This intelligent compact charger uses Maximum Power Point Tracking (MPPT) for maximum efficiency and charge rate. It can charge 12V or 24V lead acid (sealed, gel, or flooded) or 12V lithium battery banks, and supports 12V solar arrays up to 390W or 24VDC arrays up to 780W. It features three stage charging including constant voltage charging and diplays real-time feedback on battery voltage, load voltage, PV voltage, time, etc. The fanless design is built into a durable case for permanent installation with heavy-duty screw terminals for cabling up to 6AWG. Safety features include over-voltage, low-voltage protection, reverse connection, short-circuit, over-current, and over-temperature protection. It can charge 12V or 24V lead acid (sealed, gel, or flooded) or 12V lithium battery banks, and supports 12V solar arrays up to 390W or 24VDC arrays up to 780W. It features three stage charging including constant voltage charging and diplays real-time feedback on battery voltage, load voltage, PV voltage, time, etc. The fanless design is built into a durable case for permanent installation with heavy-duty screw terminals for cabling up to 6AWG. Safety features include over-voltage, low-voltage protection, reverse connection, short-circuit, over-current, and over-temperature protection.