** Energy storage systems maker ESS Tech's GWH.N shares
fall 19% to $7 after Oppenheimer downgrades rating to "perform"
from "outperform"
** "We are stepping to the sidelines looking for clarity on
capital structure and incremental consistency on delivery
schedules" - Oppenheimer analyst Colin Rusch
** But the brokerage says it sees significant need for
long-duration storage technologies and believes GWH will be a
long-term leader in the segment
** Two of 7 brokerages rate the stock "buy" and 5 "hold";
their median PT is $12.50 - LSEG data
** Up to last close, stock down 48% YTD
(Reporting by Anshuman Tripathy)
((Anshuman.Tripathy@thomsonreuters.com;))