Votronic 1720 MPP 350 Duo Digital 21A 12V MPPT Solar Charge Controller for Two Batteries

MPP solar controller for high-quality motorhomes, caravans, and boats. Suitable for solar modules with up to 350 Wp module power, a maximum of 21 A module current, and a maximum of 50 V module voltage for 12V batteries. Charging options: 1 supply battery and 1 starter battery. Votronic solar controllers of the "MPP" (Maximum Power Point) series with "IU1oU2" charging characteristic are connected as a link between the solar panel(s) and battery(ies). With MPP technology, the controller automatically determines the maximum power output (MPP) of the solar modules several times per second. It transforms the voltage surplus of the solar module into a higher charging current for the battery (achieved through high-frequency switching regulator technology with high efficiency). This increase in charging current results in shorter charging times and the best possible performance utilization of the solar system. MPP solar controllers operate fully automatically, are maintenance-free, and offer the following features: MPP charging current increase compared to conventional controllers through the use of state-of-the-art controller technology (microprocessor) by 10% to 30% (efficiency > 95%). The performance increase is particularly noticeable in cooler seasons and in high fog conditions as well as lower and diffuse lighting (wintering). Switchable charging characteristics for optimal charging of gel/dryfit, AGM/fleece, or acid/wet, as well as LiFePO4 batteries. The charging voltage is free of spikes and regulated to ensure that overcharging of the batteries is excluded.