Embedded Files
Assumption
Assumption
SOLARMAN 200W PV modules and SUNMAN 3.6 inverter are selected.
PV cell temperature range is 20 °C - 75 °C
SUNMAN Inverter Datasheet
SOLARMAN 200W PV Module Datasheet
7. to 10. are temperature coefficients.
Concept
Concept
W% Percentage of recommended operating window voltage (%)
If Vrated not given in inverter datasheet, assume W% = 70%
Vrated Rated input DC voltage that causes the inverter to operate at its maximum efficiency / Nominal PV input voltage (V)
Vmin mppt inv Minimum MPPT input voltage of the inverter (V)
Vmax mppt inv Maximum MPPT input voltage of the inverter (V)
Select "MPP voltage range" for Vmin mppt inv and Vmax mppt inv value
9.1 Calculate W%
9.1 Calculate W%
9.2 Find Ns min mppt and Ns max mppt
9.2 Find Ns min mppt and Ns max mppt
From Step 3 Maximum MPPT Voltage , Ns max mppt = 16 units
From Step 6 Minimum MPPT Voltage , Ns min mppt = 7 units
9.3 Calculate Ns rec
9.3 Calculate Ns rec
Ns rec Recommended number of PV modules in series to achieve inverter's maximum efficiency (units)
If calculation answer has decimal place, the Ns rec will be nearest integer
Exp: 7.589, Ns rec is 7 or 8 units
Must lies between Ns range ( Ns min ... Ns max ) in Step 8 Minimum Number of PV Modules Based on Inverter >> 8.2 Ns range
When number of PV modules in series is is 12 or 13 units. inverter achieve its maximum efficiency.
Reference
Reference
Design And Sizing of Grid-Connected Photovoltaic Power System - SEDA Malaysia- 4th Published 2023
Example 4.10
SEDA GCPV Tutorial Design - Nov 2024
2. Sizing with string or central inverter - Question 3
2. Sizing with string or central inverter - Question 4
2. Sizing with string or central inverter - Question 5
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