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.
A square is 100 square feet. I am assuming that the Tesla roof tiles are tempered plate glass so I am assuming from a material standpoint the price would be comparable, but considering the volume and size of each piece I think it's likely lower. On alibaba that's between 4 and 18 dollars a square foot.