Carbon280 are commercialising the Hydrilyte Hydrogen Storage System. Unlike liquified hydrogen, compressed hydrogen and ammonia, Hydrilyte is safe and non-toxic for people and the environment. We think that if hydrogen is going to replace fossil fuels then safety and non-toxicity should be the central requirement. Hydrilyte is is the most cost competitive storage solution for renewable firming. On a renewable grid, powered by wind and/or solar PV, energy storage is required to “fill the gaps” when power from generation falls below the load. This is known as “renewable firming”. Where the gaps are in the order of seconds to hours, batteries and/or super capacitors provide a cost effective and technically efficient solution. However, batteries don’t have the energy density to economically meet longer term (> 4 hour) shortfalls. Fossil fuels are typically used to cover these longer periods that may extend to many days. Hydrogen is an alternative to fossil fuels that can help to fully decarbonise electricity power grids.