Smart energy monitoring and control for grocery & convenience stores
In a grocery store, refrigeration runs every hour of every day and is commonly 40 to 60% of the electricity bill. We make that energy visible circuit by circuit, optimise the refrigeration, and turn the same sensors into continuous HACCP cold-chain proof, with one monitoring and control stack.
Three forces converge on food retail
High prices, always-on refrigeration
Commercial electricity in Ireland is among the highest in the EU, and a grocery store's refrigeration runs 24/7/365 as the single largest load. There is no quiet period to soften a price rise, so energy is both a major cost and one of the few a store genuinely controls.
Margin squeeze across food retail
Convenience grocery runs on thin margins, with supplier, labour and occupancy costs all rising while customers resist higher shelf prices. With most costs fixed or climbing, controllable overheads like energy are where a store defends its margin without touching range or staffing.
Concentrated, addressable waste
Because refrigeration dominates the bill and runs on predictable rhythms, the savings are unusually concentrated and largely no- or low-capital. The SEAI supports that help fund the fix (microgeneration support tapering toward the end of the decade) are most valuable to stores that act sooner.
Three pillars: cost, continuity, compliance
Cost & margin
"In a grocery store, refrigeration is half the bill, and most of the waste is invisible."
Refrigeration is typically 40 to 60% of a grocery store's electricity, and the largest losses hide in plain sight: open cases spilling cold into the aisle all night, systems holding a higher condensing pressure than Ireland's cool climate needs, defrosts firing on a timer rather than on demand, and door-frame anti-sweat heaters running around the clock. None of it shows up on a monthly bill, which only ever reports a single number for the whole store.
The levers are well understood once the data is visible. Floating head pressure, demand defrost, anti-sweat-heater control and night blinds are largely no- or low-capital, and sub-metering visibility alone is worth around 10% before any control change. Refrigeration optimisation typically removes a further 10 to 20% of refrigeration energy, and layered with lighting and HVAC measures a full programme realistically targets 20 to 30% of total energy cost, recovered from a budget line that would otherwise only rise.
Stock protection & continuity
"A failed compressor overnight isn't a maintenance ticket, it's a skip full of spoiled stock."
The same monitoring that cuts cost also protects the stock on the shelves. A single overnight freezer or rack failure can write off thousands of euro, and under manual checks it is usually found hours later on the morning round. Continuous monitoring watches every unit between checks and raises an alert the moment temperature, door state or compressor behaviour drifts, so the failure is a notification to act on rather than a loss to absorb.
That early warning also extends equipment life and cuts emergency call-outs: a condenser that needs cleaning or a gasket that has worn shows up as rising energy and temperature before it fails outright, so maintenance becomes planned rather than reactive.
Food safety & compliance
"Evidence on a screen, not a clipboard nobody filled in."
Cold-chain temperature control is a food-safety obligation under HACCP, and today it usually rests on someone walking round with a probe two or three times a day. Continuous, time-stamped logging on every chiller, freezer and cold room turns that into an automatic record against FSAI limits, with alerts the moment a unit drifts out of range. It is an evidence trail you can show, rather than a routine you have to swear was followed, and it closes the six-to-ten-hour overnight gap that manual checks leave open.
It also frees staff time. Replacing the manual round saves well over an hour a day, and the same data underpins building risk more broadly: leak sensors in plant areas and cold rooms catch a burst or a running tap within minutes rather than on the next water bill, when the store is least watched.
A modular monitoring and control stack
Each capability is independently useful and independently funded. Most stores start with refrigeration monitoring and cold-chain assurance, the dominant load and the fastest food-safety win, then layer on refrigeration optimisation, HVAC and lighting control as savings prove out.
Refrigeration sub-metering & fault detection
A multi-channel current-monitoring hub with CT clamps in the distribution board breaks the bill down circuit by circuit: the refrigeration pack, lighting, HVAC, the bakery or deli and the three-phase mains, all on the same hub. Refrigeration is commonly 40 to 60% of a grocery store's electricity and runs around the clock, so it is both the biggest load and the biggest blind spot. Pressure sensors on the pack add suction and discharge data for fault detection and floating-pressure control. Sub-metering turns a single monthly number into 'this circuit is drawing more than it should,' which is where the waste actually sits, and visibility alone is associated with around 10% savings before any control change.
Cold-chain & HACCP temperature assurance
Air and probe temperature sensors in every chiller, freezer and cold room, plus door-contact sensors, log a continuous, time-stamped record against FSAI limits (chilled at or below 5°C, frozen at -18°C or colder). The same layer that protects food safety also exposes energy waste: short-cycling, overcooling, condensers that need cleaning and doors left open. Alerts fire the moment a unit drifts, so a failing compressor overnight is a phone notification rather than a morning of spoiled stock, and the digital log is an audit-ready evidence trail that replaces the manual round two or three times a day.
Refrigeration optimisation & control
Once the data is visible, the levers are well understood. Floating (optimised) head pressure lets the system run at the lowest safe condensing pressure for Ireland's cool maritime climate, worth roughly 1% for every degree the condensing temperature falls. Demand defrost replaces fixed timers so cabinets defrost only when they need to, and anti-sweat-heater control cycles the door-frame heaters on dew point instead of running them 24/7. Smart relays draw night blinds and apply overnight setback on open cases. Each measure is largely no- or low-capital, and refrigeration optimisation typically removes a further 10 to 20% of refrigeration energy on top of the visibility gain.
HVAC & demand-controlled ventilation
Zone temperature, humidity and CO₂ sensors drive the heating, cooling and ventilation off real conditions rather than a fixed schedule. Demand-controlled ventilation modulates fresh-air supply to actual occupancy instead of running flat out all day, optimal-start control pre-conditions the store before opening, and unoccupied setback trims the plant out of hours. Where the refrigeration pack rejects heat, that heat can be reclaimed for space heating and hot water rather than burnt for separately. Demand-controlled ventilation alone is cited at 10 to 30% of HVAC energy.
Lighting, occupancy & footfall
LED retrofits with occupancy and daylight control in stockrooms, cold rooms, staff areas and near the frontage cut lighting energy and stop lights burning in empty space, and LEDs add less waste heat for the refrigeration and cooling to remove. At the front of house, privacy-safe people counting (motion and radar only, no cameras or audio) relates energy and trade to customers served, so opening-hours plant can be tuned to actual footfall rather than habit.
One dashboard: Optim EOS
Everything above feeds the Optim EOS dashboard, hosted in Ireland, with role-scoped views: the store manager sees refrigeration status and any cold-chain alert, while the owner sees the energy and cost picture across the site. It ingests the wireless sensors over the store's gateway and integrates existing controllers without ripping anything out. The same data is the food-safety evidence trail and the measured baseline that proves each saving before the next phase of work is committed. One screen for the whole store, not a drawer of disconnected controllers.
When monitoring proves the case for capital
Night blinds and doors on open cases
Open multideck cases lose cold to the aisle continuously, and most of that loss overnight is pure waste. Night blinds are a low-capital measure with strong independent evidence behind them, keeping products in temperature for hours after they are reopened. Retrofitting doors onto open multidecks is a larger step the sub-metered baseline can justify case by case, sizing the upgrade on what each cabinet actually loses rather than a blanket spend.
Refrigeration heat recovery
A refrigeration pack rejects a large amount of heat that is usually thrown away to the outside air. An air-to-water or pack-integrated heat-recovery unit captures it for space heating and hot water, displacing gas or electric heating at the full commercial rate. Efficient stores meet most of their heat demand this way. A sub-metered baseline sizes the system on real rejected-heat data rather than guesswork.
Rooftop solar PV
A grocery store's daytime trading aligns well with solar generation, supporting a high self-consumption rate on an Irish roof. Where a store qualifies, the SEAI Non-Domestic Microgeneration Grant supports installing capacity, though that grant is tapering toward elimination later this decade, so the window to claim it is closing. The sub-metered baseline sizes the array against real daytime load, much of which is the refrigeration baseload.
Sector benchmarks and a modelled example
Grocery is an emerging vertical for monitoring, so the case rests on the mechanism and published sector evidence rather than a roster of named stores. The figures below are sector benchmarks and a modelled illustration, not Optim first-party results. The point of the audit and monitoring is to replace these ranges with your store's own measured numbers.
Refrigeration dominates the bill
Refrigeration is the single biggest energy user in a supermarket, commonly 40 to 60% of electricity consumption, and it runs 24/7/365. It is the largest controllable load and the prime target. Figures are sector benchmarks, not Optim first-party results.
Convenience formats run energy-intensive
Smaller and convenience-format stores show some of the highest energy intensities in food retail, with published electrical figures trending around 500 kWh/m²/yr and higher for the smallest formats, against roughly 250 to 400 kWh/m²/yr for larger, efficient stores. Energy per square metre is a useful first screen: well above ~450 kWh/m²/yr usually signals high savings headroom.
Irish electricity is among the most expensive in the EU
Eurostat placed Ireland's non-household electricity among the highest in the EU in late 2025 (around €0.2552/kWh), well above the EU average. Each avoided kilowatt-hour is therefore worth more here than in almost any other member state, which sharpens every refrigeration saving.
Optimisation and visibility effect
Refrigeration optimisation (floating head pressure, demand defrost, anti-sweat-heater control, night blinds and acting on monitoring insight) typically removes 10 to 20% of refrigeration energy, and sub-metering visibility alone is associated with around 10% before any control change.
Food safety pays as well as protects
Automated cold-chain monitoring removes the manual temperature round (well over an hour of staff time a day) and prevents overnight write-offs, with grocery refrigeration monitoring documented to save thousands of euro per store per year across spoilage, maintenance and labour combined.
Illustrative modelled store (~€200,000/yr energy)
Modelled on the benchmarks above, not a first-party result: a convenience grocery of this size models to roughly €40,000 to €60,000 a year of avoided energy waste at 20 to 30%, plus food-safety labour and avoided spoilage, against a modest wireless deployment with a simple payback typically well under two years. A store's own bills and meter data sharpen this either way, which is exactly what the audit and monitoring replace the model with.
Our four-step process
Free energy audit
A standalone deliverable: the store gets a professional audit report regardless of any next step. Where it qualifies, SEAI's €2,000 Support Scheme for Energy Audits voucher can cover the cost, we confirm eligibility upfront before any commitment.
Tailored design and quote
A hardware and software specification matched to your distribution board, your refrigeration pack and cabinets and the priorities the audit surfaces, not a one-size-fits-all kit. Sized for a single store or designed to extend across a group.
Installation around trading
Wireless, battery-powered devices retrofit with no rewiring and no structural work, and one gateway covers the whole store. The team works around your trading hours and deliveries, so the tills and the chillers keep running.
Continuous monitoring & support
Baseline, then quarterly reviews, optimisation and ongoing upgrades, with the platform, alerts and firmware managed remotely. The data forms the HACCP evidence trail and the measured baseline for the next phase, or the next store.
Where the money may come from
Eligibility for each scheme depends on the business's profile, the project scope and SEAI's current programme rules. We help assess fit and apply where appropriate, and we do not promise grants we cannot deliver.
SEAI Support Scheme for Energy Audits (SSEA)
€2,000 voucher that in most cases covers the cost of the audit where the business qualifies, and a store spending well over €10,000 a year on energy is comfortably eligible. Confirmed upfront, the zero-risk starting point.
Accelerated Capital Allowance (ACA)
100% first-year tax write-off on qualifying energy-efficient equipment (Optim EOS is on the SEAI Triple E register), against taxable trading profit, instead of the standard write-down over eight years. A strong cash-flow lever for a tax-paying store.
Local Enterprise Office Energy Efficiency Grant
75% of eligible costs, from a minimum of €750 up to a maximum of €10,000, toward energy meters and controls, LED, heat pumps and refrigeration upgrades. Open to small enterprises (1–50 employees) that have first completed a qualifying audit or Green for Business report, where eligible.
SEAI business energy upgrade supports
Capital support routes for automatic controls, building energy management, refrigeration, solar, heat pumps and fabric measures, including a BMS optimisation grant toward optimising an existing system that controls several services. Scope and rates depend on the current scheme rules and the project.
SEAI Non-Domestic Microgeneration Grant
Supports rooftop solar PV. Tapering annually toward elimination later this decade, so the value is highest for stores that act sooner.
SEAI EXEED Certified
Supports the engineering and project-management work on larger capital projects such as a refrigeration overhaul or a heat-recovery scheme.
Managed-service / pay-from-savings
Where a site is suitable, a managed-service structure may let a store spread cost against the savings generated rather than funding capital upfront, subject to assessment.
Grocery & convenience FAQ
Will installing this disrupt trading?
Refrigeration is our biggest cost. What can monitoring actually change?
Does this help with food safety and HACCP?
We have open multideck cases. Are night blinds and door retrofits worth it?
Does SEAI fund this? Which scheme fits a convenience store?
Is this extra work for our staff?
Can you really catch an overnight refrigeration failure before we lose stock?
The case for a more efficient store starts with a measured baseline.
Start with a free energy audit. The store gets a professional report regardless of any next step, and where it qualifies SEAI's €2,000 voucher can cover the cost.