Long Life about 20 years.
Requires practically no maintenance.
Corrosion resistant structures and hardware.
Huge Savings on electricity bills and pay back within 2 years.
High Thermal efficiency using the world’s latest, proven and tested.
Requires lesser space as compared to conventional solar water heaters.
Electrical back-up is also available to provide additional heating during the monsoon season.
PUF insulated Stainless Steel Tank with SS cladding ensures hot water even on winter mornings.
Handles hard water with ease without drop in efficiency and does not require frequent internal cleaning.
Evacuated Glass Tube Collectors, which track the sun throughout the day and intercept more than 92% of incident solar radiation.
# | Features | ETC type systems | Flat Plate Type systems |
---|---|---|---|
Sun Tracking | Circular glass tubes allow Auto Sun tracking and ensures maximum heat absorption (>93%) throughout the day | Due to flat surface of the collector, sun tracking is not possible. Maximum heat absorption only at 12 noon | |
Effect of External Weather and Ambient Temperature | Design independent of ambient temperature, Ideal even during winters | Design dependent on ambient temperature results in low efficiency during cold weather | |
Hard Water Effect | Non-metallic glass tubes of much larger diameter 37 mm prevents chocking and ensures maximum efficiency and life of the system without frequent cleaning and maintenance. Glass tubes and tanks can be cleaned manually | System efficiency drops drastically as hard water causes scaling and chokes the narrow metallic absorber pipes (12mm). Leakages could also develop. Requires frequent expensive cleaning of pipes, manual cleaning of tank is impossible due to completely sealed design | |
Start-up and Heating time | Short start-up time from cold to hot in just 2 to 3 hours | Long heating process from cold to hot takes 5 hours | |
Connections between Collectors and storage tank | integrated design eliminates interconnecting pipes completely | Uses interconnection pipes that result in heat loss and reduces system life | |
Numbers of collectors for a 115 LPD system | 15 evacuated glass tubes | 8 to 10 Copper fins | |
Storage Tank Insulation | Highly efficient PUF insulation for overnight retention of heat, PUF does not absorb water and has absolutely no deterioration is extremely long lasting. | Generally glass wool / rock wool are used. Susceptible to getting soaked during rains, thus requiring frequent replacement | |
Installation Space Requirement (for 115 LPD) | Due to higher efficiency, the overall size of the system is much smaller with base length of only 6 feet. Balcony type cantilever mounting is possible. Ideal for multi storied apartments, reducing hot water piping | The system has a base length of 10 feet. It can be mounted only on rooftops, cannot be used for multi-storeyed apartments due to heat loss in lengthy pipes from roof | |
Relative position of cold water tank | Cold-water tank could be mounted at a height of only 4 feet from the base of the system | Cold-water tank must be mounted at a height of about 7 to 8 feet from the base of the system |