can this system be used with AGM batteries?
Yes! This system will work with wet cell or maintenance free AGM batteries. I recommend deep cycle 12V rated at a minimum 100ah or 175 reserve minutes.
Please note that the Zoeller 508 Battery Backup System does include a 1 year manufacturer warranty. If you purchase the Zoeller 10-1450 - Aquanot 12V Deep Cycle 72AH AGM Battery or the Zoeller 10-0761 - Aquanot 12V Deep Cycle 83AH Wet Battery at time of purchase, that warranty is extended by 2 years to a THREE year manufacturer warranty.
If you have any other questions, please let me know.