moment. The parts lit green are carrying the building.

  • Rooftop solarWorking
  • BatteryWorking
  • The supplyWorking
  • GeneratorStanding by
  • BMS loadsStanding by
  • Ingro EMS-CBWorking

Solar serves the building first

Rooftop solar carries as much of the building as it can. Its surplus charges the battery instead of leaving at the feed-in rate, and the supply carries only the balance.

One battery, two jobs

A Reserve for Outages, a Band That Earns

The split is a setting on the same hardware, not two batteries.

Below the floor

The reserve

  • Held apart from commercial operation for continuity
  • Minutes for a changeover, or hours of autonomous running
  • Untouched until the next interruption
Above the floor

The working band

  • Charged in low-tariff windows, spent in peak ones
  • Holds demand below the building's ceiling
  • Stores rooftop solar for the evening

The reserve floor is revised as the building accumulates its own data. Equipment that cannot tolerate any break keeps its own UPS, with the battery carrying the building behind it.

Kinds of site

One Controller, Every Kind of Building

The hardware is the same in each. What differs is the size of the reserve and whether solar or a generator is present, which are settings.

Owners and facility managers

Offices and corporate campuses

Lifts, servers and lighting through every interruption, and a demand charge set by the working day.

The EMS: A reserve sized to a changeover; the rest of the battery works the tariff.

EMS-CB
Departments and public works

Government offices

Buildings that must stay open whatever the supply does.

The EMS: A larger reserve held back for continuity, on the same controller.

EMS-CB
Campuses and universities

Schools and colleges

Laboratories and lighting through the day, and roofs that suit solar.

The EMS: Rooftop solar used on campus first, its surplus stored for the evening.

EMS-CB
Retail and hospitality

Malls and hotels

Long hours and heavy cooling, with a peak that meets the costliest tariff window.

The EMS: Demand held below its ceiling, and flexible cooling loads moved out of the peak through the BMS.

EMS-CB
Societies with common services

Housing societies

Lifts, pumps and common lighting, often with rooftop solar on the blocks.

The EMS: Solar stored instead of exported, and common services carried through an outage.

EMS-CB
Sites where nothing may drop

Hospitals and airports

Critical sites are run on the critical power package, with the generator sequenced behind the battery.

The EMS: Battery takes every outage first; the engine starts only if it must.

EMS-CP: critical power
More than the battery

What EMS-CB Reads and Talks To

Battery + supply · with or without solar and a generator. Integration is confirmed against your equipment list during discovery.

Energy meters

The incoming revenue meter and sub-meters on feeders, tenants and large loads, read every cycle, so control and the bill work from the same numbers.

Building management system

Read over Modbus or OPC-UA, or through a gateway. Where you allow it, flexible loads such as pre-cooling and pumps are moved out of peak windows.

Battery BMS and PCS

Cell limits, state of charge and state of health read every cycle, and the power conversion system dispatched inside them.

Solar inverters

Any make that accepts a remote active-power limit, over Modbus or SunSpec, so solar is held back only when it has to be.

Generator controller

Start authority and a load setpoint on the DG controller or AMF panel, with warm-up, cool-down and minimum load held as hard limits.

Breakers and protection

Changeover switches, feeder breakers and relays through digital I/O and dry contacts, for transfer and for dropping nominated circuits.

Product + service

From Your Site to a Plant in Service

Ingro scopes, models, commissions and supports the system, or supplies the EMS to the EPC building yours.

  1. 1

    The site is established

    What exists, what has been ordered, and the outcomes the plant is required to deliver. One schedule and one conversation.

  2. 2

    The equipment schedule is issued

    Written against those outcomes, so that the plant is capable of what has been asked of it.

  3. 3

    The plant is modelled

    Your asset counts, loads, tariff and load profile are run against a full simulation of the site before equipment ships, including adverse conditions. Behaviour is reviewed and revised at this stage.

  4. 4

    The plant is commissioned

    Wired, configured and tested against the site's own values, with the results recorded.

  5. 5

    The plant is handed over and supported

    Personnel trained, the reporting suite in service, and a defined route for support thereafter.

FAQ

Building Energy, Answered

8 questions

It decides, moment to moment, which source carries the building's load: rooftop solar, the battery, the supply or a generator. Ingro EMS-CB keeps the building on line through supply failures, uses solar in the building first, works the battery against the tariff and the demand limit, and reads every meter and the building management system as it goes.

Yes. Both are options on the same controller. Solar serves the building first and charges the battery with its surplus. The generator is the last line: it starts only when an outage outlasts the battery and, while it runs, is held inside its efficient loading band and tops the battery up. A building with neither runs the battery and the supply alone.

Yes, and the split is explicit. Capacity above the reserve floor works the tariff — charging in low-tariff windows, discharging in peak ones, holding demand below its ceiling. Capacity below the floor is untouched by commercial operation and is there for the next interruption.

Offices, government buildings, schools, colleges, malls, hotels and retail. The hardware is the same in each; what differs is the size of the reserve and whether solar or a generator is present, which are settings. Hospitals, airports and data centres, where nothing may drop, are critical sites run on EMS-CP.

As much as you configure. The reserve floor is the proportion of usable battery capacity held apart from commercial operation for continuity — minutes for a changeover in an office, or hours of autonomous running in a building that must stay open. It is a setting on the same hardware, revised as the building accumulates its own data.

Yes. The incoming meter and the sub-meters on feeders, tenants and large loads are read every cycle, and the building management system is read over Modbus or OPC-UA, or through a gateway. Where you grant it, the EMS also moves flexible loads such as pre-cooling and pumps out of peak windows. Integration is confirmed against your equipment list during discovery.

It depends on the class of changeover your process requires. EMS-CB assumes the load at the instant supply is lost, which covers most building loads; equipment that cannot tolerate any break at all is still served by its own UPS, with the battery carrying the building behind it.

A stability hold precedes resynchronisation, after which the building's load is transferred back automatically or on operator confirmation, according to the reconnection policy you configure.

Still have a question?

Send us your site, hardware and tariff or tender, and an engineer will answer it.

Run Your Building's Energy as One System

Send a recent bill and your equipment list: the battery, solar, generator and BMS you have or plan. We will scope EMS-CB against them.

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