US investment giant BlackRock Inc (<a href="https://www.nyse.com/quote/XNYS:BLK" target="_blank">NYSE:BLK</a>) has agreed to pour USD 500 million (EUR 459.8m) to take a 20% stake in utility-scale solar and energy storage firm Recurrent Energy LLC, a unit of Canadian Solar Inc (<a href="https://www.nasdaq.com/market-activity/stocks/csiq" target="_blank">NASDAQ:CSIQ</a>).