Safe to say that post 2014 (and even earlier) the renewables have become a serious competition to the traditional part of the XLE sector(coal/gas/oil).
Crucial note: Breaking of the black trendline, could symbolize the start of a recession as this would mean that inflation expectation have decreased.
In any case, this is just a brief analysis, everything is on the chart. There's really not much to say, XLE hasn't performed well in the last 5 years(blue text) compared to other sectors.
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Full Disclosure: This is just an opinion, you decide what to do with your own money. For any further references- contact me.