In this tutorial, we are going to learn about Calculate Solar Power for Home Appliances.
Here we are taking example of 300W solar system calculation:
Suppose that we have below items in our home for daily uses then we will calculate the power accordingly.
2 Fan which have power of 80W for each then total power will be = 2×80 = 160W
2 Energy saver which have power of 20W for each then total power will be = 2×25 = 50W
1 Led TV which have power of 50W for each then total power will be = 1×50 = 50W
1 Tube Light which have power of 40W for each then total power will be = 1×40 = 40W
Now total power is = 2 Fan 180W +2 Energy Saver 50 W+ 1 Led TV 50W + 1 Tube Light = 300W
For Solar System we need below items:
- UPS/ Inverter =?
- Battery = (?)
- Solar Plates =?
300W solar system calculation: Load = 300W
UPS / Inverter = 500- 1000 W
Power = Voltage X Current
P = VXI
300 = 12XI
I = 300/12 = 25A
Battery Size in AH = W X H / V
Total Load X back up time in hours / Battery Voltage
For 8 Hours back up time
300 X 8 / 12 = 200 AH
For 4 hours back Time
300 X 4 / 12 = 100 AH
Battery Charging current = 1/10TH of batter rating.
= 200/10 = 20A
Solar Plate current = Input Current + Battery Current
Now Solar Plate = 25A + 20 A = 45A
Total Solar Current = 45A
Now we will calculate the solar plate power = V X I
Maximum Solar plate voltage = 14V
Then Solar Plate Power = 45 X 14 = 630W
Solar Plates = 630/150 = 4.2
It means we need total 4 solar plates for this load.