Frequently Asked Question
A UPS switches off immediately after input fails
Last Updated 3 years agoIf UPS works normally in line mode, but switches off immediately in battery mode, then most likely your batteries are too weak to supply the power. Please check the age of your UPS. Typical battery design life is 3-5 years. You might need to replace the batteries.
Please remember that the life of the battery starts at the time of production (not at the time of first usage). This time might be considerably long (even a full year in some cases). A battery must be recharged every 2-3 months in storage, otherwise it depletes its capacity.
How to read voltage level: https://support.powerwalker.com/kb/faq.php?id=68
How to choose the right batteries for replacement: https://support.powerwalker.com/kb/faq.php?id=76