TSI builds electrical power products to succeed, time after time.

The Ultimate Power Solution. TSI Power makes the highest-quality power solutions available. Our off-the-shelf and custom products are engineered to perform continuously – and reliably – at the outer limits of their stated specifications. Customers around the world rely on TSI Power to protect their mission-critical applications.

TSI Power Mural

Headquartered in Antigo Wisconsin, USA, TSI Power thrives on being located in a small community with a stable work force and ready access to major component suppliers. We value our suppliers and have developed long-term relationships in order to assure best quality and lead time for components.

We design, engineer, manufacture and service all of our products right here in north central Wisconsin. Because of our corporate culture and rigorous hiring standards, our employees have many years of on-the-job experience and employee turnover is extremely low. We believe that employee skills coupled with stability are the foundation to our ability to provide high quality power products.

With our nimble structure, we’re able to quickly provide the help and support our customers need, from sales to technical support to trouble shooting. Our customers find it easy to access TSI Power’s decision makers and technical resources, since they don’t have to go through multiple layers of people and departments. If you need help, we’re just a phone call or e-mail away – and we’ll respond within 24 hours.

Some of Our Customers

Exxon Mobil
Exelon
Ericsson
Entergy
Energizer
Enbridge
Eli Lilly and Company
EATON
Eastman Kodak Company
E.ON SE
Dupont de Nemours, Inc.
Duke Energy
Dow Chemical Company
Domtar Corporation
Dominon Energy
Dallas Fort Worth International Airport
Dallas Area Rapid Transit (DART)
Daisy
Curtiss Wright
Crate & Barrel
Corning
Cornell University
ConocoPhillips
Consolidated Edison, Inc.
Comcast
Canadian National Railway
CME Group
City of Calgary, Alberta
Canadian Pacific Railway
Brookhaven National Laboratory
Brazilian Navy
BP
Bonneville Power Administration
Bombardier
Bechtel
Bayer AG
Battelle Memorial Institute
Bay Area Rapid Transit (BART)
Barrick Gold Corporation
Baker Hughes
BAE Systems
Atlas Copco
AT&T
Arizona State University (ASU)
Argonne National Laboratory
Archer-Daniels-Midland Company (ADM)
Applied Materials
Apple
Amazon
BNSF
American Airlines
Alcoa
Air Liquide
Agilent Technologies
American Electric Power
Abbott
ABB
3M
Acadia National Park
Alabama Power
Boeing
Fastenal
FirstEnergy Corp.
Fluke Corporation
Framatome
G4S
General Atomics
General Dynamics
General Electric
Hess Corporation
Honeywell
Intel
Kinder Morgan
Korbel California Champagne
L3 Harris Technologies
National Park Service
United States Navy
United States Coast Guard
Michigan State University
Newmont Corporation
NextEra Energy
Northeast Ohio Regional Sewer District (NEORSD)
NTT DoCoMo
Guam Power Authority
Oxy (Occidental Petroleum)
Florida Fish and Wildlife Conservation Commission
Regional Rail LLC
Rockwell Automation
Schneider Electric
United States Department of Energy
Federal Aviation Administration (FAA)
Federal Reserve System
Siemens
Telenor Group
Tesla
The Walt Disney Corporation
United States Department of Defense (the Pentagon)
United States Air Force (USAF)
The University of Texas at Austin
University of Toronto
Regional Transportation District (Denver metro area)
Touchstone Energy Cooperatives
Ford Motor Company
Hampton Roads Sanitation District (HRSD)
Leidos
Anacostia Rail Holdings
Singapore Changhi Airport
Motorola Solutions
New York City Fire Department (FDNY)
Port Authority of New York and New Jersey
National Institutes of Health (NIH)
National Railway Equipment (NRE)
NAV Canada
Oregon Department of Fish and Wildlife
North Carolina Department of Public Safety (NCDPS)
Neptune Technology Group
Emera Incorporated
New York Power Authority (NYPA)
Google
Federal Deposit Insurance Corporation (FDIC)
Federal Signal Corporation
FedEx Corporation
Billerud
Electric Power Research Institute
Alaska Power and Telephone Company (AP&T)
Analog Devices
AB InBev
Avery Dennison
Birmingham Rail & Locomotive
Brigham Young University (BYU)
British American Tobacco p.l.c.
United States Bureau of Reclamation (USBR)
United States Department of the Interior
Cagayan Electric Power & Light Company, Inc. (CEPALCO)
Cardinal Glass Industries
Cargill
CITGO
Central Arizona Project
College of William & Mary
Colonial Pipeline
Constellation Energy
Cox Communications
Deerfield Academy`
Cushman & Wakefield
DTE Energy
Ministère des Armées
United States Department of Health and Human Services (HHS)
United States Department of Transportation (USDOT)
Dwight D. Eisenhower Presidential Library, Museum and Boyhood Home
el paso WATER
Emerson Electric Company
Environment and Climate Change Canada
United States Department of Justice
Florida Department of Agriculture and Consumer Services
Florida Department of Corrections
Fraunhofer Society
Freeport McMoRan
Crown Castle
United Technologies
United States Air National Guard (ANG)
Fujitsu
General Motors (GM)
Georgetown University
Georgia Institute of Technology (Georgia Tech)
Georgia Department of Agriculture
Southern Company
GKN Ltd
Globalstar
National Aeronautics and Space Administration (NASA)
Goodyear Tire and Rubber Company
Government of Canada
Halliburton
Verizon Communications
Hawaii Electric Industries
Los Angeles Department of Water and Power (LADWP)
Pacific Gas and Electric Company (PG&E)
Hewlett Packard Enterprise (HPE)
Hitachi
Carnival Corporation & plc
Honda
EchoStar Corporation
International Business Machines (IBM)
Mayo Clinic
Idaho National Laboratory
Oak Ridge National Laboratory (ORNL)
Idaho Power
Indiana Department of Transportation (INDOT)
Purdue University
IPG Photonics
JABIL
Jacksonville Port Authority (JAXPORT)
Johnson Controls
Kauaʻi Island Utility Cooperative
Ferrero SpA
Kenai Fjords National Park
Kikkoman Corporation
Enova Power
Koch Industries
Komatsu
Korea Aerospace Industries (KAI; 한국항공우주산업)
Laboratory Corporation of America (Labcorp)
Lafarge
Landis+Gyr
Lumen Technologies
Frontier Communications
Lexmark
Danaher
Lockheed Martin
CVS Health
Lower Colorado River Authority
Broadcom
Nokia
Lufkin Industries

Why You'll Love Us

High Technology Level
Shorter Lead Times
Enthusiastic Customer Support

Key Staff

Peter Nystrom
Peter Nystrom
Chief Executive Officer
David Nystrom
David Nystrom
President
Maria Maddix
Maria Maddix
Vice President of Operations
Nam Paik
Nam Paik
Vice President of Sales
Francis Phang
Francis Phang
TSI Power Asia-Pacific
Ujjwal Singh
Ujjwal Singh
Engineering Manager
VRP is, by far, the best piece of equipment that I have purchased. I looked at other, pricier voltage regulators and protectors like Monster, but I am glad I chose VRP. I doubt Monster could have withstood abuse such surges/spikes and still operate as designed. VRP is built much heavier than Monster’s best, which I know because I lifted both. And, it’s proven to really work – not only at providing rock-solid, stable clean power but at protecting my gear!

Jeff Krentz