Scribd
Upload
42 views6 pages

Panel Distribution Scenarios: Figure 1 Top View of System 25kw

This document discusses several scenarios for distributing 25kW of solar panel capacity across the roof of a building. It examines different tilt angles and arrangements of panels. It then considers a system design for 20kW capacity, determining that 61 panels of 330W each are needed based on panel specifications. The document selects an inverter and determines that 21 panels, 20 panels, and 20 panels can be connected in series as strings within the inverter's voltage and current limits. It notes that two strings may need to be connected in parallel using a Y connector if the string voltages exceed limits while keeping the current under limits.

Uploaded by

mohd
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
42 views6 pages

Panel Distribution Scenarios: Figure 1 Top View of System 25kw

This document discusses several scenarios for distributing 25kW of solar panel capacity across the roof of a building. It examines different tilt angles and arrangements of panels. It then considers a system design for 20kW capacity, determining that 61 panels of 330W each are needed based on panel specifications. The document selects an inverter and determines that 21 panels, 20 panels, and 20 panels can be connected in series as strings within the inverter's voltage and current limits. It notes that two strings may need to be connected in parallel using a Y connector if the string voltages exceed limits while keeping the current under limits.

Uploaded by

mohd
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
You are on page 1/ 6

Panel Distribution Scenarios

There is a significant software that used to accommodate the available area to met the
targeted demand. This software helps to study the shading effect in course of year. Here are
more than one scenario to distribute 25kw capacity at the roof of building. Variety of tilt angels
are set to investigate the appropriate form.

Figure 1 top view of system 25kw


Figure 2 view of the Hight of this scenario

Figure 3 15 telt angle scenario, less high


Figure 4 top view of the scenario of 15 tilt angle

Figure 5 scenario of only 3 cascaded panels 25 tilt angle


Figure 6scenario of only 3 cascaded panels 10 tilt angle

Let’s consider a system of capacity 20KW. In the following, full design and sizing are
introduced in detail to perform as much as possible of suitable selection. According to the data
sheet of the selected panel,61 panels of 330W are needed.

The number of strings, panels connected in series, is determined according to the


selected inverter. In this case the selected inverter is PIKO 20:

 Max input voltage 1000V


 MPP range:
 Min rated voltage in symmetrical is 345/345/345, in unsymmetrical 450/450/ 250.
 Maximum rated voltage 800V.
 Maximum input current in symmetrical, 20/20/20, un symmetrical 20/20/20.
 MPPT (3), DC input (3).

The suitable string panels as 21/20/20.


the open circuit voltage at string 21 is 963, at string 20 is 918, both within the limit. The current
in series string is the same current of individual panel, 8.86 A dose not exceed 20 A.

The string current is the current of on panel so if we connect two string in parallel the input
current will be the some of the two currents. The need to connect to strings in parallel is
required when the voltage of the strings exceed the limits. In this case we use the Y connecter
to extra input to the inverter taking into consideration the limits of input current in symmetrical
and unsymmetrical string distribution.
Figure 7 view of Y connecter

You might also like