The California Solar Initiative's RD&D Program has now concluded after operating since 2008 through 2016. All solicitations and research projects are now complete.



 Program overview + Research briefs       

 [25 MB ]
 Program overview  [13 MB ]

 Research briefs  (high resolution)                     

 [44 MB ]

For more information on the research projects and resulting reports please review the section below. All completed final reports are also available separately for review and download. 

FINAL REPORTS for completed projects along with individual research briefs can be found here.


CSI RD&D Program - Program Evaluation 



 Report Summary       

 [277 KB ]
 Final Report  [3 MB ]


 [4 MB ]


Funded Projects

This is a database of projects funded by the CSI RD&D. The project summaries are listed alphabetically below. You may also choose a subset of projects by clicking a keyword, or using the search function.

Beopt-CA (EX): A Tool for Optimal Integration of EE/DR/ES+PV for California Homes

Current Highlights:

  • Final project webinar slide deck [PDF] and recording [wmv] - Mar 5, 2014

  • BEopt 2.2 release which includes the features funded by CSI RD&D Research

Project Information

Solicitation: Solicitation 1
Target Area: Cross-cutting Integration
Awardee: NREL (through Davis Energy Group)
CSI Funding: $985,000
Match Funding: $329,000
Start Date: January 2011
End Date: February 2014
Status: Complete

Contact Information

Principal Investigator Name: Craig Christensen, David Springer
Principal Investigator Email: craig.christensen @ nrel.gov, springer @ davisenergy.com
Principal Investigator Phone: 303-384-7510
Grant Manager Name: Smita Gupta
Grant Manager Email: smita.gupta @ itron.com
Grant Manager Phone: 509-891-3189

Project Summary

This NREL project targets the development of a software tool, BEopt-CA (Ex) (Building Energy Optimizer for California Existing Homes), that aims to facilitate balanced integration of energy efficiency (EE), demand response (DR), and energy storage (ES) with photovoltaics (PV) in the residential retrofit market. This software tool provides utility program managers and contractors in the EE/DR/PV market place with a means of balancing the integration of EE, DR, and ES with PV within the residential retrofit market. The project used PG&E and SunPower data to validate the prototypes developed in the modeling tool, using a statistical approach. Based on the variety of results obtained by examining different mixtures of EE/DR/ES/PV measures, the NREL team developed a recommended series of best practices for integrating PV with EE/DR and ES.

Deliverables and Documents


  • Final Project Report:   BEopt-CA (Ex): A Tool for Optimal Integration of EE, DR and PV in Existing California Homes. NREL for the CA Solar Initiative RDD&D Program. March 2014.  PDF (4 MB)


  • Initial Project Presentation. Jul 22, 2010. PDF (422 KB)

  • Cost Test inclusion presentation - Jan 2013 [ PDF ]

  • Final project webinar slide deck [PDF] and recording [wmv] - Mar 5, 2014

Project Activities

January 2011 Project started
January 2013 Webinar and meeting with utility stakeholders to demo the Utility Cost Test funcitonality added to BEoptCA

Project Links

  • BEopt 2.2 release which includes the features funded by CSI RD&D research

Tags: Energy Efficiency , Residential , Retrofit , ZNE