How do I properly charge a VRLA battery?

AI Thread Summary
Charging a Valve Regulated Lead Acid (VRLA) battery typically requires maintaining a float voltage of around 2.25 Vpc, and boosting to 2.4 Vpc is generally not necessary. If the battery discharges to 20%, it can be recharged using only the float voltage without adverse effects. The consensus is that VRLA batteries do not need equalization like flooded lead acid batteries. Manufacturer documentation can be confusing, but it is important to refer to it for specific guidelines. Overall, maintaining the recommended float voltage is sufficient for optimal battery health.
pocho
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hello, pozdrav


my question is about Valve Regulated Lead Acid battery. may i charge it only with "float" voltage (cca 2,25 Vpc) or do i have to "boost" it (2,4 Vpc) sometimes? if my battery gets discharged to 20% can i recharge it only with "float" voltage?

i have capacity cca 150Ah, 220V; temperature is ideal 20°

thank you

hvala
 
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This a pretty good white-paper on batteries. It says VRLA batteries generally do better at the recommended float voltage, and don't require "equalization" like a flooded lead acid. But I would look at the manufacturer's documentation to be sure.

http://www.apcmedia.com/salestools/SADE-5TNRJR_R2_EN.pdf
 
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thank you gtacs. this is a good resource. manufacturers documents are a bit confusing, i checked Sonnenschein and EnerSys websites.

it seems that "boost" treatment is not needed for VRLA. that is fine with me, because i had some trouble with overvoltages: boost_voltage x number_of_cells > voltage_tolerance.

thank you, have a nice day
 

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