Just got this back from Enersys. For whoever else may be interested:
Hello RH,
Thank you for contacting EnerSys/ODYSSEY.
The PC1500 series models are all the same basic battery with different terminal configurations and marketing labels. All ODYSSEY batteries are dual purpose for both cranking and deep cycling. The Marine 34M-PC1500ST is commonly used in automotive applications due to the top post dual terminal configuration for auxiliary loads.
Understand that most alternators are not meant to be deep discharge recovery chargers so monitoring of the battery to determine if external charging is required or an upgraded higher amp alternator would be beneficial. The battery can take up to 300A and prefers a charging voltage of 14.4-14.8V. If the battery’s resting voltage 8-24 hours off charge, including alternator charging, is at least 12.84V then the system is charging the battery to a full state of charge based on your usage and the amount of driving you are doing. If not, the battery will fail prematurely due to consistent undercharging or being maintained in an undercharged condition. For vehicles that are not daily drivers, parasitic loads over time can became an issue as well.
I hope this helps. Sincerely,
Kathy Mitchell
Going to monitor it and do a bit of searching on here. But I'm assuming our alternators will be ok..?