Heaters/ Concept

Solar water heater
(100 liters )

Electric water heater
( 60 liters )

 Gas water heater
( 31kw, 20 liters per min )

Equipment Investment

1500.00 RMB

3200.00 RMB

 3100.00 RMB

Number of days used usually

300 days

 300 days

 300 days

Cost of energy per year

 0

 750.00 RMB

 670.00 RMB

Equipment investment in 15 years

1800.00 RMB

6400.00 RMB

 9100.00 RMB

Total expenses in 15 years

1800.00 RMB

17650.00 RMB

 19150.00 RMB

 Risk

    No

   Yes

   Yes

Pollution

    No

   Yes

   Yes