![]() ![]() If a controller does not stop overcharging, the batteries can be damaged during times of low or no load usage or long periods of full sun.įor these reasons, battery systems must be sized to match the load. If a charge controller is not included in the system, oversized loads or excessive use can drain the batteries' charge to the point where they are damaged and must be replaced. No single component in a photovoltaic (PV) system is more affected by the size and usage of the load than storage batteries. The batteries must not be completely discharged during each cycle. The interval which includes one period of charging and one of discharging is described as a "cycle." Ideally, the batteries are recharged to 100 % capacity during the charging phase of each cycle. ![]() ![]() But if the load exceeds the array output during the day, the batteries can supplement the energy supplied by the modules. Normally, batteries are discharged during the night or cloudy weather. Most of the information at this wiki page on batteries for solar systems is taken from: Polar Power Inc., except for the paragraphs on nickel iron batteries and recycling and otherwise indicated paragraphs.īatteries store the electrical energy generated by the modules during sunny periods, and deliver it whenever the modules cannot supply power. 7 Recycling of Batteries of Photovoltaic (PV) Systems.5 Chosing a Battery for a Solar Home System (SHS).4.3.2 Sealed Flooded (Wet) Lead Acid Batteries.4.3.1.4 State of Charge, Specific Gravity and Voltage. ![]()
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