Charge equalizer 2 batteries? lead

Photovoltaic battery equalizer 24V, 2 x batteries, permanent individual voltage monitor, reverse polarity protection Photovoltaic battery equalizer 24V, 2 x batteries, permanent individual voltage monitor, reverse polarity protection Any electrician knows that no two batteries are identical , even bought in the same batch. Being mounted in series, with the passage of time there are high chances that one of the batteries will charge more or less, unbalancing the system, and problems will not be long in coming: the total charging capacity decreases, there is even a danger of sulphation of the batteries if no intervention is done at time. What does this equalizer do? It connects to the 2 batteries in the system and constantly monitors the individual voltages, and when it detects voltage differences, it equalizes the voltage between the batteries, the current passing from the battery with the highest voltage to the weakest. Thus, the efficiency of the batteries and their lifespan increases considerably, without requiring any manual control, making the process completely automatic and guaranteeing the good functioning of the battery set. 

Valid for all types of batteries (gel, VRLA, AGM, lifepo4), from 2.4V to 12V. 

Features:

- Nominal battery voltage 2 x (2.4V / 3.6V / 6V / 9V / 12V)

- optimization current 0-10A

- static current 5mA (12V) 1.2mA (2.4V)

- Dimensions 62 * 124 * 27 mm

- Reverse polarity protection

- Undervoltage disconnection: 1.8V LED INDICATOR LED A LED B U(A)=U(B) OFF OFF U(A)>U(B) FLASH OFF U(A) U(A)<10V ON OFF U (B)<10V OFF ON U(A/B)<10V ON ON