FAQ
FAQ
What is the better DC string voltage to be the rated voltage of the inverter?
Theoretically it is close to the MPPT maximum voltage.
Inverter DC input, can I count on the rated voltage of the module?
It can be calculated in accordance with the provisions of the PV power station design specification ‘GB50797’. That is, it is necessary to meet the calculation according to the open circuit voltage of the module (the maximum number of connected modules per string), and it is also necessary to meet the calculation according to the working voltage of the module (according to the MPPT efficiency of the inverter). Specific can be decided in accordance with the actual situation.
What is the difference between maximum short-circuit current and maximum input current?
The maximum allowable current measured by shorting the positive and negative terminals is the maximum short-circuit current, and the maximum operating current refers to the maximum output current value that allows the string to operate.
What size circuit breaker to use for a 50kW inverter?
The maximum output current of the 50kW inverter is 80A, the circuit breaker can be designed for 80A * 1.25 times the value of 100A.
What is the reason why the one with more string blocks does not draw as much current as the one with fewer string blocks?
Under the same conditions, the number of components increases, the voltage is superimposed, and the current remains unchanged. Possible causes of this anomaly: string mismatch (inconsistent model, inconsistent attenuation, inconsistent line loss, shadow masking, etc.).
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