Renogy Rover PG, Installation And Operation Manual

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The Rover PG MPPT charge controller has a 4-stage battery charging algorithm for a rapid,
efficient, and safe battery charging. They include: Bulk Charge, Boost Charge, Float Charge,
and Equalization.
Bulk Charge:
This algorithm is used for day to day charging. It uses 100% of available solar
power to recharge the battery and is equivalent to constant current. In this stage the battery
voltage has not yet reached constant voltage (Equalize or Boost), the controller operates in
constant current mode, delivering its maximum current to the batteries (MPPT Charging) .
Float Charge:
After the constant voltage stage, the controller will reduce the battery voltage
to a float voltage set point. Once the battery is fully charged, there will be no more chemical
reactions and all the charge current would turn into heat or gas. Because of this,
Constant Charging:
When the battery reaches the constant voltage set point, the controller
will start to operate in constant charging mode, where it is no longer MPPT charging. The current
will drop gradually. This has two stages, equalize and boost and they are not carried out
constantly in a full charge process to avoid too much gas precipitation or overheating of the
battery.

Boost Charge: Boost stage maintains a charge for 2 hours by default. The user
can adjust the constant time and preset value of boost per their demand.
Four Charging Stages
Battery
Voltage
Equalize
Boost
Float
Recharge
Bulk Charge
A B C
Constant charging
Cumulative Time:3h
Float Charge
Boost
Time
Battery
Current
Time
Bulk
Max Current
Duration Time:2h
(Range:10-180min)
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