Coal’s winter role

Coal remains central to Poland’s winter power mix. When electricity demand surged to a record 27.6 GW in mid-January (with production at 28.9 GW), coal provided most of the output. Former deputy economy minister Jerzy Markowski argues that renewable sources are seasonal: in winter, shorter days weaken solar generation and fossil fuels stabilize the grid.

Jakub Wiech of Energetyka24 notes that renewables…