
Tesla Solar Roof installation time lapse: 40 squares in 4 days by Weddle and Sons Roofing
This article details a Tesla Solar Roof installation completed by Weddle and Sons Roofing near Topeka, Kansas. The project involved a 40-square (4,000 square feet), 15 kW solar roof system. A time-lapse video showcases four days of work, specifically focusing on the installation of PV tiles, glass tiles, and flashings. The initial phase, which included tearing off the old roof and installing a double-layer Firestone underlayment, took one day and was not part of the filmed time-lapse.
The installer provided insights into the duration and complexity of the Tesla Solar Roof installation compared to traditional roofing. A standard shingle roof of the same size would typically take one to two days with an experienced crew. In contrast, the Tesla Solar Roof required five days with a full team, not including additional trips for material handling and other miscellaneous tasks. This duration is comparable to installing a standing seam metal roof. The installer noted that the company is still in the early stages of ramping up Tesla Solar Roof installations and is actively seeking ways to optimize the process and reduce installation times.
Regarding the solar generation aspect, approximately 25% to 30% of the total tile area consists of active PV tiles. These active tiles are strategically placed to maximize solar exposure, primarily on south-facing slopes, while avoiding areas prone to shading from gables. North-facing slopes and smaller roof sections typically feature fewer or no active PV tiles. The edges, including valley and hip sections, are finished with heavy-gauge metal flashing. The tempered glass used in the system means that no cutting of the tiles is required or even possible during installation.
The integration of photovoltaic technology adds several layers of complexity to the roofing process. This includes meticulous layout planning, efficient cable management, precise string design, and thorough testing of the PV system. Furthermore, significant electrical work is necessary to connect the wiring to the inverter and integrate it with the home's electrical system. However, the most time-consuming aspects of the installation, according to the installer, involve the intricate flashing details around various roof obstructions, such as dormers, skylights, and valleys.
The article also touches upon the history and market reception of the Tesla Solar Roof. Tesla CEO Elon Musk had previously proclaimed 2019 as “the year of the solar roof,” a prediction that did not materialize as anticipated. The product's introduction was characterized by marketing challenges, unfulfilled promises, delays, and safety concerns. Despite Musk's claims in late 2019 that version 3.0 of the solar roof tile would reach a production rate of 1,000 roofs per week from Tesla's New York factory by December of that year, actual installations have remained significantly below that target. The article notes that many of the shingle boxes examined in February of the reporting year originated from Changzhou, China, rather than the New York factory. Musk also acknowledged in a conference call that the solar roof might not be financially viable for homes with relatively new roofs, and stated a goal of achieving an eight-hour installation time, which contrasts with the ten days to two weeks and a five to six-person team observed in installations tracked around the San Francisco Bay Area by pv magazine. Despite these challenges, there are satisfied customers who appreciate the aesthetic appeal of the solar roof compared to conventional composite shingles.
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