Solar Water Heater By Energy Economics

Almost minimum operational cost as solar radiation is available free of cost.
* Solar energy is protected from inflation since it is free and everlasting.
* Recovery on investment between 1.5 to 2.5 years depending upon application and capacity of the system.
* Trouble free working with negligible repairs & maintenance cost.
* Fully automatic operation and no day to day human attendance required.
* Custom built design to meet specific quantitative & temperature requirements.
* Clean energy without environment pollution.
* Safer than any other heating source.
* Typical Payback Calculations For Standard Domestic System.
* Capacity of the system 250 LPD at 60oC, Cost of the System : Rs. 36000/- Approx.
* Heat Required in K. Cal. = Capacity X Temperature Difference
= 250 X 40oC ( assumed average Ambient Temperature : 20oC)
= 10,000 K.Cal Comparing with electrical source of heating water
= Capacity X Temperature Difference / 860X 0.80(Efficiency of Electric Heater)
= 10,000 / 668
= 14.53 Units per Day
Considering rate of electricity to be Rs. 4 / - per unit and average output of 320 days.
Expenditure on electricity = 14.53 X 4 X 320 = 18598.40 per year
Hence , the pay back period will be : 36,000 / 18598.40 = 1.93 years