![]() ![]() ![]() Here’s a comprehensive guide to flooded lead acid batteries for comparison. For all the advantages you get with AGM over flooded lead acid they are naturally, more expensive. Flooded lead acid gives you 50% of usable energy.ĪGM batteries can be installed in any orientation whereas flooded lead acid batteries can only be fitted upright.ĪGM is also a lighter battery and charges up to 5 times faster than flooded lead acid. 50% is still recommended to prolong the battery life, however. AGM batteries are less prone to sulfation and thus don’t need an equalizing charge.īecause an AGM battery traps almost all the electrolyte inside the battery, it provides more usable energy. Sulfation is a chemical process that reduces a batteries capacity. Hydrogen in an enclosed area is combustive.įlooded lead acid batteries need an equalizing charge to prevent sulfation. This makes them a safer battery than flooded lead acid. Since they release less hydrogen, they don’t need as much ventilation. ![]() It releases hydrogen, though far less than flooded lead acid, through valves. AGM batteries don’t lose water which means there’s no need for you to replace it.ĪGM is a valve-regulated battery. Flooded lead acid batteries lose water through normal use. The key difference between AGM and flooded lead acid is maintenance. 12V 90Ah AGM Battery: Source Victron AGM vs flooded lead acid batteries This is because the batteries have a fiberglass mesh that contains the electrolyte and separates the battery plates. Shallow cycle batteries like car batteries give you less energy, typically only 20%.ĪGM stands for Absorbent Glass Mat. In a deep cycle battery, you can use more of the battery’s energy, up to 50% for AGM. What is an AGM battery?ĪGM batteries are deep cycle batteries. AGM Batteries: The Cheap, Maintenance Free Solar BatteryĪGM Batteries: The Cheap, Maintenance Free Solar BatteryĪGM batteries became popular in the early 1980s as a battery for military aircraft, because they were lighter and more reliable than flooded lead acid batteries. ![]()
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