Thermal Energy Storage (TES) isn't electron sexy, but it is reliably cool.
Thermal Energy Storage (TES) has been around for years. When compressor based HVAC systems were first applied they were not large enough to cool large venues. Motion picture theaters and houses of worship would use thermal storage by creating and storing cooling all week for the weekends' activities. As HVAC systems became commonplace, the utility load factor in North America steadily lowered to under 50% today. Connecting net zero buildings made the load factor even worse while reducing the financial health of a traditional utility company.
HVAC is the largest contributor to low load electricity generation load factors, but the good news is the cooling load is the easiest electric load to shift off peak. Today's TES systems have been steadily improved over the last thirty years and can be counted on to last over 30 years reliably. Packaged systems are available for light commercial and large commercial systems and can be applied across a broad market ranging from small churches to large campuses. TES stores energy in the form it will be used with little or no cycle degradation and most systems upon end of life can be easily refurbished, repurposed or recycled. TES is easily and quickly dispatchable during peak summer days as well.
Building designs that contain electron energy storage, thermal energy storage and renewable generation will be leading the way in value, low cost operation and occupant productivity.
Don't dismiss thermal energy storage as part of the grid resiliency solution.