Just a bunch of buzzwords. Is there any estimation what is the overhead to ensure reliable continuous electricity supply in microgrid? In some places even a wee

Just a bunch of buzzwords. Is there any estimation what is the overhead to ensure reliable continuous electricity supply in microgrid? In some places even a week-worth amount of energy storage is required, that means oversized batteries or fossil fuel backup generator anyway. As compared to grid that has many sources in many places and can more easily use them effectively.