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Evacuated GlassTube Collectors combine the high efficiency performance of evacuated tubes with rapid heat transfer capacity of heat pipes to provide a collector that can operate efficiently in almost any climate providing hot water for residential or commercial solar water heating projects.

The Key Component of the Evacuated Glass Tube Solar water heater is the Evacuated Glass Tube(EGT). The Evacuated Glass Tube having the best possible insulation (Vaccum Jacket), allows sunlight to pass through, but prevents thoroughly the thermal heat transfer, featuring high efficiency, low heat loss and longer life.

The use of Evacuated Glass Tube Technology appears to be one of the significant progresses in the solar industry all over the world. Now Evacuated Glass Tube solar systems are popular through out the world

When light energy is absorbed by a material known as a semiconductor, an electrical charge is created, this property of the material is known as the photoelectric effect. Silicon is the most common semiconductor used by PV cell manufacturers.

A grid-connected PV system is one which connects to the electricity grid. The electricity produced by the PV system is "exported" to the grid. The main advantage of using a grid-connected PV system is that the grid can be used as what is effectively an electricity storage system, where the electricity is "stored" and then "re-purchased". A grid-tied system of this type is of interest when a payment is available for the electricity being exported to the grid, to offset the cost re-purchasing of electricity exported to the grid. Grid-connected PV systems do not need physical storage systems (batteries) and so the investment cost is reduced.

In a typical grid-connected PV system, the electricity is fed from the PV modules into an inverter. The inverter converts the electricity produced by the PV system (which is DC) into AC electricity for export to the electricity grid. The inverter is usually connected to either the main circuit breaker or fuse box, or else connected directly to the incoming cables from the grid. If the PV system is not supplying sufficient electricity to power the loads in the building (e.g. at night, when there is no solar energy available), then the electricity from the grid is used. When the electricity supplied by the PV system is greater than the loads in the building, then the electricity can be exported to the electricity grid. In cases where there is a payment available for exporting electricity, this is an attractive option. Obviously it depends on the level of payment being offered.

cells are manufactured by placing a thin film of amorphous (non crystalline) silicon onto a wide choice of surfaces. These are the least efficient and least expensive to produce of the three types. Due to the amorphous nature of the thin layer, it is flexible, and if manufactured on a flexible surface, the whole solar panel can be flexible. One characteristic of amorphous solar cells is that their power output reduces over time, particularly during the first few months, after which time they are basically stable. The quoted output of an amorphous panel should be that produced after this stabilization.

Solar water heaters use the solar energy from the sun to generate heat (not electricity) which can then be used to heat water for showering, space heating, industrial processes or even solar cooling.

The most common hot water system involves heating and then storing hot water in a tank. When hot water is used, it is drawn from the top of the tank, where the water is the hottest, and fresh cold water is delivered into the bottom of the tank. Because hotter water is lighter and sits above colder water, it is realistic to see a tank that has bottom half cold and the top half hot. this is referred to as thermal layering, or stratification. Eventually after enough hot water usage the water suddenly turns cold, which is something everybody has probably experienced!

1kWh of heat energy can heat about 30 Litres 7.5 US gallons of water up from cold to showering temperature. A household of 5 people will use between 10-15kWh of energy each day to heat water (not including space heating). In the winter more energy is needed to heat water as the cold water is colder, and people often have longer and hotter showers than in the summer. Water is normally heated by electricity or gas, but solar can be used to offset between 60-80% of this energy.

The Greentek flat plate solar thermal collector is suitable for residential or commercial solar water heating projects. The collector features a low profile (75mm 3" profile) design, which combined with ultra-lightweight melamine foam insulation, makes it one of the lightest flat plate panels per m2 on the market. The TINOX Energy Aluminium absorber sheet absorbs up to 95% of available sunlight converting into usable heat.