Announced on Tuesday, Coles will partner in the roll-out of three Riverina solar farms, including the $29 million establishment on Old Sydney Road, Marinna.

Combined with the Windmill Road, Bomen project in Wagga and a separate venture in Corowa, the new farms are expected to generate 240 construction jobs, and 10 ongoing positions.

Coles has described the deal as the "first major Australian retailer to commit to buying renewable energy through a Power Purchase Agreement".

The supermarket will purchase 70 per cent of the farms' output which will be used to supply 10 per cent of its national power demand.

Placing his overall reservations on solar farms to one side, Junee Shire mayor Neil Smith has applauded the recent developments.

"I am pleased to see Australia moving towards a more sustainable future with its energy," Mayor Smith said.

"I had held very strong beliefs against solar farms gobbling up prime agricultural land, but in some places where the land is more marginal, a solar farm can bolster the income of the property owner."

Junee Council general manager James Davis further re-iterated the sentiment, expressing pride in the fact that the town has been chosen for such a large venture.

"This region has an abundance of excellent solar resources and establish electricity infrastructure that makes investment in large scale solar development very attractive," he said.

"While the regional economy benefits from investment of this type it is important that good site selection for large scale solar farms is also achieved to ensure that our highly productive agriculture land is retained for food and fibre production.

"There's room for both economic activities, the key is getting the location right."

Construction will begin next month and will be completed by July next year.

"If this [agreement] gives developers assurance that it's definitely going to go ahead, that can only be a good thing," Mayor Smith said.

The Wagga and Junee projects, which were originally proposed by Terrain Solar, will now be built and operated by UK-based firm Metka EGN.

The firm is owned by energy and metal manufacturing Greek company Mytilineos Holdings.