The Griffith North Woolworths has installed 621 "high efficiency" solar panels along its roof, establishing a system able to generate more than 320 megawatt hours of electricity each year.

The panels are expected to offset 18 per cent of the store's energy consumption, a percentage which store manager Jenny Worthington says is far from insignificant.

"From store lighting and air-conditioning to food refrigeration and preparation, there is no doubt supermarkets are energy intensive to run," Ms Worthington said.

"In recent years we've been working to run our stores more sustainably, and energy use is a big part of the effort."

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According to Ms Worthington, in addition to harnessing the power of renewables, the Woolworths store has also invested in more efficient refrigeration and lighting systems.

"We're pleased to be doing our bit for the planet with this solar installation," the store manager said.

Energy expert and Australian coordinator of the RE100 renewable energy initiative Jon Dee said by rolling out the solar panels, Griffith's Woolworths store is setting an example for other businesses to follow.

Woolworths stores make up for one per cent of total energy consumption across Australia, and the company has vowed to make all that energy come from renewable sources by 2025.

"It's wonderful to see Woolworths Griffith North helping to bring about that national change," Mr Dee said.

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