Specific Energy is one of the single most important metrics in the entire world of energy. The chart shows the watt hours per kilogram of three of the most common battery types along with our solution. Although batteries are often touted as the answer to most energy related problems, it's important to use the right tool to solve each problem.
Blue shows the lower average with green showing the higher average for each solution. The lower end of our solution is slightly less than the higher average of Lithium ion based cells as well as significantly higher than both Lead and Nickel based cells.
Please Note: The figures shown for battery solutions are for cells only. Necessary components such as BMS and HVAC systems are not included. Also, figures for Cryo are for materials only and components such as storage vessels are not included.
Another very important metric is the amount of energy that can be stored over the usable lifetime of that solution divided by the energy required to create the solution in the first place, sometimes referred to as the Energy Stored on Investment ratio. Looking to the chart you can see the Pumped Hydro had a good ratio of nearly 200 times energy stored compared to energy required. Lithium Ion is far inferior with an average of around 10 depending on the chemistry. Our Cryo solution is not only 20 times better than Lithium Ion based batteries, but is also slightly ahead of Pumped Hydro with a ratio of approximately 225. Thermal energy systems have an inherently long service life which allows this ratio to be even higher.
Long term energy storage solutions demand a high ratio to prevent resources from being wasted on short term stop-gaps.