It seems to me that if the events are happening consistently at low tides, which are when the moon is on the
horizons, the most likely cause is direct gravitational pull by the moon on the
nearest tectonic plate creating a slight spread at the rift, just as a sideways pulling on skin
near a recently sutured cut can make the
area bleed.
But for a car solar roof, the
area is small and it doesn't point up towards the southern
horizon, so there's no where
near enough energy to charge the battery.