Storage in PV Systems; 10. 2 Battery Basics; Oxidation/Reduction Reaction; Electrochemical Potential; Nernst Equation; Basic Battery Operation; Ideal battery capacity; 10. Battery Characteristics; Battery Efficiency; Battery Capacity; Battery Charging and Discharging Parameters; Battery Lifetime and Maintenance.
Why is Battery sizing important for a grid-tied solar PV system?
The utilization of a grid-tied solar PV rooftop system may minimize the electricity bills of residential consumers. Battery storage proved to be the most expensive component of a solar PV system. Hence, optimal battery sizing for a grid-tied PV solar system is of fundamental importance to maximize investment returns.
What are the basic requirements of a solar PV module?
One of the basic requirements of the PV module is to provide sufficient voltage to charge the batteries of the different voltage levels under daily solar radiation. This implies that the module voltage should be higher to charge the batteries during the low solar radiation and high temperatures.
What are the PV module parameters?
The PV module parameters are mentioned by the manufacturers under the Standard Test Condition (STC) i.e. temperature of 25 °C and radiation of 1000 W/m2. In most of the time and locations, the conditions specified under STC does not occur.
Does a solar PV array need a battery?
Solar PV array may be configured as a stand-alone or grid-tied system. Whichever connection is selected; a battery storage system is necessary to store excess electrical energy. When a standalone system is used, a battery will ensure storage of excess energy, especially whenever a connected load demands less than the generated PV power .
What are the parameters of a solar cell under STC?
Under STC the corresponding solar radiation is equal to 1000 W/m2 and the cell operating temperature is equal to 25oC. The solar cell parameters are as follows; Short circuit current is the maximum current produced by the solar cell, it is measured in ampere (A) or milli-ampere (mA).
What is a solar photovoltaic cell?
A solar cell is a semiconductor device that can convert solar radiation into electricity. Its ability to convert sunlight into electricity without an intermediate conversion makes it unique to harness the available solar energy into useful electricity. That is why they are called Solar Photovoltaic cells. Fig. 1 shows a typical solar cell.