It is also designed for charging 12V/24V Lead-Acid batteries,including lithium and other equipment, please do pair thecharging with a solar regulator to protect the battery system from over charging.You can add more panels together with MC4 Y connectors to get a different output: Voltages are additive when Panels areconnected directly in series, and the currents are additive when panels are connected directly in parallel.Only panels with similar electrical output should be connectedin the same string to avoid mismatch effects.