** Solar inverter maker Enphase Energy ENPH.O shares surge 3.4% ahead of qtrly results after the bell, with investors focused on robust demand and revenue growth

** Analysts expect Q1 rev up 37% to $360.9 mln, with adjusted EPS seen at $0.70 vs $0.35 yr-ago, per LSEG

** On February 4, co forecast Q1 rev in range of $340 mln - $380 mln, above analyst estimates

** ENPH recently at 15 times expected earnings, suggesting it might be undervalued compared to its avg forward PE of 45 over past five years, per LSEG data

** The co's stock has sunk about 22% YTD, underperforming the Nasdaq .IXIC, which fell 15% in the same period

** Stock is about 62% below its 52-week intraday high of $141.63 reached on Jun. 12, 2024, indicating significant room for recovery

(Reporting by Noel Randewich)

((noel.randewich@thomsonreuters.com))