LiFePO4 and AGM bateries have a very similar charge voltage range, the big issue is once they reach a 100% charge the float voltage is different which will cause the overall capacity to reduce overtime. It is also important to change the charge mode in the Redarc Batery Manager 30 from touring to storage when not being used to maintain and support battery performance with capacity. This will change how the battery is charged, allowing for a natural discharge without any load and a recharge to its full potential capacity.