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Solar Panel Installation Guide

 


In this post we will discuss the calculation of  following items for installation of solar invertor System in your Home.

1.  Battery (AH) required for your Home Solar system?

2. How to calculate Backup time of Your installed battery?

3. Solar Panels Required for Your home Load and Battery Charging?

Calculation of Battery (AH) required for your Home Solar system

For Calculation of battery we must know the Total load and Total time  of load  On condition.

lets consider our home load is 300W and we want to use it for 6 Hrs then the required battery rating will 

    Battery =  (Total Load) X  (Backuptime in Hrs)  / Battery V (12V)*

*We using 12V dc battery

     Battery =  (300W) X  (6 Hrs)  /  (12V) = 150AH

Calculation of Backup time of Battery

As we know from the previous topic the Formulae of Backup Time Calculation is

Backup time in Hrs = Battery Size (AH) / Total Current Draw by Load

                                  = 150AH / 40 A =  3.75Hrs  = 3 Hrs 45 Min
                                                             =.75 x 60 = 45 Min
How we will Calculate Total Current

Total Current = Home Load Current  + Battery Charging Current

                      
Home Load Current = Total Load / Voltage of battery (12V)
                                 = 300W/12 = 25A
Battery Charging is 10 time less than its total size for slow charging which is:
                                 = 150/10 = 15 A
Then Total Current Will  = 25 + 15 = 40 A

Solar Panel Required for  Load and Battery Charging

Solar Panel W = Closed Circuit Voltage x Total Current  = 14 x 40 = 560 W





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