Solar controller MPPT Lumiax MT2075, 12-24V/20A

MPPT controller 20A for all available types of batteries with a system voltage of 12V or 24V and for PV panels with a max. output of 260W(12V) or 520W(24V) with a max. input voltage of 55V and a min. input voltage of 1V higher than the battery charging voltage . It is therefore also suitable for panels with a system voltage of 12V, which generate 16-18V at maximum load. Using an internal inverter, this controller adjusts the V-A characteristic of the current source-solar panel to be optimal for charging the battery. It can use the energy from the solar panels better than the PWM controller, which regulates charging only by pulse limiting the direct connection of the solar panel and the battery, where the pulse width is proportional to the state of the battery being charged. In other words, the MPPT controller can generate the ideal voltage and current for charging the battery from the higher voltage and lower current of the source. For example, it converts 18V and 5A to 14.5V/6.2A. The conversion efficiency of the V-A characteristic is usually over 95%, so losses are minimal and the regulators 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 use of the controller. When using a more powerful panel, the full power will not be used, but the function of the regulator will be preserved without damage.
- max. PV panel voltage: 55V (-20°C), 50V(+25°C)
- min. PV panel voltage when using a 12 V battery: 15.6 V - verified by own measurement
- max. charging current: 20 A
- own consumption: <8mA(12V),<12mA(24V)
- 4 stage charging - only for Pb batteries (CC, CV – boost, CV – float, CV-equalize)
- CC = charging with the full power of the PV panels up to the set value of the end of charging (CV-boost)
- CV-boost = charging for 1-2 hours after reaching a terminal voltage of 14-15 V (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 a maintenance voltage of 13.5-13.8V (adjustable)
- choice of battery type: With liquid dielectric, AGM, AGM GEL, LiFePO4
- LCD display for setting and monitoring operating parameters
- temperature compensation: –4.17mV/K per cell when charging boost+equal -3.33mV/K per cell when charging float (sustaining)
- protection IP32
- RS485 interface
- operating temperature: –25°C~55°C
- dimensions: 189 × 182 × 64 mm
- weight: 1 kg