• Because Solartwin is far simpler than traditional solar water heating.
• Designing out complexity means designing away from problems.
• Minimising disruption, Solartwin usually takes less than a day to fit.

Back to the top

• No mains electric bills, thanks to Solartwin’s 100% solar powered pump. Solartwin=heat+electricity.
• Solartwin often needs less top-up heating than traditional solar technology, thanks to more hot and less tepid water due to the way hot water is stratified (floated) over cold
• Rapid fitting, less top-up heating & solar powered pumping = real value, not just to you but also to the environment.

• Double glazing in front of the solar panel lets the sun’s heat and light in. This solar energy makes it very hot.
• Daylight runs an “intelligent” and efficient variable speed solar electric pump.
• It pumps cold water, via a narrow pipe, from the bottom of your existing hot water cylinder into the solar hot water panel. Here, the water heats up.
• Thanks to the pump, your solar hot water, and the free energy it contains, then delivers itself, direct, to the top of the hot water cylinder. That’s it.

Back to the top

• Solartwin is reliable, proven, robust, safe, low maintenance, form of solar water heating. It comes with a 5 year performance warranty in UK / Ireland.
• Comprising very few parts and made in UK under ISO 9002 quality management, Solartwin is intrinsically reliable. It uses no antifreeze chemicals and frees you from safety concerns about highly pressurised piping, mains voltages and large smashable glass panels or tubes.
• Robust yet flexible pipes made from silicone rubber give bacteriological safety, as do high water temperatures.
• Electric power cuts do not make Solartwin need repressurisation by an engineer.
• Going on holiday? Solartwin solar panel is inherently self-regulating, so you don’t need to invite neighbours in for baths. You can even turn off the main stopcock if you want.
• Moving house? Simply un-install and re-install your solar panel: your warranty is portable!

Back to the top

• Because solar water heating is (potentially) a profoundly environmental product, and we want to make it that way.
• Because our 100% solar electric pumping system eliminates the typical 20% environmental penalty associated with using mains electricity to run solar heating pumps and controls.

Back to the top

• A recent UK government-funded study of eight solar water heating systems at Milton Keynes confirmed what has long been suspected: that the environmental benefits of solar can be substantially improved by eliminating mains electricity. (Side by side testing of eight solar water heating systems 2001 DTI/Pub URN 01/1292 (PDF) )
• In this study, flat plate solar hot water systems negated an average of 17% of their potential global warming benefits (i.e. CO2 savings) by using mains electricity.
• For partial-vacuum tubes ("solar tubes"), their loss averaged even higher, at 23%.
• In other words, if you run mains-powered solar for ten years, its electricity consumption deletes its CO2 saving by about two years.

• goodbye to antifreeze chemicals
• keep your cylinder: waste less
• uses “green” hydro-aluminium
• lightweight: less embodied energy
• hotter water = less top up heat
• energy-efficient microbore pipes
• phone, not car surveys save CO2

• Eliminating most of the controllers, plumbing, antifreeze, unreliability & maintenance inherent in traditional solar water heating systems.
• Usually delivering hotter water whether it is sunny or overcast, and earlier in the day.

Back to the top

• Variable speed pumping is more accurate than traditional on-off control. Solartwin measures and adjusts to daylight as dull as 10-20%, so water stays longer in the panel, heating up better.
• Our panel coatings maximise heat gain up to around 70C, while usually giving boil-protection when you are away. Harvesting 95% (+/- 3%) of ordinary daylight plus non-visible infrared, our coatings don’t need hot days nor bright days to catch energy effectively.
• No heat exchangers. Indirect solar heats water via a heat exchanger at the bottom of a costly new cylinder. But solar heat exchangers impose system inefficiencies: they rely on cooling in order to operate. Some partially evacuated tube (solar tube / evacuated tube) systems have second heat exchangers on the roof.
• Top down heat. Solartwin delivers heated water direct to the top your existing cylinder, maximising temperature by floating (stratifying) it, unmixed, on cooler water below. So when you open your tap, Solartwin hot water arrives, first. And it gets hot earlier in the day.