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.
If I didn't put my surplus solar into my Tesla I could sell it to my utility for .035 cents per kWh under their buy back program. So my cost is .035 per kWh charged. I can go three miles on a kWh so my cost is just a little over one cent a mile for electrical energy. At $4.00 a gallon for premium and just under 20 miles per gal the ICE I replaced cost $.20 per mile. For me the cost difference is 20 to 1.