My SM has an AGM & has been off the tender for a couple of days now, last run yesterday. I just measured resting voltage at the tender sae connector with a Deltran USB voltmeter...it was at 12.9v resting.
AGM's tend to hold voltage a bit higher than old school wet cell, however I yet to have a wet cell - or for that matter an AGM - hold north of 13v for a long period while off charge.
Cars, boats, motorcycles, lawn tractors, scooters...
