How To Determine The AGM Current

Modified on Fri, 14 Jul, 2023 at 9:05 AM

AGM charge current should be between 0.10 and 0.15 of the 20 hour rate AH rating. So a 100 AH battery should be charged at between 10 and 15 Amps.

What settings should AGM batteries be set at?

AGM batteries are designed to require 14.6v – 14.8v when performing a full charge from a state of discharge, whereas standard lead acid batteries need 13.8v – 14.4v, hence this is what most onboard chargers are designed to deliver – not the 14.6v – 14.8v that AGM requires.

Why should AGM Batteries be fully charged?
All AGM (Absorbent Glass Mat batteries) have to be fully charged to 100% percent in order to maintain their capacity
. When you partially charge AGM batteries, they with time lose their capability to charge to full capacity.

Why does AGM Batteries drain so fast?

The reason we recommend AGM settings for lithium-ion batteries when it comes to discharge, whether you're using a car battery, AGM battery, lead-acid, or lithium battery, a decline in performance and faster discharge rate are usually caused by similar issues. These include battery age, over or undercharging, exposure to extreme temperatures, or sulfation. 

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