Environmental Engineering Reference
In-Depth Information
Figure 4.16
Influence of the Series Resistance
R
S
on the I-V Characteristics of
a Solar Cell
Kirchhoff's nodal law, 0 =
I
Ph
-
I
D
-
I
P
-
I
with
,
provides the equation for the I-V characteristics of
the extended solar cell equivalent circuit:
(4.35)
This implicit equation cannot be solved as easily as Equation (4.34) for the
current
I
or voltage
V
. Numerical methods are therefore needed.
One common method for solving this equation is by so-called root finding
methods, estimating solutions at which the above equation is zero. What will
be described here is the Newton method. The I-V characteristic of the solar
Figure 4.17
Influence of the Parallel Resistance
R
P
on the I-V Characteristics
of a Solar Cell
