We supply solar water heating systems, not just solar panels worldwide.

Solartwin.com = Zerocarbonsolar.com = the solar business exporting what we believe are the best solar panels for solar water heating worldwide. Why?

• Because Solartwin solar water heating systems which are 100% powered by solar energy.
• Because we offer a safe, simple and reliable solar thermal technology.
• Because we offer technical solar installation design advice for solar heatng installations anywhere in the world.

Our mission is to deliver zero carbon solar water heating panels (solar thermal) solar water heating systems which are designed to cut global warming, save CO2 and save money.

Who are Solar Twin Ltd?

We are a solar company and solar equipment supplier based in UK with enthusiastic customers all over the world. People buy solar, direct from us. Our customers include householders, solar installers, plumbers, house builders and industry.

People choose Solartwin because of our superior product and also because we develop high quality relationships with our customers.

If you have a solar water heating project, please contact us now on hi@solartwin.com. Tell us your solar heating plans or ideas and we we will help you define exactly what you need. Then we will ship your solar water heating system to you. Plus we offer solar installer training material plus telephone support for your installation, if you should need it.

We aim to offer the best value. You can order solar technology for immediate export with delivery anywhere in the world.

Solartwin gives simple, reliable and affordable solar energy. Buy solar hot water heating environmentally. Solar power your washing and bathing now! Save energy. Get a Solartwin DIY kit and a 30-70% cut in hot water energy bills. Cut global warming: install solar to reduce CO2 emissions. Buy solar panel water heating systems from a from a solar panel manufacturer.

The best buy solar water heating systems are zero carbon. Solartwin’s solar technology eliminates the environmental contradiction in conventional solar heating. Old solar equipment burns mains electricity in its pumps and solar panel controls. But Solartwin’s intelligent solar pump is 100% solar powered: zero carbon, powered by solar electric (PV, photovoltaic) solar panels. Search for Solartwin on youtube!

Call 00 44 1244 403 407 or email hi@solartwin.com for solar prices!

We can despatch solar panels worldwide within 7 days of payment of order. Thank you for inquiring about Solartwin.

Now for the details…

High performance off-grid solar hot water systems at a brilliant price…
• Solartwin solar heating is far simpler than traditional solar technology. • Minimising disruption, the Solartwin Solar water heating system usually takes less than a day to fit. Low running costs! Why?
• No mains electric bills, thanks to Solartwin’s 100% solar pump. Solartwin=heat+electricity.
• Solartwin solar thermal often needs less top-up heating than traditional solar, thanks to more hot and less tepid water. Rapid fitting, less top-up heating & solar powered pumping = real value!

Simple, technically elegant, double award winning new solar panel technology.

Our solar power design brief maximises reliability, simplicity, environmental benefits and hot water delivery while minimising capital and running costs.

Invented at Napier University in Scotland Edinburgh, Solartwin won a “Smart Award” for from the UK government for its innovative freeze-tolerant solar panel technology. In 2003 it won again – a Smart Achievement Award” – for commercial success. Hidden in the patented heat absorber of the solar collector are unique flexible solar water channels.

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

It looks good. The Solartwin solar water heating panel slim matt black frame looks like a big, neat roof window.

Reliable, proven, robust, safe, low maintenance solar technology, 5 year warranty.

A five year performance warranty comes with Solartwin. 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 solar 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? Your Solartwin equipment is self- regulating, so you don’t need to invite neighbours in for baths. You can even turn off the main water suppply if you want.

Our solar panels can install so easily.

Solartwin is designed for existing homes and new homes. Two people can get a standard Solartwin solar panel fitted in under a day. With few components, Solartwin halves the workload and disruption of traditional solar heating panels. Install it yourself or ask a professional to install your solar panel. Either way, you save. The traditional solar installation team needs 3 full skills in the team: roof working, advanced plumbing and mains electrics. But Solartwin only needs safe roof working and competent plumbing. A mains electrician is not needed. Bolt the lightweight Solartwin panel to the roof. Pass 2 flexible microbore pipes and a cable indoors. Much of the rest happens in the attic, keeping your home tidy. Plumbing is easier than fitting a washing machine: two microbore pipes connect into existing pipes. You don’t usually plumb in a space-consuming and costly new cylinder, nor vent pipes, nor a pressure vessel. And no mains electric wiring at all. Your solar home is now completed!

The solar innovations.

100% solar electric pumping eliminates the typical 20% environmental penalty associated with using mains electricity to run solar heating pumps and controls. A recent UK government-funded study1 of eight solar water heating systems confirmed what has long been suspected: that the environmental benefits of solar can be substantially improved by eliminating mains Electricity from operation use of solar panels.

Flat plate panel solar water heating systems negated an average of 17% of their potential global warming benefits (i.e. CO2 savings) by using mains electricity. For partial-vacuum 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.

Solartwin’s environment-centred design for solar heating systems brief specifies a solar electric pump.

Here is the zero carbon operation – so your CO2 savings will not retreat two steps after advancing ten. We aim for Solartwin to be the world’s most sustainable form of pumped solar.

Our environmental technology and our ways of working are both environment-centred.

1. goodbye to antifreeze chemicals 2. keep your cylinder: waste less 3. uses “green” hydro-aluminium 4. lightweight: less embodied energy 5. hotter water = less topup heat 6. energy-efficient microbore pipes 7. phone, not car surveys save CO2 8. totally off-grid, 100% solar pump! 9. Solartwin keeps it simple…

Freeze-tolerant technology for both performance and simplicity Solartwin’s flexible thermally conductive pipes actually freeze solid in winter without cracking. In sun, they melt fast. This makes Solartwin unique, by:

• Eliminating most of the controllers, plumbing, antifreeze, unreliability & maintenance inherent in traditional solar.
• Usually delivering hotter water whether it is sunny or overcast, and earlier in the day. Why? Because of Solartwin’s variable speed single pass pumping, black panel coatings, no heat exchangers and stratified (top down) hot water storage.

Is the Solartwin solar technology OK for my property?

Yes, if you can face the panel mainly unshaded, roughly towards the sun. South, southwest or southeast roofs are ideal. Even east or west roofs are usually acceptable. (Apologies to solar inquirers in Australia, New Zealand, South Africa and to many others: please reverse North and South if you live in the Southern hemisphere.) Easily, if you have a traditional low pressure vented hot water system. This means a hot water cylinder, with its cold tank above, usually in the attic. Thermal stores are an easy fit, too. Yes, if, height-wise, there’ll be under 5 metres height (up or down) between the water level in the cold tank and the panel’s midline. OK in most homes. Yes, if your hot water store holds over 100 litres.

Who uses Solartwin? Want to do something significantly positive for the environment? Or do you use costly fuels? Homeowners, self-builders, pool owners, farmers, businesses and House builders all use Solartwin to collect solar renewable energy, reduce global warming and save money.

Hotter water from your solar panels, how?
• 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.
• Special black panel coatings maximise solar energy 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 Twin- optimised zoned coatings don’t need hot days nor bright days to catch energy effectively.
• Solar installations with no heat exchangers are possible. Indirect solar equipment usually heats water via a heat exchanger at the bottom of a costly new cylinder. But heat exchangers impose system inefficiencies: they rely on cooling in order to operate. Some partially 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.

Solartwin’s solar thermal technology specification.

Solartwin has Solar Keymark. This is Europe’s too level of accrediation for solar collectors. A standard Solartwin installation supersedes traditional solar in several ways. It gives direct solar water heating from a patented, freeze tolerant, double glazed flat plate with a variable low speed photovoltaic circulation, using no heat exchanger. Water is the heat transfer fluid. (Older solar designs use indirect antifreeze circuits, heat exchangers, mains powered control, high power pumps plus collectors such as metal back-piped flat plates or vacuum tubes.) Over 80% of our panel is easily recyclable.

How big is the solar panel?

It usually looks big on the ground and smaller on the roof of your solar house! The main Solartwin water heating panel measures 2.465m x 1.265m x 80mm deep. (approx 8’ 5” x 4’ 5” x 3”). Fitted, it normally projects less than 100mm above the roof, so it is often treated as “permitted development” by UK planners. Its “footprint” with frame is 3.25 sq m. The “aperture” to the sun is 2.8 sq m. Lightweight, weighing 31 kg (empty) or 33 kg (full) it rarely requires UK building control.

What is it made of?

The main metal is mainly hydro-electrically made aluminium, with a lower environmental impact than aluminium made using fossil fuel. For durability, external screws / bolts are stainless steel. The absorber coatings are semi- selective. Double glazing is UV-stable polycarbonate. Double, rather than single glazing optimises performance in winter and in windy sites. Insulation is zero-ODP pentane-blown rigid foam.

And the solar panel’s pump?

The 12 volt (peak) photovoltaic panel powers a self-regulating, variable speed, long life brushless DC motor. This drives Solartwin’s positive displacement pump. Valves in it stop “reverse thermosyphon” at night, and a bypass valve protects against frozen by dayconditions. Flexible pipes. Solartwin’s freeze-tolerant, corrosion-resistant pipes are made of silicone rubber. Its extreme temperature tolerance range is: -60C to +200C! This silicone is also used, for hygiene reasons, for milk pipes in dairies. Its material conforms to the requirements of UK-WRAS for hot water and European Extraction Testing Regs 90/129/EC (BGVV XXI) for food contact, and USA FDA 21 CFR 177.2600 for food contact.

How big is Solartwin solar water heating system’s solar heat energy output?

In wet old UK (At Latitude 52 deg north) Solartwin typically heats a normal 120 litre cylinder to 50-60C on a sunny March or Sept. day (60- 80C in summer). Independently tested, Solartwin delivered 1000 kWh (3.6 GJ) of energy as hot water a year in UK. It saves far more bought-in energy. Peak output is 1.6 kW, similar to an immersion heater.

Can using Solartwin solar panels help to stop global warming?

Yes, using Solartwin solar panels cut global warming! Solartwin can cut your yearly carbon dioxide (CO2) emissions by a quarter of a tonne if your water heating fuel is mains gas. If other fossil fuels, or electricity are saved then yearly saving can be up to a tonne or more!

Solartwin answers your solar energy questions.

We are a solar company which is here to help you – and the planet. Supplying solar for you is our business. Ask us now at hi@solartwin.com

We can ship solar panels to anywhere in the world where there is sunlight.

For example: we deliver solar thermal systems to all of UK: England, Scotland, Wales and Northern Ireland, including London, Birmingham, Manchester, Edinburgh, Belfast. Also to the The Isle of Man, the Channel Islands. Plus the Republic of Ireland (Eire) including Dublin and Cork. We also deliver to USA including New York, Washington and California. Also to Canada including Québec, and Montreal. We also deliver solar panels to India, South Africa, Australia and New Zealand.

In more detail,   we can supply Solar panels all over the world including:

Sending Solar heating systems to  Australia and Australian regions including: Sydney, Melbourne, Brisbane, Perth, Adelaide, Newcastle, Canberra, Queanbeyan, Australian Capital Territory, Wollongong, New South Wales, Victoria, Queensland, Western Australia, South Australia, Tasmania.

Delivering solar hot water systems to the realm of  New Zealand / Aotearoa regions including: Wellington, Auckland, Christchurch, Hamilton, Dunedin   · Napier-Hastings, Palmerston North, Tauranga. North Island, South Island, Stewart Island / Rakiura, Chatham Islands, Cook Islands, Niue (self-governing) Tokelau, Ross Dependency in Antarctica.

Supplying solar heating technology to  India and Indian linked areas including Andaman and Nicobar Islands, Andhra Pradesh, Arunachal Pradesh, Assam, Bihar, Chandigarh, Chhattisgarh, Dadra and Nagar Haveli, Daman and Diu, Delhi, Goa, Gujarat, Haryana, Himachal Pradesh, Jammu and Kashmir, Jharkhand, Karnataka, Kerala, Lakshadweep, Madhya Pradesh, Maharashtra, Manipur, Meghalaya, Mizoram, Nagaland, Orissa, Puducherry, Punjab, Rajasthan, Sikkim, Tamil Nadu, Tripura, Uttar Pradesh, Uttarakhand, West Bengal. Indian cities including Bombay / Mumbai, Delhi, Jaipur , Lucknow, Calcutta / Kolkata, Nagpur, Hyderabad, Indore, Bangalore, Patna, Chennai, Bhopal, Ahmedabad, Thane, Pune, Ludhiana, Surat, Visakhapatnam, Kanpur, Vijayawada.

Supplying and installing to UK Cities including in  Britain: London, Birmingham, Leeds, Glasgow, Sheffield, Bradford, Edinburgh, Liverpool, Manchester, Bristol, Wakefield, Cardiff, Coventry, Nottingham, Leicester, Sunderland, Belfast, Newcastle upon Tyne, Brighton, Hull, Plymouth, Stoke-on-Trent, Wolverhampton, Derby, Swansea, Southampton, Salford, Aberdeen, Westminster, Portsmouth, York, Peterborough, Dundee, Lancaster, Oxford, Newport, Preston, St Albans, Norwich, Chester, Cambridge, Salisbury, Exeter, Gloucester, Lisburn, Chichester, Winchester, Londonderry, Carlisle, Worcester, Bath, Durham, Lincoln, Hereford, Armagh, Inverness, Stirling, Canterbury, Lichfield, Newry, Ripon, Bangor, Truro, Ely, Wells, St Davids. United Kingdom regions and counties including: Bedfordshire, Berkshire, Buckinghamshire, Cambridgeshire, Cheshire, Cornwall, County Durham, Cumbria, Derbyshire, Devon, Dorset, East Riding of Yorkshire, East Sussex, Essex, Gloucestershire, Greater London, Greater Manchester, Hampshire, Herefordshire, Hertfordshire, Kent, Lancashire, Leicestershire, Lincolnshire, Merseyside, Norfolk, North Yorkshire, Northamptonshire, Northumberland, Nottinghamshire, Oxfordshire, Shropshire, Somerset, South Yorkshire, Staffordshire, Suffolk, Surrey, Tyne & Wear, Warwickshire, West Midlands, West Sussex, West Yorkshire, Wiltshire, Worcestershire. Lake District, The Cotswolds, New Forest, Peak District,

Installing solar panels all over wales includng in: Anglesey, Brecknockshire,Caernarfonshire, Cardiganshire, Carmarthenshire, Denbighshire, Flintshire, Glamorgan, Merioneth, Monmouthshire, Montgomeryshire,, Pembrokeshire, Radnorshire.

Supplying  Scotland with solar heating systems in Caithness, Sutherland, Ross-shire, Cromartyshire, Inverness-shire, Nairnshire, Morayshire, Banffshire, Aberdeenshire, Kincardineshire, Angus, Perthshire, Argyll, Bute, Ayrshire, Renfrewshire, Dumbartonshire, Stirlingshire, Clackmannanshire, Kinross-shire, Fife, West Lothian (Linlithgowshire), Midlothian (Edinburghshire), East Lothian (Haddingtonshire), Berwickshire, Roxburghshire, Dumfriesshire, Kirkcudbrightshire, Wigtownshire, Lanarkshire, Selkirkshire, Peeblesshire, Zetland / Shetland, Orkney.

Fittng solar panels and delivering solar DIY kits to  Northern Ireland including, Antrim, Armagh, Down, Fermanagh, Derry / Londonderry, Tyrone, Belfast Lisburn, Newry, Coleraine, Downpatrick, Ballymena.

Republic of Ireland, RoI, Eire, sending solar panels and fitting them in Dublin, Wicklow, Wexford, Carlow, Kildare, Meath, Louth, Monaghan, Cavan, Longford, Westmeath, Offaly, Laois, Kilkenny, Waterford, Cork, Kerry, Limerick, Tipperary, Clare, Galway, Mayo, Roscommon, Sligo, Leitrim, Donegal, Galway.