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:-

4 Led Light    = 4x25 = 100W

2 fan              = 2x80 = 160W

1 Tube Light = 1x40 = 40W

1 Led TV        = 1x50 = 50W

Step 2:- Inverter Battery

Consider - 500W

However, Recommendation is 800-1000W best

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

1. Of Solar panels

340W Home load (AC) = 660W Solar panel required DC

The 660w Solar panel below is available in the market.

1. 125w
2. 180w
3. 375w
4. 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)

Inverter: - 800-1000w

Battery: - 250Ah

Solar panels: - 4 X 180w

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