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

Product detailed description

MPPT controller 20A for all available battery types with system voltage of 12V or 24V and for PV panels with max. power of 260W (12V) or 520W (24V) with max. input voltage of 55V and min. It is therefore also suitable for panels with 12V system voltage, which generate 16–18V at maximum load. This controller uses an internal converter to adjust the V-A characteristic 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 of the solar panel and 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 the 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 above 95%, so the losses are minimal and the controllers can generally 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, full power will not be utilized, but the controller's function will remain intact without damage.
- max. voltage of PV panel: 55V (-20°C), 50V(+25°C)
- min. voltage of PV panel 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 at full power of 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 batteries with liquid electrolyte
- CV-float = charging with maintenance voltage of 13.5–13.8V (adjustable)
- battery type selection: With 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 (maintenance) charging
- protection rating IP32
- RS485 interface
- operating temperature: –25°C~55°C
- dimensions: 189 × 182 × 64 mm
- weight: 1 kg