Solar MPPT charge controller

This design is a 20A maximum power point tracking (MPPT) solar charge controller designed for solar panel input corresponding to 12V and 24V panels. This design is intended for small to medium power solar charger solutions, capable of operating from 12V/24V panels and 12V/24V batteries with output currents up to 20A. This design focuses on scalability and can easily be adapted to a 48V system by changing the MOSFETs to 100V rated parts. The user can also increase the current to 40A by using a TO-220 package version of the current MOSFET. This solar MPPT charge controller is designed with real-world considerations in mind, including reverse battery protection and software-programmable alarms and indications that are provided in the hardware but not configured. This design operates at greater than 97% efficiency at full load in a 24V system. For a 12V system, the efficiency is greater than 96%, which includes losses in the reverse-battery protection MOSFET.

characteristic

• ● Efficiency greater than 96% at full load in 12V and 24V systems
• ● Supports wide input voltage range: 15VDC - 44VDC
• ● Flexible design, supports 12V or 24V solar panels
• ●Output current: maximum 20A
• ● Small circuit board form factor: 130 mm x 84 mm x 22 mm