SMAKN&reg; 30W/5A DC Volt Converter Automatic Boost Buck Solar Charger 5-30V to 6-50V 12V Battery Regulator Modules nature: Non-synchronous rectification non-isolated Boost Buck (SEPIC) Input voltage: DC 5-30V Output voltage: DC 6-50V Input current: 4A / 5A (MAX) Power: 30W / 50W (MAX)