Saudi Arabian oil firm Aramco has entered into a memorandum of understanding (MOU) with Rondo Energy, a thermal energy storage company, following an equity investment.

Energy Storage News visited the offices and production facilities of Sunamp, a maker of heat batteries, in East Lothian, Scotland to hear how the systems are made and how they were developed.

Sunamp, a Scottish manufacturer of heat batteries for domestic energy storage, including models designed to link with PV systems, has started serial production of its units from a base in the UK.