1 The molten glass can be poured into a mold and let cool. 2  This method was used by the Egyptians, and it is also how many lenses are created today. 3  A large amount of molten glass can be gathered at the end of a hollow tube, which is then blown into while the tube is turned.
Indirect costs vary depending on the indirect cost base. Indirect costs are assessed either on a Total Direct Cost (TDC) basis or a so-called Modified Total Direct Cost basis (MTDC). Check sponsor guidelines for direction.
With Wholesale Solarâs current pricing a medium sized gridtie system that generates about 850 kWh a month would cost about $11,269.00 BEFORE the 30% federal tax credit and rebates offered by your state or utility company. This particular system includes twenty four solar panels. The Federal tax credit would take the cost down to $7,350. This price does not include installation, which can be easily accomplished by a DIY-friendly homeowner or a trusted contractor.