Can you perform equalization charging during cloudy weather with solar?

Planning for Equalization on a Cloudy Day

When planning to perform equalization charging during cloudy weather with solar, consider the system’s energy storage capacity and the amount of charge available from the solar panels. A general rule of thumb is to reserve at least 20% of the daily solar energy production for equalization charging. For example, if your solar array produces 20 kWh on a sunny day, set aside 4 kWh (20% of 20 kWh) for equalization charging during cloudy weather.

Implementing Equalization on a Cloudy Day

To implement equalization charging during cloudy weather, start by checking the state of charge (SOC) of the batteries and the available solar energy. If the SOC is above 50% and the solar energy is sufficient to cover the equalization charge, proceed with the equalization process. Use a dedicated equalization charge controller to ensure safe and efficient charging. Typically, equalization charging involves applying a higher voltage than the normal charge voltage for a short period, usually 2-4 hours. During this time, the equalization controller will slowly raise the voltage to the desired level and then maintain it for the set duration.

Safety Precautions During Equalization on a Cloudy Day

When performing equalization charging during cloudy weather, exercise caution to prevent overcharging. Monitor the battery temperature, SOC, and equalization charge current closely. If the battery temperature exceeds 45°C (113°F) or the SOC falls below 20%, stop the equalization process immediately. Also, ensure that the solar array is not producing excessive current, which can lead to overcharging. Regularly inspect and maintain the solar array, equalization controller, and battery bank to ensure safe and efficient operation.