Features:Ultra fast Maximum Power Point Tracking (MPPT):- Especially in case of a clouded sky, when light intensity is changing continuously, an ultra-fast MPPT controller will improve energy harvest by up to 30% compared to PWM charge controllers and by up to 10% compared to slower MPPT controllers.Advanced Maximum Power Point Detection in case of partial shading conditions:- If partial shading occurs, two or more maximum power points may be present on the power-voltage curve.Conventional MPPT s tend to lock to a local MPP, which may not be the optimum MPP.The innovative BlueSolar algorithm will always maximize energy harvest by locking to the optimum MPP.Outstanding conversion efficiency:- No cooling fan. Maximum efficiency exceeds 98%.- The full output current up to 40°C (104°F)Flexible charge algorithm:- Fully programmable charge algorithm (see the software page on our website),and eight pre-programmed algorithms, selectable with a rotary switch (see manual for details).Extensive electronic protection:- Over-temperature protection and power derating when temperature is high.PV short circuit and PV reverse polarity protection.PV reverse current protection.Internal temperature sensor:- Compensates absorption and float charge voltage for temperature.Real-time data display options- Apple and Android smartphones, tablets and other devices:see the VE.Direct to Bluetooth Smart dongle- ColorControl panelSpecifications:- Battery voltage: 12/24V Auto Select- Rated charge current: 30A- Nominal PV power, 12V 1a,b): 440W- Nominal PV power, 24V 1a,b): 880W- Maximum PV open circuit voltag: 100V- Max. PV short circuit current 2): 35A - Maximum efficiency: 98%- Self-consumption: 12V: 30mA- Charge voltage absorption: Default setting: 14,4V / 28,8V (adjustable)- Charge voltage float: Default setting: 13,8V / 27,6V (adjustable)- Charge algorithm: multi-stage adaptiv- Temperature compensation: -16 mV / °C resp. -32 mV / °CProtection:- Battery reverse polarity (fuse, not user accessible PV reverse polarity Output short circuit Over temperature- Operating temperature: -30 to +60°C (full rated output up to 40°C)- Humidity: 95%, non-condensing- Weight: 1,3 Kg- Dimensions (h x w x d): 130 x 186 x 70 mm