HEAT battery pioneer Sunamp has achieved a breakthrough in the Chinese market which it expects to result in a multi-million pound boost to sales.

East Lothian-based Sunamp has signed an agreement to work with distribution company Thumos to grow sales of its batteries in China. The batteries can be used to store energy so it can be released when needed, for heating, cooling and for hot water.

Sunamp said the agreement is expected to lead to £50 million in sales for the company over the next five years and to the establishment of a factory to manufacture its products in China.

It said the partners have already committed to work together to roll out 400 heat batteries into high-end apartments in Shanghai and into a large pipeline of projects across China.

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Sunamp chief executive Andrew Bissell underlined the significance of the deal, in view of the potential size of the Chinese market.

“Ahead of the United Nations climate summit, China’s State Council declared the share of non-fossil fuels in the country’s energy consumption will increase to 25 per cent by 2030, that’s nine percentage points higher than it was in 2020,” said Mr Bissell.

“Our products have a role to play in that transition by increasing the efficiency of renewables.”

Sunamp’s batteries could be used to store the weather-dependent output of windfarms and the like.

The company has won business in 17 countries, including orders for small installations in China, and recently opened its first factory under licence in Korea. It has won backing from overseas players including Japanese utility Osaka Gas.

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Mr Bissell started developing Sunamp in 2005, after the Voxar medical imaging business he span out of the University of Edinburgh was sold to Belgium’s Barco for £23m.

A leading US technology entrepreneur, Hank Torbert, became chairman of Sunamp in May.

The company achieved £5m turnover last year. It employs around 55 people.