Wagga has become the first Dan Murphy's store in the state to install solar panels to help reduce its environmental footprint and cut energy costs.
The installation of a 94.36 kilowatt solar roof is made up of 337 high efficiency solar panels spanning around 550 square metres.
The solar system has the capacity to generate more than 140,000 kilowatt hours of electricity each year, which is the equivalent of 22 Australian households' annual energy consumption.
They will help offset approximately 40 per cent of the store's energy consumption.
Store manager Matthew Menser said the solar panels went live about two weeks ago and took about a week to install.
"It will make a big difference, we use an enormous amount of power with the fridges, lighting, air conditioning, heating and registers," he said.
"To lower all that impact will make a huge difference and with our fridge on 24-seven and in the summer it is so hot and they work overtime to get it cool and keep it cool.
"It's only a small part of the picture...but it will also help keep costs down so we can continue offering the best possible prices to our customers."
The Wagga store is the first out of 120 Woolworths Group sites that will draw from solar power across Australia by the end of 2019.