Solar battery
Introduction
DEEP CYCLE BATTERIES FOR SOLAR POWER SYSTEMS
Solar Batteries (Deep Cycle Solar Batteries) are a key component in a stand-alone renewable energy system—whether the solar system is off-grid or the battery bank is used for backup in case of electrical grid failure. If you are installing a wind, solar panel or hydroelectric system that will be tied to your utility grid, you will still need deep cycle batteries if you are trying to use power in the event of an outage. Without deep cycle batteries, you can only use power at the time you produce it (i.e. you will not have power when the sun isn't out if you don't have batteries in your solar electric system).
In renewable energy systems, deep cycle batteries provide the energy storage for your system. Unlike your car battery, deep cycle batteries that are used in renewable energy applications are meant to be discharged and recharged (cycled) repeatedly. To maintain healthy batteries and prolong battery life, most manufacturers suggest limiting the depth of discharge (DoD) to about 20%. (That means that deep cycle batteries should always have a State of Charge (SoC) of 80% or greater.) At the very least, do not allow the batteries to be discharged below 50% Depth of Discharge (DOD). Often an inverter will have a Low Voltage Disconnect feature that will disconnect loads at a given "set point." Low voltage alarms can provide audible warnings as well. Ammeters, Voltmeters, Battery Monitors can help better maintain deep cycle battery health, and provide statistics about the overall health of the system.
Advantagae
A big part of the reason that solar batteries are increasing in popularity is that they allow many homeowners greater control over their home energy usage. This means they have the chance to save money and rely less on grid-supplied energy, which tends to come from less environmentally friendly sources
Application
Backup power
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