Charlie is listed by TÜV to UL 858, the existing safety standard for household electric ranges.
Battery safety: We’ve tested Charlie’s battery to UL 1973, the standard for stationary battery packs. Charlie’s battery is a UL Recognized Component to UL 1973.
Transport safety: The battery meets UN 38.3 requirements, ensuring it is safe for transport and shipping.
Fire safety: To validate the safety of Charlie’s battery design, we subjected it to the UL 9540A test method, which evaluates fire propagation in battery energy storage systems and involves tests of the cell, battery, and full product.
We offer a full 2 year manufacturer's warranty on Charlie — twice the industry standard.
The battery is warrantied for 5 years.
We will repair or replace any defective parts or parts that fail from normal wear and tear. Read our warranty policy to see what's covered.