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SOLAR WATER HEATER PAY BACK CALCULATION CHART - DOMESTIC
Note: You may change values where cells are filled with green colour.
Do not change values of cells with red letters.

You may copy values of green cells and red letters to the similar cells in (D) Payback Calculations.

(A). SYSTEM DETAILS

Item details Values Unit
System capacity: LPD
System temperature: deg.C
System cost: Rs.
Cold water temperature: deg.C
System working days: days
Heat generated per year: kcals
Heat generated per collector: kcals

CO2 Emission Reduction tons of CO2 / annum

(B). ALTERNATE FUEL REQUIREMENT DETAILS

Name of fuel Electricity HSD FO LDO LNG LPG
Calorific value (kcals/kg):  
Calorific value (kcals/litre):
Calorific value (kacals/kWh):  
Rate of fuel (Rs.per kg.):  
Rate of fuel (Rs.per litre):
Rate of fuel (Rs.per kWh):  
Inflation rate per annum: %
Conversion efficiency: % % % % % %
Combustion efficiency: % % % % % %
Quantity of fuel required (kg.):  
Quantity of fuel required (litre):
Quantity of fuel required (kWh):  
Total amount:

(C). PAYBACK CALCULATION

OUT FLOW INFLOW BALANCE

80% depreciation, IT savings of 32%

Fuel cost savings



 
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