Solar calculation for home
Step 1:- Home electrical load calculation?
Step 2:- Inverter Selection?
Step 3:-Battery Selection?
Step 4:-Solar Panel Selection?
Step 1:-
Home Electrical Load
4 Led Light = 4x25 = 100W
2 fan = 2x80 = 160W
1 Tube Light = 1x40 = 40W
1 Led TV = 1x50 = 50W
Total Load = 350W
Step 2:- Inverter Battery
House Load: - 350W
Consider - 500W
However, Recommendation is 800-1000W best
AC load =350w
Battery DC Volt = 12V
DC current required
P = V x I
I=P/V
350W AC Load …DC current required (I) =29.17=30A
Step 3:- Battery Size Selection in AH
Formula:-W x H/V
Where: - W= Total load (350w)
H= Backup time in hours (8)
V= Battery voltage (12v)
=350X8/12=233AH
Battery Standard: - 250AH
Battery Select: - 250AH
Battery Charging Current
We will calculate charging current for 250AH battery .As we know that charging current should be 10% of the AH rating of Battery.
Therefore
Charging current for 250AH Battery
= 250X10%
= 25A
Solar panel Current =Battery charging current + Home load current
= 25+30
= 55 A
Solar plate’s power
Formula = V X I
= 12 X 55
= 660W
- Of Solar panels
340W Home load (AC) = 660W Solar panel required DC
The 660w Solar panel below is available in the market.
- 125w
- 180w
- 375w
- 440w
No. of solar plates =Total solar plates watt/single panel watts
=660/180
= 3.66 Approx. (4)
No. of solar plates:-4 panels (4x 180w)
350w home electrical load
Inverter: - 800-1000w
Battery: - 250Ah
Solar panels: - 4 X 180w
