Lumiax Magic Series User Manual

2.3 MPPT—Four Charging Stage
Magic series controller has a 4-stage battery charging algorithm for rapid, efficient, and safe
battery charging.
MPPT Charge
In this stage, the battery voltage has not yet reached boost voltage and 100% of available
solar power is used to recharge the battery.
Boost Charge
When the battery has recharged to the Boost voltage setpoint, constant-voltage regulation is
used to prevent heating and excessive battery gassing. The Boost stage remains 120 minutes
and then goes to Float Charge. Every time when the controller is powered on, if it detects
neither over discharged nor overvoltage, the charging will enter into boost charging stage.
Float Charge
After the Boost voltage stage, the controller will reduce the battery voltage to Float voltage
setpoint. When the battery is fully recharged, there will be no more chemical reactions and all
the charge current transmits into heat and gas at this time. Then the controller reduces the
voltage to the floating stage, charging with a smaller voltage and current. It will reduce the
temperature of battery and prevent the gassing, also charging the battery slightly at the same
time. The purpose of Float stage is to offset the power consumption caused by self
consumption and small loads in the whole system, while maintaining full battery storage
capacity.
In Float stage, loads can continue to draw power from the battery. In the event that the
system load(s) exceed the solar charge current, the controller will no longer be able to
maintain the battery at the Float setpoint. Should the battery voltage remains below the boost
reconnect charging voltage, the controller will exit Float stage and return to Bulk charging.
Equalization Charge
Certain types of batteries benefit from periodic equalizing charge, which can stir the
electrolyte, balance battery voltage and complete chemical reaction. Equalizing charge
increases the battery voltage, higher than the standard complement voltage, which gasifies
the battery electrolyte. If it detects that the battery is being over discharged, the solar
controller will automatically turn the battery to equalization charging stage, and the
equalization charging will be 120mins. Equalizing charge and boost charge are not carried out
constantly in a full charge process to avoid too much gas precipitation or overheating of
battery.
U(V)
MPPT
Charge
Boost
Charge
Float
Charge
Equalize
Charge
Night
TIME
13.7V
14.5V
14.8V
Night
Risk of explosion!
Equalizing flooded battery can produce explosive gases, so well
ventilation of battery box is necessary.

Lumiax Magic Series Specifications

General

Brand	Lumiax
Model	Magic Series
Category	Controller
Language	English