The Maine Public Utilities Commission voted Wednesday to approve a $1.2 million taxpayer subsidy to an embattled biomass company operating two plants in West Enfield and Jonesboro. The vote by the three-member commission largely followed the recommendation of PUC staff, which found last month that Stored Solar LLC met only one of its three contract obligations while falling well short of the other two. It maintained the agreed upon number of jobs but purchased less than 40 percent of the waste wood it promised and spent $1 million less on capital expenditures than it was supposed to. Some lawmakers said the $1.2 million subsidy should be reduced further based on that performance.