A key enabling technology for this is long term thermal storage, which I've been emphasizing here. It is claimed to work on a scale of ~100 kW or higher, storing heat at 600 C with losses less than 1% per month and capex of $0.10 per kWh-th of storage capacity. This is very well suited for isolated microgrids.

Thats terrific! The plug-and-play layer of storage is plug-in batteries (as an extension of plug-in solar: if you can supply power from solar, you can also supply from batteries)

The first layer is storage is EVs, which is inevitable. EVs have humongous batteries.

Next layer, add thermal storage.