Arriving to my boat today l found mayhem and distraction.
The new masthead VHF areal missing, cable sticking out.

Pic.1
The switchboard panel blown to bits, the volt meter's face was on the floor, a push switch blown on the chart table, it's fuse scorched bad. Pic.2-3

The solar panel smashed to bits, Pic 4-5-6

One GPS on the chart table dead, the cockpit chart plotter, though turns on but only voltage shows everything else is dead.
Commercial radio, dead.
27mhz radio dead.
Out of the 9 new led cabin lights 4 destroyed.
All navigation lights dead bar the steaming light.
I started the engine, after checking the batteries and the switchboard, gave it a good run, it works fine, alternator charging, batteries holding charge, hot water ok.
So far that's all l found.
So l went sailing.

What might have caused this mayhem if not lightning?
