Breton Technology (HKG:1333) entered into a 121.5 million yuan procurement contract with Guoxia Technology for energy storage system equipment, according to a Thursday Hong Kong bourse filing.

Shares of the firm were down over 4% in Friday mid-day trade.

The equipment is slated to be used in a photovoltaic-storage project serving the mining industry.

The deal covers battery containers, converters, transformers, monitoring systems, and related equipment, with delivery to take place at Shanghai Port or another designated port in China.

Payments will be made in stages, including a 10% as a quality assurance payment backed by a bank guarantee, the filing said.