The maximum power point (MPP)
Solar can work in a wide range of voltages and currents. By the irradiation by the resistive load on the battery from zero (a short circuit event) continues to increase the value of high (open event), may determine MPP.MPP is V x I reaches the maximum operating point, and in this irradiation intensity can achieve maximum online offline ups. Output short circuit power is zero (PV voltage is zero) or open (PV current is zero) when the event.
High-quality single crystal silicon solar cells at a temperature of 25 ° C, can produce 0.60 volts open circuit voltage. In full sunlight and air temperature of 25 ° C, the temperature of a given cell may be close to 45 ° C, which makes the open circuit voltage drops to about 0.55V. As the temperature increases, the open circuit voltage continued to decline until the PV Short circuit module.
Cell temperature of 45 ° C when the maximum Rack mount ups is usually produced under the conditions of 80% and 90% of the open circuit voltage short circuit current. Battery short-circuit current is almost proportional to the intensity of illumination, while the brightness decreases to 80% when the open-circuit voltage can be reduced only by 10%. Lower quality in the case of the battery voltage decreases the current increases faster, so that the available power output from 70% to 50% or even 25%.
Solar can work in a wide range of voltages and currents. By the irradiation by the resistive load on the battery from zero (a short circuit event) continues to increase the value of high (open event), may determine MPP.MPP is V x I reaches the maximum operating point, and in this irradiation intensity can achieve maximum online offline ups. Output short circuit power is zero (PV voltage is zero) or open (PV current is zero) when the event.
High-quality single crystal silicon solar cells at a temperature of 25 ° C, can produce 0.60 volts open circuit voltage. In full sunlight and air temperature of 25 ° C, the temperature of a given cell may be close to 45 ° C, which makes the open circuit voltage drops to about 0.55V. As the temperature increases, the open circuit voltage continued to decline until the PV Short circuit module.
Cell temperature of 45 ° C when the maximum Rack mount ups is usually produced under the conditions of 80% and 90% of the open circuit voltage short circuit current. Battery short-circuit current is almost proportional to the intensity of illumination, while the brightness decreases to 80% when the open-circuit voltage can be reduced only by 10%. Lower quality in the case of the battery voltage decreases the current increases faster, so that the available power output from 70% to 50% or even 25%.
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