This data-file derives the ‘net round trip efficiency’ of nine different battery solutions for storing energy. Rough costs are also estimated.
Net round trip efficiency is calculated as the energy efficiency of the battery (kWh recovered per kWh fed in) divided by the energy efficiency of the displaced energy source.
We see great potential in “good batteries”, for example, electrification of the vehicle fleet, which can achieve c3.5x uplifts in efficiency. We see less potential in “bad batteries”, for example, backing up the grid with hydrogen, which reduces total system efficiency by c35%.