Retail Energy Costs and Where the Money Goes

If you run a retail shop in Ireland, energy is one of your biggest fixed costs — typically your third or fourth largest operating expense after rent, wages, and stock.

Yet most retailers have only a vague sense of what they spend on energy, and almost no idea where the money goes. “Electricity is expensive” is about as far as the analysis gets.

This guide breaks down retail energy costs, shows where the money actually goes, and identifies the changes that deliver the fastest return. If you’re looking to cut costs, this is where to start.

This guide covers energy costs broadly. For ventilation-specific topics in retail, see our separate guide on retail ventilation.

The Quick Version

• Irish retail shops typically spend €7,000–€10,000/year on energy
• Lighting: 40–50% of electricity — the single biggest cost and the easiest to fix
• Heating: 30–40% of total energy — often poorly controlled
• Equipment/other: 15–25% — refrigeration, POS, security, standby loads
• LED lighting with controls: 50–70% lighting savings, 12–18 month payback
• SEAI grants cover 30–50% of upgrade costs; ACA adds tax relief

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Where Retail Energy Spend Goes

Lighting (40–50% of electricity)

Lighting is the dominant cost in most retail environments. Shops need high light levels for product display, customer comfort, and creating the right ambience. But there’s an enormous difference between achieving those light levels with old technology vs new:

Lighting Type	Energy Use (per fitting)	Lifespan
T8 fluorescent tube	36–58W	10,000–15,000 hrs
T5 fluorescent tube	14–35W	20,000 hrs
Halogen spotlight	35–50W	2,000–4,000 hrs
LED tube	10–22W	50,000+ hrs
LED spotlight	6–12W	50,000+ hrs

A shop with 50 fluorescent fittings running 12 hours/day, 6 days/week could reduce its lighting electricity from €4,200/year to €1,400/year by switching to LED — a saving of €2,800/year.

The real win: intelligent controls. LED alone saves 50–60%. Adding controls saves a further 10–20%:

• Daylight dimming — lights near windows dim automatically when natural light is sufficient
• Occupancy sensors — back-of-house areas (stockrooms, toilets, offices) only lit when occupied
• DALI dimming — adjustable lighting scenes for different times of day or seasons
• Scheduled on/off — lights off automatically 30 minutes after closing

Heating (30–40% of total energy)

Heating in retail is complicated by one thing: the front door. Shops open and close their doors frequently (or keep them open in summer), creating constant heat loss.

Common heating waste in retail:

• Heating before opening and after closing. A shop that opens at 9am but heats from 6am loses three hours of heating into an empty building
• No weekend adjustment. Shops open shorter hours on Saturdays and closed Sundays, but heating runs on the weekday schedule
• Overheating. Staff standing still in a shop feel cold at 18°C, so the thermostat gets bumped to 23°C. But customers in winter coats feel warm at 18°C. Finding the right balance matters
• Entrance heat loss. An open door in winter can account for 30–40% of heating loss. Air curtains or fast-close doors significantly reduce this

Refrigeration (0–25% of electricity)

For convenience stores, food retail, and any shop with refrigerated display cases, refrigeration can be the single biggest electricity consumer — sometimes exceeding lighting.

Key considerations:

• Display case type matters enormously — glass-door cases use 30-50% less energy than open-fronted cases
• Night blinds on open cases reduce consumption overnight
• Defrost controls — timed defrost vs demand defrost makes a significant difference
• Compressor efficiency — modern inverter compressors use 20–30% less energy

Equipment and other (15–25%)

The remaining consumption covers:

• POS systems and computers
• Security systems (CCTV, alarms)
• Signage (illuminated signs, window displays)
• Staff areas (kettle, microwave, hot water)
• Standby loads overnight

The standby load is often underestimated. POS systems, display screens, computer equipment, and illuminated signage left on overnight can add €500–€1,500/year.

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The Quick Wins

Retail energy efficiency doesn’t require a complete building overhaul. These measures deliver the fastest payback:

1. LED lighting with controls (12–18 month payback)

This is the single best investment for most retail shops. The savings are large, the payback is short, and SEAI grants reduce the upfront cost further.

Typical project:

• Replace all fluorescent/halogen with LED
• Add occupancy sensors to stockroom, toilets, back office
• Add daylight sensors near windows
• Set up scheduled on/off to match trading hours

2. Heating controls optimisation (immediate–6 months payback)

Often achievable with the existing heating system:

• Set start/stop times to match trading hours (not earlier)
• Programme different schedules for weekdays, Saturdays, and Sundays
• Set reasonable temperature targets (19–20°C for retail)
• Install a programmable thermostat if you don’t have one (€200–€500)

3. Standby and overnight load reduction (immediate payback)

• Timer switches on non-essential equipment
• “Power down” procedure at close of business
• Individual switched sockets for equipment groups
• Turn off illuminated signage overnight (or reduce to security-only)

4. Draught-proofing and entrance management (6–18 months payback)

• Air curtains above entrance doors (€1,000–€3,000)
• Fast-close or automatic doors
• Draught seals on back doors and loading bays
• Lobby enclosure if layout permits

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Funding Your Improvements

The cost of retail energy upgrades is significantly reduced by available financial support:

Support	What It Covers	Benefit
SEAI SEUS grant	LED, controls, heating, insulation	30–50% of cost
Accelerated Capital Allowance	Qualifying energy-efficient equipment	100% year-one tax write-off
LEO grant	Energy improvements for micro-businesses	Up to 50% of cost

Combined example: A €10,000 LED lighting project with SEAI grant (40%) and ACA reduces the effective cost to approximately €4,500. With €3,000/year in savings, the payback drops to under 18 months.

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Next Steps

1. Add up your energy bills for the last 12 months — compare to the benchmarks above
2. Walk your shop after closing — what’s still on that shouldn’t be?
3. Book a commercial energy audit for a professional assessment of your specific savings opportunities
4. Read the SEAI grants guide to understand available funding
5. Check your overall energy costs against Irish SME benchmarks

Retail energy costs are highly addressable. Lighting alone — the biggest single cost — can be cut by 50–70% with a payback under two years. With grants covering up to half the cost, the business case is clear.

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Energy is one of the few retail costs where the savings opportunity is both large and achievable. Most shops can reduce energy costs by 20–30% with measures that pay for themselves within two years — and with SEAI support, the payback is even faster.