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.
Remember, the cost of Tesla solar shingles will be high, and the installation will be complex (many dummy shingles, small shingle assemblies, tricky and specialized wiring, expensive wire penetrations in attic to conceal cables, etc).