This is caused by the squeegee being angled incorrectly forcing the water under the rubber blade out into the dry area of the glass or from solution being pushed up into the top edge of the window.
Although there is a slight difference between our original calculation and Teslaâs new oneâlast fall we built in a cost of $6,500, Teslaâs current cost for a Powerwall as part of a Solar Roof installation is $7,000.
While the high-end slate tiles looked amazing, the majority of homes in America use a cheaper asphalt shingle roof. Per Teslaâs own chart below, asphalt shingle roofs cost, on average, about $5 per square foot to install. DIY installations come even cheaper. So right off the bat, Teslaâs pricing puts it more in the range of premium roof materials, like tile, metal, and slate.