How a small business halved its energy consumption

The business realities of a remote location

Being in a relatively remote location, the 700 square metre Corryong IGA store has additional challenges, including managing energy usage at peak times.

“At around 4.00pm, the milking starts [at the farms in the area] and, on a very hot day, the lights begin to flicker,” laughs store Director Robyn McGowan.

Reliability is critical and, in a bid to improve it McGowan had a 110kva generator installed, along with a 29.76kw solar system with 93 panels on the roof.

Surprising energy consumers

Four years ago, taking up a government incentive, the store upped the ante again, calling in an energy auditor to assess the store’s energy usage and give them recommendations on how they could reduce it.

The primary users of energy in the store were the usual suspects: an ageing hot water system; the cool rooms and fridges for meat, dairy, deli and liquor; lighting; and the plant room that controls it all.

The audit drilled deeper to reveal that more than 50% of the store’s energy was being consumed by the doors of the freezers and fixed liquor refrigerators, with electrically heated frames to prevent condensation build up.

New heat seals were installed on the doors, linked to a timer sensor triggered by falling temperature to ensure condensation doesn’t build up. This method was 50% more energy efficient than the previous system.

Around 200 double fluoro tubes were replaced by more efficient LEDs, while two hot water systems – a 315-litre electric storage unit and a small under-bench electric unit – were replaced by a heat-pump hot water system.

The meat and deli cases were also replaced with more efficient units.

Positive impact

“It was really interesting,” says McGowan. “We’d never have thought about the heat seals and the hot water system being big energy consumers – it never have crossed our minds.”

With the changes, the energy saved could be used for air-conditioning during summer to keep the store nice and cool, and warm things up a little during winter.

Future focus

As a key service provider and a key employer in the town, the business must keep looking at ways to run more economically and efficiently.

Further energy savings may be possible by upgrading more equipment. “It’s the only logical step,” says McGowan. “However, there’s the outlay-to-benefit ratio to factor in.”

For Corryong IGA and many small businesses, cash flow is affected not just by energy consumption and costs, but by payment terms - longer payment terms can help a business manage cash flow in quieter periods in particular. 

But for a small, independent store on rented premises, the steps Corryong IGA has taken represent massive leaps in energy efficiency.