U.P. Sustainable solar provides the most advanced technology in solar water heating. A twenty tube evacuated tube solar hot water system will provided most of the hot water needs of the average home. Depending on the number of home occupants, evacuated tubes can provide 60 to 70 % of domestic hot water needs. Additional arrays of hot water tubes can be connected in series to provide for the commercial needs of a business.: Also, arrays can be linked together to heat a home with base board hot water heat.  Thus, a solar hot water system could eliminate up to 24% of your home energy costs and all of the cost of heating water. Next to energy efficiency, solar hot water is the fastest way to reduce your energy bill.