ISL Drain Back Panel Solar Systems
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The Imagination solar collector is fully compliant with all British and European standards, including BS EN 12975. It is particularly attractive when roof integrated, but can be mounted on a framework above the roof, or on a flat roof. This means the panel is actually recessed into the roof, rather than sitting on top of the tiles. This provides an attractive low profile appearance, very similar to a low lying 'Velux' window.
Installing the panel into the roof is very simple and can be done in a day. The tiles are removed, the panel is laid on the roof battens and the tiles are put back to the edge of the panel in a watertight fashion
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The solar panel has a highly transparent, virtually unbreakable poly carbonate cover which has been treated to ensure long life.
Behind this is the solar absorber which is made of 0.2 mm copper sheet, covered with a black chromium oxide selective layer, and behind the absorber is 50mm of insulation.
As a result of these measures almost all the solar energy is absorbed and radiation losses are reduced to a minimum, ensuring high efficiency
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The ISL Station and Fittings
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The pump station for this system is different from the other as it uses siphonic drain back to provide freeze and boil protection without the need for anti-freeze.
It utilises low flow technology, requiring a very low power pump, which can be run by solar electricity, giving a total solar solution, this means 100% free energy
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The solar hot water system power supply provides both controller and pump with 21 volts DC.
The pump will start when there is enough sunlight, which is measured by a sensor within the solar collector.
The signal is interpreted by a microprocessor controller, which also controls the safety functions and a time delay.
Because the control operates on low voltage DC it is suitable for operating from a small PV
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Installing a solar thermal hot water system can provide up to 60% of the hot water in an average house, and installing a condensing boiler can save up to 35% on fuel bills
(click on the pictures for a larger view)
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Fitting PV on the roof is a way of generating some, if not all, of a building’s electricity requirements with no running costs and no pollution, indeed every Kilowatt hour of solar electricity you produce will save approximately 0.43 Kg of CO2 .
A typical household, careful with its use of electricity, should be self-sufficient over a year with a 3kW system and save nearly 1.2 tonnes of C02
(click on the pictures for a larger view)
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