With the New 80W solar panel in hand , Decided to build proper circuitry with LCD display.
Following are the major parts used mainly purchased via ebay.
- IRF9540 P-Channel Power MOSFET
- 6x8cm Double-side Prototype PCB Universal Printed Circuit Board
- 16X2 Character LCD Module Display Blue IIC/I2C/TWI/SPI Serial Interface
- Arduino pro mini - 5V system
- IRF520 ( For swithon bulbs automatically at night)
In this setup I am using three 7AH 12V batteries connected in parallel.
Here the solar panel placed on the roof.
2 12V 7Ah lead acid batteries shown here.
The circuitry. consist with arduino , PMOSFET , 6A Diode, ACS712 current sensor module and IRF520 to switch on the bulbs (small 7W LED)
Following is the out put of the display.Top left it display the solar panel voltage. Top right it shows the battery voltage. Currnelty battery charge to it optimal level 13.5V. and it is in the floating charge state. Lower left shows the current posistive shows that it draws some current from the battery.
