Solar Water Heater

In the search for more cost effective and environmentally sustainable energy sources, solar hot water provides the perfect solution. Solar heating has become a popular way to reduce hot water costs, which account for around a third of total energy use and more than half the average electricity use in a house. Greenfinity has developed a range of solar hot water systems that use advanced evacuated glass tube technology to capture the sun’s thermal energy. The result is a solar hot water system that delivers an improved energy efficiency of up to 92%. The Greenfinity hot water systems are not only designed to provide superior performance but will also look great and add value to your home. With superior design and enhanced insulating properties, the collectors optimise energy capture while minimising heat loss, providing greater energy efficiencies, particularly during the winter period when thermal energy is at its lowest. Over the past few years, Greenfinity has acquired vast experience & knowledge in setting up big projects which range from 500 liters/day to 1,00,000 liters/day with a temperature range of 60 to 90 degrees Celsius (higher capacities and temperatures can also be provided for special applications). Although Greenfinity supplies & installs both Evacuated Tube Collector(ETC) & systems flat plate collector type (FPC) systems we recommend the use of ETC type systems wherever possible because of their dual advantage of cost savings and better performance. Unlike other types of solar collectors (like flat plate or copper tube collectors), the efficiency of evacuated tube solar collectors (ETC) are much less influenced by weather changes.

Features of ETC type Solar Water Heater Systems:

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.




Comparison beetween flat plate and etc.

# 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

Due to continuous developments and product improvement, the company reserves the right to change / alter specifications.

Types Of Solar Water Heaters

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Domestic Water Heating Non Pressurized

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Domestic Water Pressurized System

ETC Manifold Systems without CPC reflector

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ETC Manifold Systems with CPC reflector

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ETC Systems with Heat pump

More Products

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Tested & Approved by Government of India.