Wiltson Introduces 26650 Backup Battery Capable of Direct Charging in Extreme Cold

Wiltson Energy, a leading innovator in advanced LiFePO₄ (lithium iron phosphate) battery solutions, announced the launch of its next-generation 26650-format low-temperature backup battery for solar tracking systems. Engineered for extreme climates, the new battery delivers reliable operation and direct charging even below freezing, eliminating the need for additional heating components.

Solar tracking systems can boost energy yield by 10% to 40% compared with fixed-mount installations. However, conventional batteries often experience significant performance drops in harsh winter conditions. Standard lead-acid batteries can lose 20%–30% of capacity below 0°C (32°F), while typical lithium batteries may suffer reduced output or face lithium dendrite formation risks during charging. These issues can cause trackers to freeze or shut down during outages, reducing expected energy gains.

Wiltson’s low-temperature LiFePO₄ battery addresses these challenges with an ultra-wide operating range of –40°C to +60°C (–40°F to 140°F). Unlike competing solutions that require heating elements or external warming circuits, Wiltson’s 26650 cells can be safely charged below freezing, reducing cost and complexity while maximizing system efficiency.

“Traditional battery systems either require preheating or shut down entirely in extreme cold, leaving trackers stuck and operators losing production,” said Daniel Fan, Project Manager at Wiltson Energy. “Our new 26650 LiFePO₄ low-temperature battery was engineered specifically for these conditions — it keeps solar trackers moving at –40°C without heating.”

“This innovation represents more than just a technical upgrade — it is a step toward making solar tracker technology reliable in every climate,” added Robert Xie, CEO of Wiltson Energy. “By ensuring uninterrupted operation, we are helping customers maximize energy yield.”