I wouldn't fit it up full... as std an AGM should be able to be mounted upside down.... effectively DRY !
my view / experience is the absorbed matting needs to be damp enough to be conductive, when bone dry it doesn't work and I should think can allow oxidisation which kills the battery… by adding a small amount of distilled water the matting swells up and starts doing its job.
after my experience on the other AGM battery and the time to soak in, I had planned to put in enough so you couldn't syringe liquid out (end touching the plates.... I'd extended it using a WD40 straw) then wait 30 mins and add 10ml each for good measure…. but the odyssey needed so much... I got a bit board and I decided was so dry and knowing its seems to take a while to absorb and this might take days... I actually left about 30ml more per cell than you could syringe out when I rechecked 12hrs later
my view / experience is the absorbed matting needs to be damp enough to be conductive, when bone dry it doesn't work and I should think can allow oxidisation which kills the battery… by adding a small amount of distilled water the matting swells up and starts doing its job.
after my experience on the other AGM battery and the time to soak in, I had planned to put in enough so you couldn't syringe liquid out (end touching the plates.... I'd extended it using a WD40 straw) then wait 30 mins and add 10ml each for good measure…. but the odyssey needed so much... I got a bit board and I decided was so dry and knowing its seems to take a while to absorb and this might take days... I actually left about 30ml more per cell than you could syringe out when I rechecked 12hrs later