A PV system that used an inverter with Nominal DC Voltage/ Maximum DCVoltage (720 VDC/900 VDC), 2 ×MPPT (2 × 10A). The exist PV Panel (Voc =40V, Is = 9A). Design the PV Array? What is the best Altitude and Azimuthpanel angles for best annual performance in Baghdad, Iraq.

To design the PV array, we need to consider the specifications of the inverter and the PV panel.

1. Determine the number of panels in series (Ns):

   • The maximum DC voltage of the inverter is 900 VDC.
   • The open circuit voltage (Voc) of the PV panel is 40V.
   • Divide the maximum DC voltage of the inverter by the Voc of the PV panel to get the number of panels in series: Ns = 900 VDC / 40V = 22.5.
   • Round up to the nearest whole number: Ns = 23.

2. Determine the number of panels in parallel (Np):

   • The maximum DC current of the inverter is 10A.
   • The short circuit current (Is) of the PV panel is 9A.
   • Divide the maximum DC current of the inverter by the Is of the PV panel to get the number of panels in parallel: Np = 10A / 9A = 1.11.
   • Round up to the nearest whole number: Np = 2.

3. Calculate the total number of panels (Nt):

   • Multiply the number of panels in series (Ns) by the number of panels in parallel (Np): Nt = 23 x 2 = 46.

Therefore, the PV array should consist of 46 PV panels.

To determine the best altitude and azimuth panel angles for the best annual performance in Baghdad, Iraq, we need to consider the solar position and irradiance data for the location.

1. Altitude panel angle:

   • The altitude angle represents the tilt of the PV panels with respect to the horizontal plane.
   • In Baghdad, the optimal altitude angle is typically around 30-35 degrees to maximize annual energy production.
   • Adjust the altitude angle based on the specific requirements and constraints of the installation site.

2. Azimuth panel angle:

   • The azimuth angle represents the orientation of the PV panels with respect to true north.
   • In Baghdad, the optimal azimuth angle is typically around 180 degrees (south-facing) to maximize annual energy production.
   • Adjust the azimuth angle based on the specific requirements and constraints of the installation site.

It is important to note that these optimal angles may vary depending on factors such as shading, local climate conditions, and specific energy production goals.