Nowadays, battery becomes widely used in various matters and there are several types of batteries available today, such as rechargeable and non-rechargeable. One of rechargeable types is lead acid and li-ion batteries. This study designed a software and a hardware design to control the charging of lead acid and li-ion batteries. The selected lead acid batteries was operated with a capacity of 35 Ah 12 V and li-ion 3.4 Ah 3.7 V in three series connections. The energy source selected to charge the battery obtained from sunlight converted into electrical energy by solar panels. To charge lead acid batteries, two 100 wp solar panels were operated, while it required only one 100 wp solar panel to charge li-ion batteries. This battery charging microcontroller was PIC16F877A which run to read data and control the current of battery charging. To avoid fluctuation in the current, integral proportional controller was implemented with Kp 5 and Ki 1.5. The current to charge the lead acid battery was 3,6 A while the li-ion battery required 1 A. The MOSFET driver selected was the IR2110 IC High Side Switch to drive the MOSFET IRF540N. The buck converter was used to reduce the voltage of the solar panels supplied to the battery. 16x2 LCD was prepared as a display of battery type, battery voltage, battery current and battery temperature. If the battery was full, the charging would automatically be stopped. The test results indicated that the lead acid charging time was 10 hours and the li-ion was 3 hours 20 minutes.