In the section below, you can find the most frequently asked questions (and answers) we received.
These are categorized in Operation, Reliability, Compliance, and Others.
You can select the FAQs by category or use the search function at the top of the website to directly search for information.
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Most MEAN WELL power supplies are certified to be operated till 2000m. For some models the certification is valid for a higher altitude, this will be shown on the first page of the power supply under features (1)(2).
Please note that derating is needed at an altitude above 2000m. See FAQ “Do I need to derate my power supply when I used it over 2000m?”
