Solar companies climb on mild subsidy rules

** Shares of solar companies climb between 1% and 32% in after market trading

** The U.S. Treasury Department's changes on subsidy rules for solar and wind projects were "milder than what many in the wind and solar industries had feared" says Pavel Molchanov, analyst at Raymond James

** The U.S. Treasury Department on Friday unveiled new rules for how solar and wind projects can qualify for federal tax subsidies

** Under the new rules, utility-scale projects will require to show substantial and continuous physical work to be eligible for the credits

** Small projects of under 1.5 megawatts will still be able to use the 5% "safe harbor" provision

** SunRun RUN.O surges ~32%, SolarEdge Technologies SEDG.O rises 16.7% and Enphase Energy ENPH.O up 8.1%

** First Solar FSLR.O up 11%