A set of Tesla Solar Roof tiles.
Solar shingles, also called photovoltaic shingles, are designed to look like and function as conventional roofing materials, such as or slate, while also producing electricity. Solar shingles are a type of solar energy solution known as (BIPV).
There are several varieties of solar shingles, including shingle-sized solid panels that take the place of a number of conventional shingles in a strip, semi-rigid designs containing several silicon solar cells that are sized more like conventional shingles, and newer systems using various technologies that match conventional shingles both in size and flexibility. There are also products using a more traditional number of silicon solar cells per panel reaching as much as 100 rating per shingle.
Solar shingles are manufactured by several companies but the three main manufacturers of solar roof shingles are , , and . Other active companies in the US include SunTegra Solar Roof Systems, and Atlantis Energy Systems (asphalt and slate systems).
Solar shingles became commercially available in 2005. In a 2009 interview with Reuters, a spokesperson for the estimated that their entry into the solar shingle market would generate 5 billion in revenue by 2015 and billion by 2020. Dow solar shingles, known as the POWERHOUSE Solar System, first became available in , in October 2011. The POWERHOUSE Solar System continues to live on in its 3rd generation iteration, and has exclusively been licensed to RGS Energy for commercialization. In October 2016, Tesla entered the solar shingle space in a joint venture with .
Solar shingles are photovoltaic modules, capturing sunlight and transforming it into electricity. Most solar shingles are 12 in × 86 in (300 mm × 2,180 mm) and can be stapled directly to the roofing cloth. When applied they have a 5 in × 86 in (130 mm × 2,180 mm) strip of exposed surface. Different models of shingles have different mounting requirements. Some can be applied directly onto roofing felt intermixed with regular asphalt shingles while others may need special installation.
Some early manufacturers used solar thin-film technologies, such as to produce electricity, which are less common in the solar industry than silicon-based cells. Current manufacturers, such as RGS Energy, CertainTeed, and SunTegra, have chosen to use the industry-standard monocrystalline or polycrystalline silicon solar cells in their POWERHOUSE 3.0, Apollo II, and SunTegra Shingle, respectively. The installation methods for some solar shingle solutions can be easier than traditional panel installations because they avoid the need to locate rafters and install with a process much more similar to asphalt shingles than standard solar panels.
Solar shingled roofs tend to have a deep, dark, purplish-blue or black color, and therefore look similar to other roofs in most situations. Tesla Solar has developed shingles in several styles to better match traditional roofs. Homeowners may prefer solar shingles because they avoid having large panels on their roofs. Coming in 2018 Tesla will offer shingles in slate and Tuscan styles, these are the first of the solar shingles which look the same as a slate or Tuscan style roof but still provide solar power. They also have been "Test video for the highest (class 4) hail rating, filmed at 2,500 frames per second. Each 2" hailstone is travelling 100 mph on impact." which shows how these new options are also safer in disasters than tradition materials.
The cost of solar shingles can range from .00 per watt up to .00 per watt installed depending on the manufacturer, technology used, and system size. As of Q3 of 2015, the average cost of a traditional, roof-mounted residential solar panel installation in the United States was just above .50 per watt, according to the . While solar shingles are typically more expensive to install than traditional solar panels, some companies in recent years since 2014 have made strides to lessen the gap between the installed cost of going solar with panels versus going solar with shingles.
According to Dow Chemical Company reports, a typical residential install consisting of 350 solar shingles can cost at least ,000; however, federal and state incentives depending on the location might significantly bring down the cost.
Solar contractors typically offer homeowners a full-service price for solar installation, which includes equipment purchasing, permit preparation and filing, registration with the local utility company, workmanship warranties, and complete on-site installation. Because photovoltaic solutions produce power in the form of and the standard in homes is , all grid-connected solar installations include an to convert DC to AC.
As of 2015, companies offering solar shingles in the United States included CertainTeed, Forward Labs, SunTegra Solar Roof Systems, and Atlantis Energy Systems (asphalt and slate systems).
In January 2018, Tesla announced, after testing on employees' roofs, that it would begin installing the on commercial customers' homes "within the next few months".
RGS Energy announced in October 2017 that they will be offering the third generation POWERHOUSE modules in 2018 after obtaining UL Certification.
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