The best-known of these tools is probably the hand-held window squeegee, used to remove the cleaning fluid or water from a glass surface. A soapy solution acts as a lubricant and breaks up the dirt, then the squeegee is used to draw the now water-borne dirt off the glass leaving a perfectly clean surface.
Another way of estimating the cost of electricity would be the cost of an ordinary solar system, or $21,000 as shown in the example above. So the cost of a Tesla retrofit system would be in the range of $33,000 to $37,500.
That covers maintenance, as well as power costs, with Tesla optionally offering to install a dedicated meter just for the charging station alone, from which the bill will go directly to Tesla itself. The cost for Tesla is between $100,000 and $175,000 depending on the station, and a lot of those come from the permanent modifications needed at the site to support the Supercharger itself.