This guide breaks down the photovoltaic bracket model selection requirements you can't afford to ignore, complete with real-world nightmares (and success stories) from the trenche HOME / Photovoltaic Bracket Model Selection Requirements: Don't Just Wing It!. This guide breaks down the photovoltaic bracket model selection requirements you can't afford to ignore, complete with real-world nightmares (and success stories) from the trenche HOME / Photovoltaic Bracket Model Selection Requirements: Don't Just Wing It!. The Renewable Energy Ready Home (RERH) specifications were developed by the U. Environmental Protection Agency (EPA) to assist builders in designing and constructing homes equipped with a set of features that make the installation of solar energy systems after the completion of the home's. . Photovoltaic bracket selection rules char today,will be installed by the homeowner. While metering the system is encouraged,the specification does not address system wiring elements for associa le,snow loadsfor the existing roof design. These plans will provide important information for the solar. . system designer will also determine the required cable sizes, isolation (switching) and protection requirements. There are standards for nearly every stage of the PV life cycle, including materials and processes used in the production of PV panels, testing methodologies, performance standa mportant role in the Photovoltaic. . There are other factors that will limit the size of your solar photovoltaic system some of the most common are roof space,budget,local financial incentives and local regulations. When you look at your roof space it is important to take into consideration obstructions such as chimneys,plumbing. .