The need for electric energy consumption is increasing. So, in search of new energy sources should meet the requirement that is generating a large amount of energy, economic costs, and no negative impact on the environment. One such energy source is solar energy. By using solar panels, solar energy can be converted into electrical energy. The use of solar panels as a source of electrical energy in the power bank, facilitate the charging of batteries when outside the room or when there is no source of electricity. In this experiment experiments using 5volt solar panels that function as a power source, 5000 mAh battery, and microcontroller ATMega 328 that serves as an output that displays the battery indicator through the LCD. This solar panel device becomes more economical and can be developed again by using components that have more power. Test results using 2 pieces of mobile phone can charge for 1 hour and successfully charge the battery of 26% and 22% respectively. With a fully loaded 5000 mAh battery capacity. Charge the battery by drying the power of the solar panel under the hot sun from 9 am to 3 pm.
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