By Dominique Vidalon

PARIS, June 7 (Reuters) - French retailer Casino has received three preliminary offers for its renewable-energy business GreenYellow, with bids around 1.5 billion euros ($1.60 billion) each, two sources with knowledge of the matter said on Tuesday.

Macquarie I Squared Capital and Dutch company SHV had made preliminary offers as of June 2, one source said, adding that other potential bidders had asked for Online Casino more time to put together a possible offer.

A second source said the three preliminary offers were likely to be "interesting" for Online Casino, Online Casino adding that formal offers could be made before end-July.

BFM TV earlier on Tuesday said GreenYellow had not attracted much interest from potential buyers in the French energy sector, hitting Casino shares in early trade.

They closed down 4.1% at 17.11 euros, having fallen as much as 6% earlier in the day.

Macquarie, I Squared Capital and SHV could not be immediately reached for comment.

Casino, which has embarked on a plan to sell non-core assets to cut debt, said last month that it had launched a process to sell GreenYellow, aiming to seal a potential deal by the end of the year.