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Battery storage
Energy One Ltd
By Mathy Mpassy Isinki
Off Grid Energy Solutions Business andTechnical Sales Professional
Battery anatomy:lead plateselectrolyte insulator, preventing short circuitsbetween the platesnegative postpositive post
Batteries used in most off-grid renewableenergy systems are deep-cycle; flooded orsealed lead-acid batteries.
Lead-acid batteries convert electricalenergy into chemical energy when theyare charged. When discharging chemicalenergy is converted back into electricity.
Unlike flooded batteries, sealed batteriesare filled withelectrolyte at the factory, charged, andthen permanently sealed.
Two types of sealed batteries areavailable:
absorbed glass mat (AGM) batteriesand;gel cell batteries.
Sealed batteries are also known as“maintenance-free” batteries:
because fluid levels never need to bechecked; and because the batteries never needto be filled with water.
Sealed batteries advantages over floodedlead-acid batteries:
charge fasterdo not release explosive gases,much more tolerant of lowtemperatures.
Flooded lead-acid advantage over sealedbatteries:
less more expensive;store more electricity;have longer lifespan and;can be rejuvenated (equalized).
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