The mature technology platform for biomediated release and conversion to biomethane combines both carbon capture and utilization (CCU) with that of power-to-methane, where H2 produced from renewable electricity is used to reduce the captured CO2 to the biomethane. The concept is envisioned as a simple retrofit directly to flue gas sources since the process is based on a rather simple biological process. The produced biomethane can be stored or used locally or injected to the natural gas grid. The latter will, however, depend on product gas quality and available infrastructure for gas storage . Since the technology depends on renewable H2, its implementation will, however, require the presence of a full powerto-X infrastructure chain, where H2 for the CO2 reduction to methane, is supplied by water electrolysis using renewable power. This follows the current expansion of electricity production from fluctuating sources like wind turbines and photovoltaics panels. Complete use of only H2 from these fluctuating sources requires that the system can handle such intermittency and allow conversion only when renewable power from the sun and wind is available. Since the captured CO2 is solubilized in a liquid, the capturing CO2 in an amine system does in fact allow for intermittent storage of CO2 of the liquid solvent until renewable-based electricity (i.e. from solar panels) become available, at which the CO2 from the capture agent can be converted through the biomethanation reactor and the regenerated absorbent returned to the scrubber (Figure ). The capacity of the storage tank for the CO2-rich capture agent will depend on the CO2 absorption capacity of the capture agent. The sizing of the storage tank based on the potential MDEA concentration has been depicted in figure for a daily storage period of 12 hours, which would be within the load duration of a photovoltaic solar cell park 72 . binding capacity is therefore important for enabling intermittent CO2 storage. The development of a biomediated platform for biological release and conversion of CO2 from flue gasses does therefore not only represent a novel technology for bringing down the energy requirements of carbon capture but also addresses the issue of intermittency when using electricity for wind and sun for this conversion.