Contact SEI

Thank you for your interest in SEI’s line of DC-UPSs. For a quote, information, or a customized unit, please complete this form, call us at 301-694-9601​ or email us at

Contact SEI

Contact Us

This information will remain private and will not be used for solicitation. 

For order information or technical support call us at 301-694-9601 or email us using our Contact Us form

System Engineering International, Inc.

5115 Pegasus Court • Suite Q
Frederick, MD 21704

Voice: (301) 694-9601
Fax: (301) 694-9608