As part of its U.S. Department of Energy SunShot Initiative Rooftop Solar Challenge  grant work, DOER hired The Cadmus Group to develop community shared solar guidance for Massachusetts communities (including residents, businesses, and municipal governments).

A Community Shared Solar (CSS) project is a solar photovoltaic (PV) system that provides benefits – such as electricity, net metering credits, and return on investment – to multiple participants. A CSS project is hosted by an entity with a suitable roof or parcel of land and is supported by multiple participants, who invest in the project or purchase the electricity or net metering credits generated. CSS offers an alternative for those who cannot install solar on their own property.

Community Shared Solar: Review and Recommendations for Massachusetts Models pdf format of Community Shared Solar Model Frameworks 032813
file size 1MB , March 2013. 
In this report, Cadmus identifies and assesses the opportunities and barriers of implementing CSS in Massachusetts. The report includes a review of existing CSS models being used across the country.

Community Shared Solar: Implementation Guidelines for Massachusetts Communities pdf format of Community Shared Solar Implementation Guidelines
file size 3MB , March 2013.
This comprehensive guide is intended as a resource for project organizers seeking to implement CSS projects in their community. The guide is designed to help Massachusetts’ private and public entities consider, plan, and implement CSS projects.