Several Analyst rating notes this morning.  Hat tip to Street Insider for the analyst commentary.

Soleil Securities maintains Hold on SunPower (SPWRA) and has price target of $21.  “Cutting 2010 estimate from $1.50 to $1.30 per share (consensus is $1.45 per share). Introducing below consensus estimate for 2011 ($1.65 per share vs. $2.07 consensus).”

Merriman Curhan Ford reiterates Buy rating on Power One (PWER).  “Our recent meeting with senior management continues to reaffirm our bullish stance on both the secular growth story for inverters and Power-One’s turnaround story with continued margin leverage.”

Wedbush initiates coverage on some water plays.  Nalco (NLC) and Pentair (PNR) get Outperform ratings, Calgon Carbon (CCC) Neutral and Energy Recovery (ERII) initiated at Underperform.   “Our two top picks are Nalco and Pentair: We believe the NLC’s unique position in the water sector, strong free cash flow and high margins make these shares attractive. Importantly, we see significant earnings growth in both the near and long-term through product innovations and a reduced cost structure. Meanwhile, PNR’s new initiatives in water reuse coupled with international sales growth are positioning the company for returned to 6%-8% sales growth while PNR experiences meaningful operating leverage from restructurings in 2009.”