Curious.....under charge the digital meter reads 100%.... 13.6V. At rest, fully charged....84%.....12.13V And the trailer "gauge" shows 100% What do you think?
This is a handy chart showing the DC VOLTS verses Percent of Charge readings... I always wait a few minutes to let a battery rest before making readings after being charged with higher DC voltages...
I do not put much faith in any of the Percent reading meters on the trailers... I always use a known good DC VOLTMETER to make readings with