Yes that happened to us, though not from a lightning
strike. Voltage was spiking sporadically as high as 16.5V. I figured the regulator had failed and it was just operating at max. output.
When it happened we had just left Raiatea, French Polynesia
. Our short-term solution was to run a hair dryer through the inverter
to dump power! Then I disconnected it until we scrounged a replacement from a junk yard in Rarotonga. Still using that one now, 4 years later. :-)