The contents of this Section, including all opinions and other postings, are offered for informational purposes only and should not be construed as legal or tax advice. You should consult directly with an attorney or accountant for individual advice regarding your particular situation.

WEBINAR – Evolution of Solar Thermal Requirements in US Building Codes

This webinar was originally presented in January, 2019, and provides an overview of the codes that impact the solar heating and cooling industry across the U.S. It identifies the relevant model codes and where they are adopted. It also notes states where local and amended codes are being used, creating localized requirements. The webinar describes ways key solar industry standards like SRCC Standard 100, 300 and 400 are referenced in the codes. It also shows how many other non-solar standards like NSF 61, NSF 372, UL 1703 and ASCE 7 can apply to solar heating and cooling systems. It ends by showing how certifications and listings are used to show compliance with code requirements.

Federal Investment Tax Credit for Solar Thermal Products

The federal Investment Tax Credit (ITC) provides for tax credits for various renewable and energy efficient products in residential applications in some cases. Solar Water Heating equipment is addressed by this credit, which requires the product to be "certified for performance by the nonprofit Solar Rating and Certification Corporation or a comparable entity endorsed by the government of the state in which the property is installed." ( 2016 IRS Instructions for Form 5695, Cat. No. 66412G ). For more information consult the IRS Instructions for Form 5695, IRS Instructions for Form 3468 and a qualified tax professional. Additional resources are provided below.

California Solar Initiative Thermal Program (CSI Thermal)

The CSI Thermal program provides incentives for the installation of solar thermal systems for use in residential domestic water and pool heating applicaitons in covered regions of California. It is available to customers of the investor-owned utilities Pacific Gas and Electric (PG&E), Southern CA Edison (SCE), San Diego Gas and Electric (SDG&E). It is a component of the Go Solar California campaign. The program offers incentives based on the performance of the system chosen, and utilizes online calculators to allow users to calculate estimated incentives. Systems must meet program requirements to be eligible, including certification to OG-100 and OG-300. Note that incentive funds for certain types of systems have been fully expended, and that the program is currently set to end on July 31, 2020 (see April 18, 2019 Guidance Letter below).

Database of State Incentives for Renewables & Efficiency (DSIRE)

DSIRE is the a comprehensive online source of information on incentives and policies that support renewable energy and energy efficiency in the United States. Established in 1995, DSIRE is operated by the N.C. Clean Energy Technology Center at N.C. State University and is funded by the U.S. Department of Energy. DSIRE contains information on many regulations and incentive programs for solar heating and cooling technologies, most of which reference SRCC OG-100 and/or OG-300 certification. The easy-to-use website allows users to seek out programs applicable to their U.S. state and technology and application of interest. Click here to learn more about DSIRE.

ICC-SRCC™ Overview of Overheat & Freeze Protection in OG-300 Certified Solar Thermal Water Heating Systems

Created by the Solar Rating and Certification Corporation (ICC-SRCC), the document provides a review of various methods of for protecting solar thermal water heating systems from freeze damage or damage caused by extremely high collector temperatures in no-flow conditions (known as stagnation).

Natural Resources Canada (NRCan) Energy Simulation Tools

Natural Resources Canada has developed and maintains energy simulation tools for low-rise residential buildings. The software was designed to support the EnerGuide Rating System, ENERGY STAR® for New Homes and R-2000 energy efficiency programs. NRCan also supported the addition of Canadian One-Day Ratings to most ICC-SRCC OG-300 system certifications. This value, which is based on the conditions established in the CAN/CSA F379 Series-09 (R2013) - Packaged solar domestic hot water systems standard.