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Download New Solar Homes Partnership Calculator

image of nshp calculator logo seen on Windows desktop

CECPV Calculator Versions 4.1 and 5.0
Updated: March 14, 2014

This is a detailed hourly calculation tool based on the 5-parameter model developed by the Solar Energy Laboratory at the University of Wisconsin. The CECPV Calculator incorporates detailed inverter performance modeling and uses weather data from the 16 climate zones in California (as used by the Title 24 compliance calculations).

The MS Excel interface to the calculation engine is provided by the Energy Commission for download and allows the user to select PV modules and inverters from a library of eligible equipment. Please check this website periodically for updates as new equipment may be added to the NSHP eligibility lists. The CECPV Calculator generates the estimated monthly kWh production and annual TDV (kWh) production for the specified system. It also determines the appropriate incentive amount as calculated by the Expected Performance Based Incentive approach outlined in the NSHP Guidebook.

Note: To qualify for an incentive, residential buildings must receive electricity distribution service at the site of installation from one of four investor-owned utilities (IOUs) in California. The IOUs are: Pacific Gas & Electric Company, Southern California Edison Company, San Diego Gas & Electric Company, and Southern California Water Company - doing business as Bear Valley Electric Service. On the list within the calculator, there are cities that are not served by the above utilities. You can determine what utility serves your project by going to the page called Finding Your Utility Company.

Download the module/inverter update for the CECPV Calculator Version 5.0

new  Module/Inverter Update Automated Installation
(Updated 03/14/2014)
(MSI file, 1305 kilobytes) Internet Explorer Users: Left-Click the Link to download. Choose "Open" or "Run" at the first prompt. If you receive a security warning, choose "Run" or "OK." The program will be automatically installed in the C:\CECPV50 directory. If you require a different directory, please use a manual installation with the zip file below.

Mozilla Firefox Users: Left-Click the Link to download. Choose "Save File" at the first prompt. Once the download completes, double-click the file. The file may be located in either the Firefox "Downloads" window or at your computer's default save location (often the desktop). If you receive a "Open Executable File?" prompt, choose "OK". The program will be automatically installed in the C:\CECPV50 directory. If you require a different directory, please use a manual installation with the zip file below.

new  Module/Inverter Update Manual Installation
(Updated 03/14/2014)
(ZIP file, 1068 kilobytes) Left-Click the Link to download. Choose "Save" to store the file on your hard disk. Un-zip to C:\ to install in C:\CECPV50 directory.


Download the module/inverter update for the CECPV Calculator Version 4.1

new  Module/Inverter Update Automated Installation
(Updated 03/14/2014)
(MSI file, 1305 kilobytes) Internet Explorer Users: Left-Click the Link to download. Choose "Open" or "Run" at the first prompt. If you receive a security warning, choose "Run" or "OK." The program will be automatically installed in the C:\CECPV41 directory. If you require a different directory, please use a manual installation with the zip file below.

Mozilla Firefox Users: Left-Click the Link to download. Choose "Save File" at the first prompt. Once the download completes, double-click the file. The file may be located in either the Firefox "Downloads" window or at your computer's default save location (often the desktop). If you receive a "Open Executable File?" prompt, choose "OK". The program will be automatically installed in the C:\CECPV41 directory. If you require a different directory, please use a manual installation with the zip file below.

new  Module/Inverter Update Manual Installation
(Updated 03/14/2014)
(ZIP file, 1068 kilobytes) Left-Click the Link to download. Choose "Save" to store the file on your hard disk. Un-zip to C:\ to install in C:\CECPV41 directory.




Download the Energy Commission CECPV Calculator Version 5.0

The CECPV Calculator Version 5.0 can only be used for NSHP projects complying with the 2013 update of the California Building Energy Efficiency Standards.

Version 5.0 Automated Installation
(MSI file, 8.1 megabytes) Internet Explorer Users: Left-Click the Link to download. Choose "Open" or "Run" at the first prompt. If you receive a security warning, choose "Run" or "OK." The program will be automatically installed in the C:\CECPV5x directory, where x is the version number. If you require a different directory, please use a manual installation with the zip file below.

Mozilla Firefox Users: Left-Click the Link to download. Choose "Save File" at the first prompt. Once the download completes, double-click the file. The file may be located in either the Firefox "Downloads" window or at your computer's default save location (often the desktop). If you receive a "Open Executable File?" prompt, choose "OK". The program will be automatically installed in the C:\CECPV5x directory, where x is the version number. If you require a different directory, please use a manual installation with the zip file below.

Version 5.0 Manual Installation
(ZIP file, 7.7 megabytes) Left-Click the Link to download. Choose "Save" to store the file on your hard disk. Un-zip to C:\ to install in C:\CECPV5x directory, where x is the version number.

Version Change Details
(Acrobat file, 61 kilobytes)




Download the Energy Commission CECPV Calculator Version 4.1

The CECPV Calculator Version 4.1 can only be used for NSHP projects complying with the 2008 or 2005 updates of the California Building Energy Efficiency Standards.

Version 4.1 Automated Installation
(MSI file, 8.5 megabytes) Internet Explorer Users: Left-Click the Link to download. Choose "Open" or "Run" at the first prompt. If you receive a security warning, choose "Run" or "OK." The program will be automatically installed in the C:\CECPV4x directory, where x is the version number. If you require a different directory, please use a manual installation with the zip file below.

Mozilla Firefox Users: Left-Click the Link to download. Choose "Save File" at the first prompt. Once the download completes, double-click the file. The file may be located in either the Firefox "Downloads" window or at your computer's default save location (often the desktop). If you receive a "Open Executable File?" prompt, choose "OK". The program will be automatically installed in the C:\CECPV4x directory, where x is the version number. If you require a different directory, please use a manual installation with the zip file below.

Version 4.1 Manual Installation
(ZIP file, 8.1 megabytes) Left-Click the Link to download. Choose "Save" to store the file on your hard disk. Un-zip to C:\ to install in C:\CECPV4x directory, where x is the version number.

Version Change Details
(Acrobat file, 19 kilobytes)


Calculator Support


NSHP applications must use a version of the NSHP CECPV Calculator that is listed as "certified" on the date the NSHP application is postmarked (or date of submission for electronic NSHP applications).

Version NumberRelease DateLibrariesDecertified DateCurrently Certified Code Compliant Tier $/Watt Market Rate Tier I $/WattMarket Rate Tier II $/WattSolar as a StandardAffordable Housing Dwelling Unit $/WattAffordable Housing Common Area $/Watt
v5.0 Update 1March 14, 2014Mod5.0b/Inv5.0bNone ScheduledYes$1.00/watt$1.20/watt$1.75/wattN/A$2.20/wattN/A
v5.0January 23, 2014Mod5.0a/Inv5.0aNone ScheduledYes$1.00/watt$1.25/watt$1.75/wattN/A$2.20/wattN/A
v4.1 Update 1March 14, 2014Mod4.1b/Inv4.1bNone ScheduledYesN/A$1.20/watt$1.50/wattN/A$2.20/wattN/A
v4.1January 23, 2014Mod4.1a/Inv4.1aNone ScheduledYesN/A$1.25/watt$1.50/wattN/A$2.20/wattN/A
v4.0 Update 3December 6, 2013Mod4.0d/Inv4.0dJanuary 28, 2014NoN/A$1.25/watt$1.50/wattN/A$2.20/wattN/A
v4.0 Update 2October 7, 2013Mod4.0c/Inv4.0cJanuary 28, 2014NoN/A$1.25/watt$1.50/wattN/A$2.20/wattN/A
v4.0 Update 1June 19, 2013Mod4.0b/Inv4.0bJanuary 28, 2014NoN/A$1.50/watt$1.75/wattN/A$2.20/wattN/A
v4.0 April 19, 2013Mod4.0a/Inv4.0aJanuary 28, 2014NoN/A$1.50/watt$1.75/wattN/A$2.20/wattN/A
v3.1 Update 1January 22, 2013Mod3.1b/Inv3.1bApril 19, 2013NoN/A$1.75/watt$2.00/wattN/A$2.55/wattN/A
v3.1October 2, 2012Mod3.1a/Inv3.1aApril 19, 2013NoN/A$1.75/watt$2.00/wattN/A$2.55/wattN/A
v3.0 Update 3September 1, 2012Mod3.0d/Inv3.0dOctober 2, 2012NoN/A$2.00/watt$2.25/wattN/A$2.90/wattN/A
v3.0 Update 2July 17, 2012Mod3.0c/Inv3.0cOctober 2, 2012NoN/A$2.00/watt$2.25/wattN/A$2.90/wattN/A
v3.0 Update 1May 23, 2012Mod3.0b/Inv3.0bOctober 2, 2012NoN/A$2.00/watt$2.25/wattN/A$2.90/wattN/A
v3.0January 12, 2012Mod3.0a/Inv3.0aOctober 2, 2012NoN/A$2.00/watt$2.25/wattN/A$2.90/wattN/A
v2.6 Update 4January 10, 2012Mod2.6e/Inv2.6eJanuary 12, 2012NoN/A$2.25/wattN/A$2.35/watt$3.15/watt$2.97/watt
v2.6 Update 3December 2, 2011Mod2.6d/Inv2.6dJanuary 12, 2012NoN/A$2.25/wattN/A$2.35/watt$3.15/watt$2.97/watt
v2.6 Update 2November 7, 2011Mod2.6c/Inv2.6cJanuary 12, 2012NoN/A$2.25/wattN/A$2.35/watt$3.15/watt$2.97/watt
v2.6 Update 1October 10, 2011Mod2.6b/Inv2.6bJanuary 12, 2012NoN/A$2.25/wattN/A$2.35/watt$3.15/watt$2.97/watt
v2.6August, 12 2011Mod2.6a/Inv2.6aJanuary 12, 2012NoN/A$2.25/wattN/A$2.35/watt$3.15/watt$2.97/watt
v2.5 Update 2August 10, 2011Mod2.5c/Inv2.5cSeptember, 11 2011NoN/A$2.50/wattN/A$2.60/watt$3.50/watt$3.30/watt
v2.5 Update 1June 22, 2011Mod2.5b/Inv2.5bSeptember, 11 2011NoN/A$2.50/wattN/A$2.60/watt$3.50/watt$3.30/watt
v2.5May 16, 2011Mod2.5a/Inv2.5aSeptember, 11 2011NoN/A$2.50/wattN/A$2.60/watt$3.50/watt$3.30/watt
v2.4 Update9November 15, 2010Mod2.4j/Inv2.4jSeptember, 11 2011NoN/A$2.50/wattN/A$2.60/watt$3.50/watt$3.30/watt
v2.4 Update8October 12, 2010Mod2.4i/Inv2.4iSeptember, 11 2011NoN/A$2.50/wattN/A$2.60/watt$3.50/watt$3.30/watt
v2.4 Update7September 9, 2010Mod2.4h/Inv2.4hSeptember, 11 2011NoN/A$2.50/wattN/A$2.60/watt$3.50/watt$3.30/watt
v2.4 Update6August 17, 2010Mod2.4g/Inv2.4gSeptember, 11 2011NoN/A$2.50/wattN/A$2.60/watt$3.50/watt$3.30/watt
v2.4 Update5July 15, 2010Mod2.4f/Inv2.4fSeptember, 11 2011NoN/A$2.50/wattN/A$2.60/watt$3.50/watt$3.30/watt
v2.4 Update4June 17, 2010Mod2.4e/Inv2.4eSeptember, 11 2011NoN/A$2.50/wattN/A$2.60/watt$3.50/watt$3.30/watt
v2.4 Update3April 21, 2010Mod2.4d/Inv2.4 dSeptember, 11 2011NoN/A$2.50/wattN/A$2.60/watt$3.50/watt$3.30/watt
v2.4 Update2March 15, 2010Mod2.4c/Inv2.4cSeptember, 11 2011NoN/A$2.50/wattN/A$2.60/watt$3.50/watt$3.30/watt
v2.4 Update1February 24, 2010Mod2.4b/Inv2.4bSeptember, 11 2011NoN/A$2.50/wattN/A$2.60/watt$3.50/watt$3.30/watt
v2.4January 29, 2010Mod2.4a/Inv2.4aSeptember, 11 2011NoN/A$2.50/wattN/A$2.60/watt$3.50/watt$3.30/watt
v2.3 Update 16January 12, 2010Mod2.3q/Inv2.3pMarch 1, 2010NoN/A$2.50/wattN/A$2.60/watt$3.50/watt$3.30/watt
v2.3 Update 15October 27, 2009Mod2.3p/Inv2.3oMarch 1, 2010NoN/A$2.50/wattN/A$2.60/watt$3.50/watt$3.30/watt
v2.3 Update 14October 15, 2009Mod2.3o/Inv2.3nMarch 1, 2010NoN/A$2.50/wattN/A$2.60/watt$3.50/watt$3.30/watt
v2.3 Update 13September 8, 2009Mod2.3n/Inv2.3mMarch 1, 2010NoN/A$2.50/wattN/A$2.60/watt$3.50/watt$3.30/watt
v2.3 Update 12July 16, 2009Mod2.3m/Inv2.3lMarch 1, 2010NoN/A$2.50/wattN/A$2.60/watt$3.50/watt$3.30/watt
v2.3 Update 11May 11, 2009Mod2.3l/Inv2.3kMarch 1, 2010NoN/A$2.50/wattN/A$2.60/watt$3.50/watt$3.30/watt
v2.3 Update 10March 11, 2009Mod2.3k/Inv2.3jMarch 1, 2010NoN/A$2.50/wattN/A$2.60/watt$3.50/watt$3.30/watt
v2.3 Update 9February 11, 2009Mod2.3j/Inv2.3iMarch 1, 2010NoN/A$2.50/wattN/A$2.60/watt$3.50/watt$3.30/watt
v2.3 Update 8December 11, 2008Mod2.3i/Inv2.3hMarch 1, 2010NoN/A$2.50/wattN/A$2.60/watt$3.50/watt$3.30/watt
v2.3 Update 7October 23, 2008Mod2.3h/Inv2.3gMarch 1, 2010NoN/A$2.50/wattN/A$2.60/watt$3.50/watt$3.30/watt
v2.3 Update 6September 9, 2008Mod2.3g/Inv2.3fMarch 1, 2010NoN/A$2.50/wattN/A$2.60/watt$3.50/watt$3.30/watt
v2.3 Update 5June 3, 2008Mod2.3f/Inv2.3eMarch 1, 2010NoN/A$2.50/wattN/A$2.60/watt$3.50/watt$3.30/watt
v2.3 Update 4April 30, 2008Mod2.3e/Inv2.3dMarch 1, 2010NoN/A$2.50/wattN/A$2.60/watt$3.50/watt$3.30/watt
v2.3 Update 3April 4, 2008Mod2.3d/Inv2.3cJune 1, 2008NoN/A$2.50/wattN/A$2.60/watt$3.50/watt$3.30/watt
v2.3 Update 2March 20, 2008Mod2.3c/Inv2.3cJune 1, 2008NoN/A$2.50/wattN/A$2.60/watt$3.50/watt$3.30/watt
v2.3 Update 1January 18, 2008Mod2.3b/Inv2.3bJune 1, 2008NoN/A$2.50/wattN/A$2.60/watt$3.50/watt$3.30/watt
v2.3December 6, 2007Mod2.3a/Inv2.3aJune 1, 2008NoN/A$2.50/wattN/A$2.60/watt$3.50/watt$3.30/watt
v2.2 Update 1December 6, 2007Mod2.2b/Inv2.2bJanuary 7, 2008NoN/A$2.50/wattN/A$2.60/watt$3.50/watt$3.30/watt
v2.2October 22, 2007Mod2.2a/Inv2.2aJanuary 7, 2008NoN/A$2.50/wattN/A$2.60/watt$3.50/watt$3.30/watt
v2.1 Update 3December 6, 2007Mod2.1d/Inv2.1dJanuary 7, 2008NoN/A$2.50/wattN/A$2.60/watt$3.50/watt$3.30/watt
v2.1 Update 2September 7, 2007Mod2.1c/Inv2.1cJanuary 7, 2008NoN/A$2.50/wattN/A$2.60/watt$3.50/watt$3.30/watt
v2.1 Update 1August 24, 2007Mod2.1b/Inv2.1bJanuary 7, 2008NoN/A$2.50/wattN/A$2.60/watt$3.50/watt$3.30/watt
v2.1July 30, 2007Mod2.1a/Inv2.1aJanuary 7, 2008NoN/A$2.50/wattN/A$2.60/watt$3.50/watt$3.30/watt
v2.0 Update 2June 8, 2007Mod2.0c/Inv2.0bJanuary 7, 2008NoN/A$2.50/wattN/A$2.60/watt$3.50/watt$3.30/watt
v2.0 Update 1May 18, 2007Mod2.0b/Inv2.0aJanuary 7, 2008NoN/A$2.50/wattN/A$2.60/watt$3.50/watt$3.30/watt
v2.0April 27, 2007Mod2.0a/Inv2.0aJanuary 7, 2008NoN/A$2.50/wattN/A$2.60/watt$3.50/watt$3.30/watt
v1.3April 6, 2007N/ANo longer certifiedNoN/A$2.50/wattN/A$2.60/watt$3.50/watt$3.30/watt
v1.2March 16, 2007N/ANo longer certifiedNoN/A$2.50/wattN/A$2.60/watt$3.50/watt$3.30/watt
v1.1February 23, 2007N/ANo longer certifiedNoN/A$2.50/wattN/A$2.60/watt$3.50/watt$3.30/watt
v1.0January 1, 2007N/ANo longer certifiedNoN/A$2.50/wattN/A$2.60/watt$3.50/watt$3.30/watt

Software requirements

  • PC platform with MS Windows OS (Windows 2000, XP, Vista, Windows 7)
    (Sorry a Macintosh version is not available, nor is it anticipated.)
  • Microsoft Excel (2000, 2002, 2003, 2007, 32 bit Excel 2010)
    (Compatibility with 64 bit Excel 2013 has not been tested; however versions 4,1 and 5.0 are believed to be compatible.)

Installation Instructions

  1. For automated installation of a Version 4 calculator, left-click and install the CECPV4_x.msi file. The program will be placed in the C:\CECPV4x directory. A shortcut icon named "v4.x NSHP CECPV Calculator" will be placed on the desktop.

    For automated installation of a version 5 calculator, left-click and install the CECPV5_x.msi file. The program will be placed in the C:\CECPV5x directory. A shortcut icon named "v5.x NSHP CECPV Calculator" will be placed on the desktop.

  2. If you desire the program to be installed in a different directory, download the CECPV4_x.zip file or the CECPV5_x.zip file depending on which version you wish to download. Extract the contents of the zip file into a new folder on your hard disk.
  3. When available above, download and install the most recent Module/Inverter Update to the same directory where the calculator is installed.

Operating Instructions

  1. Using the CECPV Calculator desktop icon (automatic installation option), open the Excel spreadsheet titled CECPV4_x.xls or CECPV5_x.xls. If you used the manual installation option, depending on which version you install, you will need to locate and open the CECPV4_x.xls or the CECPV5_x.xls file from your hard disk. Be sure to enable Macros when asked in the opening window. Also set your Macro Security (menu Tools>Macro>Security) level to medium or lower to allow the program to run (depending on your Excel options).

  2. Once the "Run" button has initiated the calculations, the CECPV tool will run in the background and show up as a minimized program. Please DO NOT close the CECPV window or quit the program. The screen may go blank or all white while the simulation is running. The simulation without compliance forms can take up to 1 minute to complete. The simulation with compliance forms can take up to 3 minutes to complete.

  3. At the end of the simulation the "Results" tab is shown with the monthly and annual kWh production values, the annual TDV and estimates of the incentive at incentive steps 1 through 10 ($). The applicant can see the current incentive step at which they may receive an incentive by going to the NSHP Webtool at: https://www.newsolarhomes.org/WebPages/Public/RebateLevelView.aspx

  4. If the simulation was run with compliance forms, the "View Compliance Form" button will take you to the NSHP PV-1 (formerly CF-1R-PV) form which can then be printed for submission with your NSHP application.


Additional information

  1. Manufacturers interested in adding their equipment to the NSHP eligible equipment should refer to the documents available at http://www.gosolarcalifornia.ca.gov/equipment/add.php.
     
  2. The detailed hourly output from the tool is saved in the CECPV_output.csv file found in either the C:\CECPV4x or the C:\CECPV5x directory depending on which version has been installed. Rename this file to save the results from a run, since it will get overwritten every time a new run is initiated. Similarly the field verification table output can be found in the FVT.csv file which is also overwritten with every run.

For more information contact:
Farakh Nasim
California Energy Commission
1516 Ninth Street, MS-37
Sacramento, CA 95814-5512
Telephone: 916-654-4689
E-mail: FNasim@energy.ca.gov