MPPT Solar Charge Controller Lumiax MT2075-BT, 12-24V/20A, Bluetooth

Product detailed description

MPPT controller 20A for all available battery types with system voltage 12V or 24V and for PV panels with max. power 260W (12V) or 520W (24V) with max. input voltage 55V and min. It is therefore also suitable for panels with a system voltage of 12V, which generate 16–18V under maximum load. This controller uses an internal converter to adjust the V-A characteristic of the current source - solar panel - so that it is optimal for charging the battery. It can utilize 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 the battery being charged. In other words, an MPPT controller can generate the ideal voltage and current for charging the battery from a higher voltage and lower current of the source. For example, it converts 18V and 5A into 14.5V/6.2A. The conversion efficiency of the V-A characteristic is usually over 95%, so losses are minimal, and the controllers can usually be adapted to different types of batteries so that charging is as optimal as possible.
Technical parameters:
- system voltage 12 V or 24 V, usable batteries: Pb AGM, Pb AGM GEL, Pb liquid, LiFePO4
- max. power of PV panels: 260W (520W-24V) for maximum utilization of the controller. When using more powerful panels, the full power will not be utilized, but the function of the controller 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: 20A
- self-consumption: <8mA(12V), <12mA(24V)
- 4-stage charging - for Pb batteries only (CC, CV – boost, CV – float, CV-equalize)
- CC = charging at full power of PV panels 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 13.5–13.8V (adjustable)
- battery type selection: liquid electrolyte, 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 (maintenance) charging
- protection rating IP32
- RS485 interface
- operating temperature: –25°C~55°C
- dimensions: 189 × 182 × 64 mm
- weight: 1 kg