A staggering 7,000 gigawatt hours of electricity were generated in that 6 month period. 10% more than the energy produced from coal during that same time (6,300 gigawatts).
The first day ever that solar energy outstripped coal was on April 9th 2016. This was mostly down to the fact that there was no coal-fired electricity for the first time since 1882, but it is still an incredible achievement to have a renewable energy source now outstripping the likes of coal. Another factor that contributed to solar outstripping coal is due to the strong sunlight seen in the summer months. It is unlikely that for the forthcoming winter months that solar will continue to be in the lead but it is a great leap in the right direction.