The key innovation of the solution is Sunamp thermal batteries use phase change materials (PCM) to store energy for domestic hot water, heating, steam, and cooling applications. Giving more technical information about the technology, melting, and freezing a PCM can stores 3-4 times as much energy in latent heat as the sensible heat of water in a typical thermal storage (i.e., thermal buffering) applications. Sunamp batteries can be filled with a wide range of PCM as appropriate to the application requirement. This means that in practice Sunamp technology is an integrator technology allowing the cross-vector applications as outlined in the diagram. The benefits of this to the energy system is as follows: • Demand shifting to support electricity and gas grid networks (in the future hydrogen) providing resilience. • Capturing surplus (grid & on-site) renewable electricity generation – decoupling generation from demand. • Capturing waste heat thereby improving overall energy efficiency. • Improving the resilience of the industrial & commercial processes to blackouts. In comparison with conventional commercial electrical storage, the Sunamp have the following advantages: a) Lifespan tested for over 40.000 cycles (50 years when cycled 2 times/day). b) Sunamp batteries can be charged from multiple thermal sources including boilers, heat pumps, waste heat, electricity (grid or embedded), steam, glycol/water, thermal solar panels and recovered heat, chillers. c) At least 2.5 times cheaper than an electric battery. d) Non-flammable substances in the PCM composition. e) Non-toxic substances in the PCM composition. f) Derived from sustainable supply chains.