A.  Our solar collectors are much more affordable than many other solar hot water heaters.  For a household of 4, the price of a full system may not be too much more than a new electric or gas system.  Depending on your location (solar levels) and current hot water usage the annual electric or gas saving will differ.  However in a normal household that spends 25% of its electricity bill on hot water heating, the full cost of purchase may be recouped as quickly as 4-5 years in reduced bills.  A solar collector should provide reliable operation for at least 10-15 years.  You will definitely make considerable savings during the life of the solar water heater.