This recharging controller can be used with solar panels( the solar panel is NOT included) to recharge most kinds of common such as le-ad acid , lithium , lithium iron . The output voltage can be adjusted between 24~85V, with multiple protections functions, come on and try it, it will not let you down. Specifications: Material: aluminum Photovoltaic input : 200W Suitable photovoltaic panel: Open circuit voltage: 18~55V Maximum voltage: 17~55V Photovoltaic input starting voltage: 18~55V Photovoltaic input tracking voltage: 10V~30V No-load loss: 0.35W Voltage adjustment rate: 1% Load adjustment rate: 1% PWM conversion efficiency: 97% MPPT efficiency: 99% Working temperature: -40~65 Install line length: 50mm Item size: 120 * 80 * 40mm / 4.7 * 3.1 * 1.6in Item weight: 450g / 1.0lb Package size: 160 * 90 * 50mm / 6.3 * 3.5 * 2.0in Package weight: 500g / 1.1lb Packing list: 1 * Recharging Controller