With the Victron BlueSolar MPPT 150/70 Tr controller you can enjoy a charging current up to 70 Amps and PV voltage up to 150 volts.The Victron BlueSolar 150/70-Tr MPPT charge controller can charge a lower rated voltage battery from a higher rated voltage PV panels of at least +5V.The BlueSolar controller will automatically adjust the nominal voltage of the battery to 12, 24, 36, or 48V once connected to the controller.Features:Ultra-fast Maximum Power Point Tracking (MPPT).Especially under cloudy skies, when light intensity changes continuously, an ultra-fast MPPT controller will improve energy harvesting by up to 30% compared to PWM charge controllers, and up to 10% compared to slower MPPT controllers.Advanced Maximum Power Point Detection in case of partial cloud cover.In case of partial cloudiness, two or more maximum power points (MPP) may occur on the load voltage curve.Conventional MPPTs typically select a local MPP, which is not necessarily the optimal MPP.SmartSolar´s innovative algorithm will always maximize energy harvesting by selecting the optimal MPP.Exceptional conversion efficiency.Fanless.Maximum efficiency exceeds 98%.Flexible charging algorithm.A fully programmable charging algorithm (see the software page of our website) and eight pre-programmed charging algorithms, which can be selected with a rotary selector (see manual for more information).Extensive electronic protection.Over-temperature protection and power reduction in case of high temperature.Short-circuit and reverse polarity protection on PV panels.PV reverse current protection.Internal temperature sensor.Compensates absorption and float charge voltage as a function of temperature.Optional sensor for external battery voltage and temperature via Bluetooth.A Smart Battery Sense sensor or a BMV-712 Smart battery monitor can be used to communicate battery voltage and temperature.communicate battery voltage and temperature to one or more SmartSolar charge controllers SmartSolar.Fully discharged battery recovery function.Will start charging even if the battery is discharged to zero volts.Will reconnect to a fully discharged lithium-ion battery with internal disconnect function.VE.Direct.For a wired data connection to a Color Control GX, other GX products, PC or other devices.Remote On/Off.For connection to a VE.BUS BMS, for example.Programmable relay.Can be programmed (e.g.with a smartphone) to trigger an alarm or other events to trigger an alarm or other events.