Arduino Solar Panel Battery Charger

The arduino mcu senses the solar panel and battery voltages.

Arduino solar panel battery charger.

Most of mppt charger out there including almost all diy arduino mppt chargers are buck type that is to charge battery with lower voltage compared to your solar panel voltage. Demonstration of my arduino based solar panel charger operates. A 5v step up voltage booster is also connected to the battery and is used to convert from 3 7v dc to 5v dc. The controller uses two stages charging algorithm.

In the above picture there is typographical error in power and control signal. The amount of charging current is determined by the difference between battery voltage and charge setpoint voltages. If that is you then you have to resort to expensive genasun boost mppt charger which at usd300 a pop. Solar panel for the arduino board with battery charger.

This circuit was based on the awesome tutorial by deba168 solar powered arduino weather station. The redline is for power and yellow line is for control signal. A 5v step up voltage booster is also connected to the battery and is used to convert from 3 7v dc to 5v dc. This arduino board module equipped with a solar panel and a li ion battery can power your arduino project in two ways.

Either by connecting your arduino board to the module and the module to its solar panel. It can take up to 20v on the input site of the charger. Schematic and programming explanations in separate videos. Solar cells are connected to the input of the lithium battery charger tp4056 whose output is connected to the 18560 lithium battery.

Using the percentages calculated above this means i will have 6 7 hours of sunlight for charging time on the shortest day of the year 67 of 10 hours 6 7 hours. Calculating solar panel and battery sizes. Or by connecting the li ion battery to the solar module then the solar module to your arduino board via a pair. According to these voltages it decides how to charge the battery and control the load.

According to these voltage levels it decides how to charge the battery and control the load. Solar cells are connected to the input of the lithium battery charger tp4056 whose output is connected to the 18560 lithium battery. Furthermore the design has been tested and runs with 90 efficiency under 70ᵒc 158ᵒf. The following design is for a solar battery charger ran by an arduino nano.

The arduino senses the solar panel and battery voltages by using two voltage divider circuits.