The North American unit of French power utility Engie SA (<a href="https://live.euronext.com/en/product/equities/fr0010208488-xpar" target="_blank">EPA:ENGI</a>) has agreed to sell a stake in a 2.4-GW portfolio of battery energy storage assets in the US to an affiliate of US real estate investment firm CBRE Group Inc (<a href="https://www.nyse.com/quote/XNYS:CBRE" target="_blank">NYSE:CBRE</a>).