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Energy CalculatorUsing this energy calculator you may
determine how much energy a Tri Solar
collector Insolation Level  Before you
calculate your energy output, you must know your solar
insolation level. This are available from the insolation page. Take note of your max and min levels throughout the year
as well as the annual average value. When assessing potential
energy savings, input annual average insolation, and take note
of the "per year" energy output value.
Energy must be input in the unit kWh/m^{2}/day. 1 kWh/m^{2}/day = 317.1 Btu/ft^{2}/day Collector Size  You must enter the collector size in absorber surface area. The absorber surface area of the various tubes sizes are as follows:  58/1800 = 0.08m^{2} per tube. Therefore a Tri Solar AP 20 tube = 1.6m^{2} absorber area  58/1500 = 0.067m^{2} per tube Energy Cost  Enter cost per kWh in your local currency (may need to convert from m^{3} or Therms) 1 therm = 29.3kWh = 100,000Btu = 105.5MJ Natural Gas is 39MJ/m^{3} = 10.83 kWh/m^{3} LPG Propane (liquid) = 25.3MJ/L = 7kWh/L LPG Propane (gas) = 93.3MJ/m^{3} = 25.9kWh/m^{3} 