The floor squeegee is similar to the window squeegee but has a long handle like a push broom, used to clean floors after they have been sprayed with water or soap, to push the water into drains.
SolarCity offers a 9-year Powerwall lease for $5,000 when part of a rooftop solar panel installation and financing contract. To buy and install the battery outside of financing a solar deal, the price is $7,140.
While such projections have been all over the map, Navigant's is pretty close to at least one other made last summer. Last July, McKinsey & Co. put out a report saying that lithium-ion battery prices would fall from about $600/kWh to $200 by the end of the decade to a relatively thrifty $160 by 2025.pecifically, lithium-ion costs, which are tipping the scales at about $500 per kilowatt hour now, could fall to $300 by 2015 and to $180 by 2020.