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New Solar Homes Partnership Calculator

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Flexible Installation Calculator Versions 2.0

The Flexible Installation (FI) Calculator is only to be used for NSHP reservation applications and payment claims submitted under the NSHP Guidebook, Tenth and Eleventh Editions including all 2016 California Building Energy Efficiency Standards projects. The FI Calculator may be used for reservations and payment claims submitted for projects under the 2008 and 2013 updates of the California Building Energy Efficiency Standards if submitted after March 8, 2017, or by request if the reservation was approved prior to this date.
Download the latest version of the calculator on the Download Section
Updated: October 12, 2017

This is a calculation tool used to determine the appropriate program incentive as calculated by the Flexible Installation approach introduced in the NSHP Guidebook, Tenth Edition. The FI Calculator incorporates inverter and module specifications, as well as adjustments based on climate characteristics.

The MS Excel calculation tool 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.


CECPV Calculator Versions 4.1 and 5.0

The CECPV Calculator Versions 4.1 and 5.0 can only be used for NSHP projects subject to the NSHP Guidebook, Ninth Edition, or previous editions of the NSHP Guidebook.
Download the latest version of the calculator on the Download Section
Updated: January 23, 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, Ninth Edition and earlier editions.

Notification and information regarding updates to either the FI or CECPV calculators are provided through the PV Calculator listserv. To receive these updates, you must "register" for the PV listserv by entering your e-mail address below. Registration is voluntary and will only be used to alert FI or CECPV Calculator users of updates and other changes to the calculators. If you have previously registered, there is no need to do so again.

To go directly to the Calculator Download page, please use the link below the listserv registration box.

Note: If you do not register, you will not be notified of changes that may affect rebate amounts.

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Note: Your first & last name and e-mail address must be exact and complete. Incorrect or incomplete addresses will not work. You will receive a welcoming e-mail to confirm your subscription.

If you do not wish to subscribe to the list serve, you can still download the latest version of the FI or CECPV Calculator on the: Download Page.



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