Lead acid batteries are one of the oldest and most common battery technologies and are made up of three basic parts: a negative electrode, a positive electrode, and an electrolyte. The most common type of batteries used in solar PV applications are maintenance free “lead acid batteries” as this type of battery is the most cost effective for home energy storage. Although similar to ordinary car batteries, deep cycle batteries used in solar power systems are especially designed for the type of charging and discharging cycles they need to endure. In this tutorial about “deep cycle batteries”, we are mainly interested in true deep cycle batteries which are ideal storage devices for solar energy systems and can be characterised (in addition to their ability to be recharged) by high power density, high discharge rate, flat discharge curves, and good low-temperature performance.īut not all secondary batteries are the same, there are many different types of batteries available, with each type designed for a specific applications. In other words, primary batteries such as those small alkaline power batteries used in remote controls or cameras can only be discharged or used once and are then discarded (thrown away) polluting the environment, while secondary batteries called “rechargeable’s” such as NiCad or Lithium Ion batteries used in laptops etc, can be discharged and recharged many times over and are therefore much kinder to the environment. In the world of batteries, Deep Cycle Batteries are classed as “secondary batteries” because they can be continuously charged-up and discharged producing what is know as the batteries charging cycle.ĭeep cycle batteries are called secondary batteries because the chemical reaction that produces and stores the electrical energy on its lead plates is fully reversible, as opposed to standard “primary batteries” that can only be used once and then thrown away once they are fully discharged. Then we can define a battery for use in a solar power system as a collection of cells which store electrical energy in the form of chemical reactions. ![]() Battery cells allow this electrical energy to be converted into chemical energy, stored within the cell, which is then converted back into electrical energy as needed.Ī battery consists of one or more of these cells, electrically connected together in series or parallel, or both, depending on the required output voltage and amperage. Then storage batteries are an essential part of any stand alone or grid-tied alternative energy installation and which themselves can determine the DC operating voltage of the whole photovoltaic solar system.ĭeep Cycle Batteries consist of a collection of individual smaller 2-volt cells which store the electrical energy produced by the PV panels that are not immediately consumed by the load. The photovoltaics charge these deep cycle batteries during the daylight hours so that you can have electricity at night or on cloudy days. Stand alone (off-grid) and battery backup grid connected PV systems require a single battery or a group of Deep Cycle Batteries called a “battery bank” wired together to store the generated solar energy. Photovoltaic solar panels produce electricity whenever the sun shines on them. ![]() Deep Cycle Batteries Deep Cycle Solar Batteries for your Solar Power Systems
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