** Shares of solar company Sunrun RUN.O up nearly 5% at about $22 premarket

** BMO upgrades rating to "market perform" from "underperform", raises PT to $19 from $10

** New PT shows a 8.1% downside to the stock's last close

** Brokerage says RUN may reach a cash generation level in 2026 that allows it to consider share buybacks or starting a dividend, signaling stronger financial flexibility and potential returns to shareholders

** BMO remains cautious about the relevance of co's cash generation in supporting its current valuation, despite the rating change

** 14 of 26 brokerages rate the stock "buy" or higher, 12 "hold" ; their median PT is $19- data compiled by LSEG

** Stock up 123.6% YTD, as of last close

(Reporting by Apratim Sarkar in Bengaluru)

((Apratim.Sarkar@thomsonreuters.com))