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MPPT Charging Technology and Stages
Maximum Power Point Tracking (MPPT) is an advanced tracking algorithm that keeps track of input
power coming from the solar panels in real time to maximize the charger's performance and improve
the system's total efficiency.
The amount of solar energy available during a day varies based on conditions like geographical
location, time of the day, inclination angle of the solar panels, relative humidity and impurities in the
air, surface cleanliness of the solar panels etc. With all these conditions at play, effecting the amount
of energy reaching the panels, it is important that every bit of converted electrical energy is used to
charge batteries as efficiently as possible. The MPPT charging technology is designed to track this
variable amount of energy coming from the panels and adjust the voltage and current parameters to
maximize the battery charging efficiency. The MPPT charging algorithm comprises of four stages that
provide rapid, efficient, and safe battery charging.
Four Stage Charging Process
The charge controller's 4-stage charging process is illustrated in the figure below.
Fig. 4
Fig. 4
MPPT Charge Stage
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 Stage
In this stage, when the battery voltage reaches the Boost voltage setpoint value, the charger uses a
constant voltage to charge the battery to prevent excess heating.
CCD-0007727 Rev: 06-01-23
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