SMAKN&reg; 30W/2A DC Volt Converter Automatic Boost Buck Solar Charger 5-35V to 0.8-35V 12V Battery Regulator Modules nature: Non-synchronous rectification non-isolated Boost Buck (SEPIC) Input voltage: DC 5-35V Output voltage: DC 0.8-35V Input current: 2A / 3A (MAX) Power: 20W / 30W (MAX)