And the other months it's a not-so-strong dip in production (Jan 16%, Feb 31%, Mar 57%, Apr 94%, Jun 100%, Jul 100%, Aug 87%, Sep 60%, Okt 41%, Nov 22%, Dec 13%).
This means (for germany) we have to install more than 170% PV and store 3 months worth of energy for half a year (or install 800% and don't store anything). It's just a very rough estimation, but it's clear that one can't compare the cost of 1kWh PV to 1kWh nuclear (at least if one doesn't live in the desert).