(b)
(c)
15.5
(a)
(b)
(c)
What is the short circuit current of the PV module?
Now assume that two solar cells are damaged, meaning that they completely stop generating power.
Fortunately, bypass diodes are connected across these damaged solar cells. Assume that the bypass
diodes are ideal (they have a zero voltage drop when conducting). What is the measured open circuit
voltage (in V) of the above PV module with the two damaged solar cells?
Consider a PV module made up of 40 cells in series, of which 20 solar cells are shaded 30% of their area and
10 solar cells are shaded 60% of their area. Each individual cell has a V oc of 0.68 V and I sc of 6 A. Assume that
each solar cell in the module has its own bypass diode with a constant forward voltage of 10 mV. Also assume
that there is no leakage current from the bypass diodes and the module temperature is 25 °C.
Draw I-V curves of this module. Indicate specific (x,y) intercepts and necessary numbers in the curves.
Calculate the total power loss from the bypass diodes.
For the same module and conditions as above, if the breakdown voltage of a shaded solar cell is 12 V,
what will be the maximum number of solar cells that can be connected in series with one bypass diode?
(c)
15.5
(a)
(b)
(c)
What is the short circuit current of the PV module?
Now assume that two solar cells are damaged, meaning that they completely stop generating power.
Fortunately, bypass diodes are connected across these damaged solar cells. Assume that the bypass
diodes are ideal (they have a zero voltage drop when conducting). What is the measured open circuit
voltage (in V) of the above PV module with the two damaged solar cells?
Consider a PV module made up of 40 cells in series, of which 20 solar cells are shaded 30% of their area and
10 solar cells are shaded 60% of their area. Each individual cell has a V oc of 0.68 V and I sc of 6 A. Assume that
each solar cell in the module has its own bypass diode with a constant forward voltage of 10 mV. Also assume
that there is no leakage current from the bypass diodes and the module temperature is 25 °C.
Draw I-V curves of this module. Indicate specific (x,y) intercepts and necessary numbers in the curves.
Calculate the total power loss from the bypass diodes.
For the same module and conditions as above, if the breakdown voltage of a shaded solar cell is 12 V,
what will be the maximum number of solar cells that can be connected in series with one bypass diode?