solar pv cell output voltage in matlab

main.m
% Define solar cell parameters
Ns = 36; % Number of cells in series
Tc = 25; % Cell temperature (degrees Celsius)
Isc = 8.21; % Short-circuit current (amperes)
Voc = 44.5; % Open-circuit voltage (volts)
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main.m
% Calculate ideality factor and diode saturation current
k = 1.38e-23; % Boltzmann constant
q = 1.6e-19; % Elementary charge
Fn = 0.618; % Ideality factor
Rs = 0.214; % Series resistance (ohms)
Rp = 10154; % Parallel resistance (ohms)
Iph = Isc; % Light current (amperes)
I0 = ((Fn * q * Voc) / (k * Tc))^(3) * exp(-q * (Voc / (Fn * k * Tc)));
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main.m
% Define voltage range
V = 0:0.01:Voc; % Voltage range (volts)
    
% Calculate diode current and light current
I = zeros(size(V));
for i = 1:length(V)
    I(i) = I0 * (exp((q * V(i)) / (Fn * k * Tc)) - 1) + Iph * (1 - exp(-q * V(i) / (k * Tc)));
end

% Calculate current density
J = I ./ (Ns * 0.01);
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main.m
% Calculate output voltage
for i = 1:length(V)
    if J(i) >= 0 && J(i+1) < 0 % Find zero current crossing
        Voc = V(i) - (J(i) / (J(i+1) - J(i))) * 0.01;
        break;
    end
end
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