Solar Water Heaters once installed requires very little maintenance. Maintenance of solar water heaters involves wiping the dust deposited on the glass surface once in 5 days.
Wiping the glass every day will help increase the efficiency of the solar water heater system.
Other important thing to be taken care of is to see that the main cold water tank from which water is supplied to the solar tank is always filled up to the level.
Use of Automatic water Level controller can help in maintaining an optimum level of water.
Maintenance required by Solar Water Heaters?
ETC or Evacuated Tube Collector based solar water heaters do not need any significant maintenance.
The collector tubes of the solar water heater may need annual cleaning to remove accumulated scale and sediment deposits at the bottom of the tubes.