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السبت، 3 ديسمبر 2016

Calculate Size of Solar Panel and Inverter



Calculate Size of Solar Panel, No of Solar Panel and Size of Inverter for following Electrical Load
Electrical Load Detail:
  • 1 No’s of 100W Computer use for 8 Hours/Day
  • 2 No’s of 60W Fan use for 8 Hours/Day
  • 1 No’s of 100W CFL Light use for 8 Hours/Day
Solar System Detail:
  • Solar System Voltage (As per Battery Bank) = 48V DC
  • Loose Wiring Connection Factor = 20%
  • Daily Sunshine Hour in Summer = 6 Hours/Day
  • Daily Sunshine Hour in Winter = 4.5 Hours/Day
  • Daily Sunshine Hour in Monsoon = 4 Hours/Day
Inverter Detail:
  • Future Load Expansion Factor = 10%
  • Inverter Efficiency = 80%
  • Inverter Power Factor =0.8

Calculation:

Step-1: Calculate Electrical Usages per Day
  • Power Consumption for Computer = No x Watt x Use Hours/Day
  • Power Consumption for Computer = 1x100x8 =800 Watt Hr/Day
  • Power Consumption for Fan = No x Watt x Use Hours/Day
  • Power Consumption for Fan = 2x60x8 = 960 Watt Hr/Day
  • Power Consumption for CFL Light = No x Watt x Use Hours/Day
  • Power Consumption for CFL Light = 1x100x8 = 800 Watt Hr/Day
  • Total Electrical Load = 800+960+800 =2560 Watt Hr/Day
Step-2: Calculate Solar Panel Size
  • Average Sunshine Hours = Daily Sunshine Hour in Summer+ Winter+ Monsoon /3
  • Average Sunshine Hours = 6+4.5+4 / 3 =8 Hours
  • Total Electrical Load =2560 Watt Hr/Day
  • Required Size of Solar Panel = (Electrical Load / Avg. Sunshine) X Correction Factor
  • Required Size of Solar Panel =(2560 / 4.8) x 1.2 = 635.6 Watt
  • Required Size of Solar Panel = 635.6 Watt
Step-3: Calculate No of Solar Panel / Array of Solar Panel
If we Use 250 Watt, 24V Solar Panel in Series-Parallel Type Connection
  • In Series-Parallel Connection Both Capacity (watt) and Volt are increases
  • No of String of Solar Panel (Watt) = Size of Solar Panel / Capacity of Each Panel
  • No of String of Solar Panel ( Watt) = 635.6 / 250 = 2.5 No’s Say 3 No’s
  • No of Solar Panel in Each String= Solar System Volt / Each Solar Panel Volt
  • No of Solar Panel in Each String= 48/24 =2 No’s
  • Total No of Solar Panel = No of String of Solar Panel x No of Solar Panel in Each String
  • Total No of Solar Panel = 3×2 =6 No’s
  • Total No of Solar Panel =6 No’s
Step-4: Calculate Electrical Load:
  • Load for Computer = No x Watt
  • Load for Computer = 1×100 =100 Watt
  • Load for Fan = No x Watt
  • Load for Fan = 2×60 = 120 Watt
  • Load for CFL Light = No x Watt
  • Load for CFL Light = 1×100 = 100 Watt
  • Total Electrical Load = 100+120+100 =320 Watt
Step-5: Calculate Size of :
  • Total Electrical Load in Watt = 320 Watt
  • Total Electrical Load in VA= Watt /P.F
  • Total Electrical Load in VA =320/0.8 = 400VA
  • Size of Inverter =Total Load x Correction Factor / Efficiency
  • Size of Inverter = 320 x 1.2 / 80% =440 Watt
  • Size of Inverter =400 x 1.2 / 80% =600 VA
  • Size of Inverter = 440 Watt or 600 VA

Summary:

  • Required Size of Solar Panel = 635.6 Watt
  • Size of Each Solar Panel = 250 Watt. 12 V
  • No of String of Solar Panel = 3 No’s
  • No of Solar Panel in Each String = 2 No’s
  • Total No of Solar Panel =6 No’s
  • Total Size of Solar Panel = 750 Watt
  • Size of Inverter = 440 watt or 600 VA

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