The California Energy Commission is providing this guide as an information resource to those installing photovoltaic (PV) systems under the Emerging Renewable Buy down Program. This is the first published draft of this guide and represents the current state-of-the-art in PV system installation. Revisions will be made to the document as necessary to address suggestions made by users of the guide. If anyone has suggestions on how to make this guide more useful, please do not hesitate to send those suggestions to the California Energy Commission. We hope that this guide is a worthwhile addition to the resources available for installers and look forward to your constructive comments for continued improvements.