I'd say that you had a combination of high Coronal Mass Ejections inducing a slightly higher current and a sub optimal fuse, just enough to push that fuse over its limit. 
Space Weather Enthusiasts Dashboard | NOAA / NWS Space Weather Prediction Center
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"It broke because it wants to be Upgraded "
2012 Porsche Performance Driving School - SanDiego region
2001 Boxster S, Top Speed muffler, (Fred's) Mini Morimotto Projectors, Tarret UDP,
Short Shifter, Touch Screen Dual Din Radio, 03 4 Bow glass Top (DD & Auto-X since May 17,2012)
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1997 Porsche Boxster
2018 Porsche Macan
Hybrid Mode
