Just to inform the discussion wrt. timescales and magnitudes of power variability, here is a real-time plot of power generation in the UK showing daily/weekly/m

Just to inform the discussion wrt. timescales and magnitudes of power variability, here is a real-time plot of power generation in the UK showing daily/weekly/monthly variations in consumption and in production from nuclear, coal, gas turbines, wind, bio and (pumped) hydroelectric. This is with zero battery storage on the grid (I believe). http://www.gridwatch.templar.co.uk http://www.gridwatch.templar.co.uk