SmartSolar MPPT 250/60-MC4 solar charge controller from Victron Energy with: 12V/24V/36V/48V auto select battery voltage *Software tool required for 36V 60A rated charge current Maximum PV open circuit voltage – 250V absolute maximum coldest conditions 860W @ 12V, 1720W @ 24V, 3440W @ 48V maximum PV power Automatic load disconnect 99% peak efficiency Reverse polarity (fuse) protection, PV reverse polarity protection, output short circuit protection, over temperature protection 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 MPPTs tend to lock to a local MPP, which may not be the optimum MPP. The innovative SmartSolar algorithm will always maximize energy harvest by locking to the optimum MPP. Outstanding conversion efficiency No cooling fan. Maximum efficiency exceeds 99%. Flexible charge algorithm Fully programmable charge algorithm (see the software page on our website), and eight pre-programmed algorithms, selectable with a rotary witch (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. Bluetooth Smart built-in: dongle not needed The wireless solution to set-up, monitor and update the controller using Apple and Android smartphones, tablets or other devices. VE.Direct For a wired data connection to a Color Control panel, Venus GX, PC or other devices Remote on-off To connect for example to a VE.BUS BMS. Programmable relay Can be programmed (a.o. with a smartphone) to trip on an alarm, or other events. Optional: LCD display