High Voltage Protection
Automaxx wind turbines automatically adjust the charge control based on the voltage of the energy storage battery. As the battery's capacity saturates, both the voltage and internal resistance of the battery will gradually increase. When Automaxx’s MPPT charge controller detects an increase in battery voltage, it changes its charging duty and limits the charging current by inducing braking. Automaxx wind turbines perform their best charging ability when battery levels are low while having substantial wind speed.
Wind-Solar Hybrid System
A high voltage protection mechanism can be more easily triggered in hybrid systems where wind and solar charging coexist. Solar charging usually provides higher voltage, so when Automaxx’s charge controller detects high voltage from solar energy, it will automatically reduce the charging current. This is normal since, in a wind-solar hybrid system, wind turbines usually serve as a supplementary power source at night or when there is insufficient sunlight. Automaxx wind turbines provide the possibility of nighttime power generation for wind-solar systems.
Overdischarge
Or deep discharge, is another reason for energy storage battery damages. Without sunlight, there is no power source replenishment for the batteries. To supply the load, batteries will continue to output power, thus deepening the depth of discharge, especially at night when solar charging is absent, further affecting the battery's lifespan. Implementing an Automaxx wind turbine can act as a power source and method of protection by helping prevent deep discharge of the battery.
Wind Turbine’s Role in Hybrid Systems
In a wind-solar system, the main power source of the system is typically sunlight due to its stability. Wind turbines usually serve as a secondary charger (maintainer) in the system due to the instability of the wind source.
Charging Duty Relationship
This example chart shows the relationship between the charging duty of the Automaxx wind turbine MPPT charge controller and the battery voltage, with the battery protection voltage set at 14V.
- When the battery voltage is below 12.5V: The charging duty remains at its maximum value, maximizing the charging current to rapidly replenish the battery's charge.
- When the voltage is between 12.5V and 14V: The charging duty gradually decreases with the voltage, optimizing charging efficiency and protecting the battery according to the adjustment principles of MPPT.
- When the voltage reaches or exceeds 14V: The high voltage protection mechanism of the MPPT charge controller is activated, reducing the charging duty to zero to stop charging and prevent overcharging.
- The red dashed line indicates the upper limit of MPPT’s protection voltage (14V). This chart helps understand how the controller adjusts charging behavior through voltage to balance charging efficiency and battery life.