** Solar panel maker First Solar's FSLR.O shares down ~12% to $120.83 premarket

** Company lowered its annual sales and profit forecasts on near-term tariff-related challenges and tepid residential solar demand in U.S.

** FSLR expects current-year net sales between $4.5 billion and $5.5 billion vs prior expectation range of $5.3 billion to $5.8 billion

** Forecasts 2025 earnings between $12.50/shr and $17.50/shr vs prior forecast range of $17/shr to $20/shr

** "Despite near-term tariff challenges, we believe the long-term outlook for solar demand, particularly in our core U.S. market, remains strong" - CEO Mark Widmar

** Brokerage Roth sees potential for stock to recover intraday as "the new guide appears to price in worst case scenarios"

** As of last close, company's shares down 26.4% YTD

(Reporting by Sumit Saha in Bengaluru)

((Sumit.Saha@thomsonreuters.com))