Profile: Solar Twin Ltd. manufactures and installs photovoltaic pumped solar water heating systems. We install photovoltaics for electricity production. We provide Solartwin, that can be installed direct onto an existing vented hot water system. We supply Solartwin solar heating DIY kits to plumbers, roofers, commercial / residential developers and social housing. We also offer full design and installation services for our solar panel systems on residential and commercial projects.