Outdoor power supply charging below 0 degrees

Charging at extreme temperatures can cause permanent damage: Charging batteries outside their recommended temperature range can lead to issues like lithium plating, gas buildup, venting, or even case cracking, especially in lithium-ion and lead-acid chemistries.

At temperatures below 32°F (0°C), the internal chemical reactions slow down, and charging can lead to lithium plating—a condition that damages the battery cells irreversibly. To avoid this, always allow the battery to reach room temperature before plugging it in.

It should set the voltage higher when the battery is charged at lower temperatures and a lower voltage when charging at higher temperatures. The charge should be at 0.3C or less when the temperature is below freezing. Nickel-based batteries: A nickel-based battery can have a current charge reduced to 0.1C if temperatures are below freezing.

Charging a Lithium battery in ambient temperatures below 0°C / 32°F must be avoided. The reason for this is it may potentially damage the battery and / or reduce its lifespan. The optimum ambient temperature for charging a Lithium battery is +5°C to +45°C / 41°F to 113°F.

There are also other ways to charge batteries when dealing with colder and hotter temperatures. Lithium-ion batteries: A lithium-ion battery can undergo a fast charge at 41°F yet the charge rate should be lowered if under this temperature. No charging should ever be done to a lithium battery below freezing temperatures.

Li-ion batteries charging below 0°C (32°F) must undergo regulatory issue to certify that no lithium plating will occur. In addition, a specially designed charger will keep the allotted current and voltage within a safe limit throughout the temperature bandwidth.