Key losses in Photovoltaic system
When there are mismatching among solar panels DC in series or photovoltaic?array, there will lead to the losses.
How to calculate these losses:
(1)According to the distribution of the current
(2)Shunt?resistor Under different radiation
(1)Use string inverter
(2)Short circuit current step
2.??? Inverter .
It includes the inverter itself losses and DC transfer to AC, the MPPT will also lead to the loss.
The inverter itself s:
(3)Power threshold loss
(5)Voltage threshold loss
Inverter also has continuous open circuit losses at night. In general ,the open circuit losses will be 0.1%, full-load losses will be 1%
Voltage fluctuation will lead to ohmic losses. So cable losses according to the actual situation. Cable loss include AC loss and OC loss:
(1)AC loss means AC output to transformer junction,
(1)DC loss means photovoltaic?array, combiner?box output to the inverter DC.