Kyoto Group Heatcube Thermal Battery

Kyoto Group AS is a Norwegian company (Oslo, organisation number 917 001 790 per its terms of use) that offers Heatcube, a molten-salt thermal battery for industrial process heat in the 150 to 300 C range. Its stated aim is low-cost, clean heat at scale for industry.

Heatcube charges from electricity and discharges heat around the clock as steam, with over 93 percent energy efficiency and a 25-year life according to the site. It is sold as Heat-as-a-Service, where customers pay for steam used, or as an outright product. Heatcube #1 was completed in 2023 at Norbis Park and Heatcube #2 was inaugurated at KALL Ingredients in Hungary in October 2025.

• Molten-salt storage: high-temperature thermal battery for process heat.
• Temperature range: industrial heat of 150 to 300 C.
• Round-the-clock output: 24/7 steam discharge from electricity.
• Two delivery models: Heat-as-a-Service or Heat-as-a-Product.
• Reference plants: Norbis Park and KALL Ingredients in Hungary.

Steam for food ingredient and beverage plants in Vietnam. Process heat for paper and chemical mills. Heat-as-a-Service pilots that avoid upfront capital.

Energy efficiency above 93 percent and a 25-year life, per the company.

Heat-as-a-Service lets customers pay only for steam used.

Plug-and-play power-to-heat unit with 24/7 heat discharge.

Company states CO2 reduction of 2,000 to 15,000 tonnes per year.

Industrial heat in the 150 to 300 C range is a large share of demand in food, chemicals and paper and is still gas-fired in most plants. Power-to-heat storage lets plants use cheap off-peak electricity. Vietnamese and ASEAN food and paper factories use similar temperature ranges.

Kyoto Group AS, Oslo, Norway. Footer shows DNV ISO 9001 and ISO 14001 logos. Customers and partners cited include KALL Ingredients, Aalborg Forsyning, Vulcanic, Iberdrola and Steinmuller Engineering. Founding year not stated.