Solar MPPT Controller Lumiax MT3075-BT, 12-24V/30A, Bluetooth

Product detailed description

30A MPPT controller for all common battery types with a system voltage of 12V or 24V and for PV panels with max. power of 390W (12V) or 780W (24V) with max. input voltage of 55V and min.. It is therefore also suitable for panels with a 12V system voltage, which generate 16–18V under maximum load. Using an internal converter, this controller adjusts the V-A characteristics of the current source - the solar panel - so that it is optimal for charging the battery. It can utilize the energy from solar panels better than a PWM controller, which regulates charging only by pulse limiting the direct connection between the solar panel and the battery, where the pulse width is proportional to the state of charge of the battery. In other words, an MPPT controller can generate the ideal voltage and current for charging the battery from the source's higher voltage and lower current. For example, it converts 18V and 5A into 14.5V/6.2A. The conversion efficiency of the V-A characteristics is usually above 95%, so losses are minimal, and the controllers can generally be adapted to different types of batteries to make charging as optimal as possible.
Technical parameters:
- system voltage 12 V or 24 V, usable batteries: Pb AGM, Pb AGM GEL, Pb liquid, LiFePO4
- max. PV panel power: 390W (780W-24V) for maximum utilization of the controller. When using more powerful panels, full power will not be utilized, but the controller's function will remain intact without damage.
- max. PV panel voltage: 55V (-20°C), 50V (+25°C)
- min. PV panel voltage when using a 12V battery: 15.6V – verified by own measurement
- max. charging current: 30A
- own consumption: <8mA(12V), <12mA(24V)
- 4-stage charging - only for Pb batteries (CC, CV - boost, CV - float, CV-equalize)
- CC = charging at full PV panel power up to the set end-of-charge value (CV-boost)
- CV-boost = charging for 1–2 hours after reaching a terminal voltage of 14–15V (adjustable)
- CV-equalize = charging with increased voltage to mix the liquid electrolyte - optional, only for lead-acid batteries with liquid electrolyte
- CV-float = charging with maintenance voltage of 13.5–13.8V (adjustable)
- battery type selection: Liquid dielectric, AGM, AGM GEL, LiFePO4
- LCD display for setting and monitoring operating parameters
- temperature compensation: -4.17mV/K per cell during boost+equal charging, -3.33mV/K per cell during float charging (maintenance)
- protection rating IP32
- RS485 interface
- operating temperature: –25°C~55°C
- dimensions: 189 × 182 × 64 mm
- weight: 1.3 kg
Note: for setup via Bluetooth, the battery must be charged to at least 12.5V. Solar Life (skywise) application.