Why should I go for a Solar Water Heater? What do I save from it?

A 100 litre per day capacity system suitable for 3-4 people can save upto
1500 units of electricity in a year, depending on hot water used. It can
also save around 140 litres of diesel
in an establishment using oil fired
boiler besides reducing green house gas emissions in the atmosphere.
Higher capacity systems will save higher amount of electricity/fuel oil
besides reducing higher amount of GHG emissions.
Electricity is expensive
and is not available due to power cuts in many
areas when required for heating water. Solar Water Heater, since it stores
hot water in an insulated tank, provides water all the time when required.
Fuel oil is also ex
pensive and creates pollution.
Storing
the fuel oil for long
term use in commercial establishments is another problem.
The table below gives approximate likely electricity and money savings for
a
typical 100 liters per day
system
located in different
parts of the country.
Northern
Region
Eastern
Region
Southern
Region*
Western
Region*
Expected no. of days of use
of hot water
per year
20
0 days
200 days
300
days
250
days
Expected yearly electricity
saving
on full use of solar hot
water (units of electricity)
1000
1000
15
00
1250
Monetary savings at different prices of electricity, Rs/year
Rs. 4/kwh
4000
4000
6000
5000
Rs. 5/kwh
5000
5000
7500
6250
Rs. 6/kwh
6000
6000
9000
7500
* The use pattern and savings for southern region pertains to the typical
climate of Bangalore, while those for western region relate typically to
Pune climate.