TSi Power Corporation

What TSi Power Corporation does

TSi Power Corporation is a privately held US manufacturer of electric power quality solutions, founded in 1998 and headquartered in Antigo, Wisconsin. The company designs and builds indoor and outdoor hardware that protects sensitive electronic loads from voltage fluctuations, surges, sags, transients, and outages. Its core product lines are precision automatic voltage regulators (VRP indoor / VRX outdoor), isolation line conditioners (ILC), automatic transfer switches (ATS-500/800/1000), and rugged outdoor uninterruptible power supplies (XUPS in AC and DC variants), supported by a sub-brand called Raptor that adds momentary voltage restorers, voltage loss compensators, and continuous voltage conditioners. The underlying technology is an AC-chopper architecture in which an inverter imposes ultra-fast PWM correction voltage on the primary winding of a buck-boost transformer, packaged in NEMA-3R/IP44 enclosures rated for operation from -40°C to +50°C.

The company's go-to-market is consultative and direct: sales engineers handle every transaction through phone, email, or custom-quote forms, with no resellers or e-commerce channel. Pricing is opaque and engineered-to-order, reflecting a hardware-led revenue model supplemented by custom engineering services for specialized applications. TSi Power serves communications, security, factory automation, hospital and laboratory, OEM, and government customers, with documented deployments in nuclear facility security (140+ UPS units across 12+ plants via G4S), automotive OEM manufacturing (139 VRP units at a Hyundai supplier in India), municipal CCTV systems, and Middle East power and surveillance infrastructure. The company holds ISO 9001:2015, ETL/cETL, UL 60601-1 3rd Edition (medical), and CE certifications, and operates a wholly-owned Indian subsidiary (TSi Elecpower Ltd) while shipping to North America, the Middle East, South Asia, East Asia, Latin America, and Oceania.

The business model is low-volume, high-margin engineered industrial hardware, with revenue driven by project-level orders rather than recurring contracts. The 11–50 employee footprint, custom sales approach, and absence of any disclosed funding rounds or institutional investors position TSi Power as a stable, founder-controlled specialty manufacturer rather than a venture-backed growth company.

Name

TSi Power Corporation

Legal name

TSi Power Corporation

Website

https://tsipower.com

Company type

Private

Founded year

1998

Operating status

Operating

Headcount range

11–50 employees

Short description

TSi Power Corporation is a privately held Antigo, Wisconsin manufacturer of indoor and outdoor power quality hardware — voltage regulators, isolation line conditioners, automatic transfer switches, and rugged outdoor UPS systems — serving industrial, telecom, security, medical, OEM, and government customers via direct consultative sales.

Ownership category

akta.pro rank

Product category

Power Quality Equipment

NAICS

Power, Distribution, and Specialty Transformer Manufacturing (335311), Electrical Equipment Manufacturing (3353), Relay and Industrial Control Manufacturing (335314)

SIC

Electronic & Other Electrical Equipment (No Computer Equip) (3600), Electronic Coils, Transformers & Other Inductors (3677), Instruments For Meas & Testing Of Electricity & Elec Signals (3825)

akta.pro primary industry

Power Conditioners & Voltage Regulators (HDACAJAD)

akta.pro secondary industries

Power Quality, Metering & Monitoring (HDACAJAG), Backup Power & Critical Power Systems (Generators/UPS) (IMAIABAJ)

Keywords

• Automatic voltage regulators
• Outdoor UPS systems
• Power quality solutions
• Isolation line conditioners
• Automatic transfer switches

Headquarters

HQ city

Antigo

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Supply Chain, Personnel, Operations, Technology or R&D, Marketing or Sales, Infrastructure

Revenue model

1. Power Quality Equipment Sales: TSI Power generates revenue primarily through the sale of power quality equipment including automatic voltage regulators, isolation line conditioners, automatic transfer switches, and outdoor UPS systems. Products are sold as one-time purchases with various power ratings and configurations to meet specific application requirements.
2. Custom Solutions: The company designs and manufactures custom DC UPS units and custom power solutions for specialized applications. This includes bespoke products for unique customer requirements, often involving engineering consultation and custom development.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels7 records

Core offering

TSi Power Corporation manufactures electric power quality solutions consisting of automatic voltage regulators (VRP indoor and VRX outdoor), isolation line conditioners (ILC), automatic transfer switches (ATS), and outdoor uninterruptible power supplies (XUPS AC and DC variants) for industrial, commercial, government, telecom, medical, and security applications. The company also delivers custom-engineered DC UPS and power quality solutions for specialized environments, alongside accessories such as maintenance bypass switches, battery heaters, and mounting brackets. Products are designed for indoor use and for rugged outdoor operation in extreme temperature ranges from -40°C to +50°C.

Product overview

TSi Power Corporation manufactures a comprehensive portfolio of electric power quality solutions consisting of indoor and outdoor product lines. The core offerings include VRP/VRX automatic voltage regulators for precision voltage regulation, ILC isolation line conditioners for electrical isolation and noise filtering, ATS automatic transfer switches for power source redundancy, and outdoor XUPS systems for uninterruptible backup power. The TSI Raptor sub-brand offers advanced solutions including Falcon (continuous voltage regulation), Sparrow Hawk (momentary voltage restoration), Red Tail (voltage loss compensation with energy storage), and Merlin (continuous voltage conditioning). The product lineup is supported by accessories including maintenance bypass switches, battery heaters, and mounting brackets, all backed by custom engineering services for specialized applications.

Differentiator

Problem solved

Functional benefit

Brands

• Raptor: A power platform product line including Continuous Voltage Regulator (CVR/Falcon), Momentary Voltage Restorer (MVR/Sparrow Hawk), Voltage Loss Compensator (VLC/Red Tail), and Continuous Voltage Conditioner (CVC/Merlin) series.

Products and services

• Automatic Voltage Regulators (VRP indoor and VRX outdoor) Indoor and outdoor precision automatic voltage regulators using AC-chopper technology with ultra-fast PWM correction applied to buck-boost transformers, protecting sensitive electronic equipment from unstable AC mains voltage; VRX models are NEMA-3R/IP44 weather-proof for extreme temperatures from -40°C to +50°C.
• Isolation Line Conditioners (ILC series) Isolation line conditioners providing electrical isolation, noise filtering, and surge suppression, available in indoor and outdoor configurations; ILC MED and ILC MED EU models are hospital/medical-grade isolation transformers tested and listed to UL 60601-1 3rd Edition.
• Automatic Transfer Switches (ATS-500, ATS-800, ATS-1000) Fast automatic transfer switches (including ATS-800 in 1U form factor) that provide seamless transfer between autonomous power sources to deliver redundancy and critical-load protection in mission-critical applications.
• Outdoor AC UPS (XUPS series) Rugged outdoor uninterruptible power supplies designed for backup power in extreme environments, with up to 18 hours backup time and 2,250 watts output power, integrating voltage regulation, noise filtering, and surge suppression in a line-interactive topology.
• Outdoor DC UPS All-weather outdoor DC UPS systems with online UPS topology, zero transfer time, up to 24 hours backup time, 2,200 watts output power, 90-240 Vac input, and 12, 24, and 48 Vdc output options for DC loads such as RTUs, PTZ cameras, wireless access points, and small cells.
• TSI Raptor Advanced Power Management Line (Falcon, Sparrow Hawk, Red Tail, Merlin) Advanced power management sub-brand comprising Falcon (Continuous Voltage Regulator/CVR), Sparrow Hawk (Momentary Voltage Restorer/MVR without energy storage), Red Tail (Voltage Loss Compensator/VLC with ultracapacitor or battery energy storage), and Merlin (Continuous Voltage Conditioner/CVC) products.
• Custom Power Quality Solutions Custom-engineered power quality solutions developed to meet specific critical-application requirements, including custom DC UPS units and bespoke configurations for unique power management challenges.
• MBS-5000 Maintenance Bypass Switch NEMA-3R/IP44 all-weather maintenance bypass switch that allows maintenance of TSI Power equipment without interruption of power to the connected load.
• UPS Battery Heater Battery heating solutions available in 35W and 70W outputs at 120V and 230V to prevent negative effects of cold temperatures on UPS performance in outdoor environments.
• Outdoor Mounting Brackets (Pole-Mount PM series and Pad-Mount PAD series) Outdoor mounting brackets supporting wall, pole, and pad mounting of UPS enclosures.

Quantifiable outcome

• VRP units eliminated approximately INR 2 million ($25,000) in annual costs from burnt robot controller cards
• +3 more outcomes

Named customers7 records

Segments6 records

Ideal customer profiles4 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature8 records

Scale indicators2 records

Recent moves1 record

Expansion highlights5 records

Direct peers

• Staco Energy Products: Staco Energy Products manufactures voltage regulators, UPS systems, and power conditioning equipment for industrial, commercial, and military customers. It is one of the closest direct competitors to TSi Power's VRP/VRX/ILC/ATS portfolio, with overlapping product categories and comparable rugged/outdoor offerings.
• Falcon Electric: Falcon Electric makes rugged industrial UPS systems and frequency converters designed for harsh environments and mission-critical applications. Its product range closely parallels TSi Power's outdoor AC/DC UPS lines targeting telecom, industrial, and government customers.
• Controlled Power Company: Controlled Power Company manufactures UL 60601-1 medical-grade isolation transformers and industrial power conditioning equipment. Its hospital-grade isolation line conditioners directly overlap with TSi Power's ILC MED series.
• AMETEK Solidstate Controls: AMETEK's Solidstate Controls business produces industrial UPS systems designed for harsh environments including oil & gas, power generation, and process industries - a direct functional analog to TSi Power's outdoor XUPS family.
• Alpha Technologies (EnerSys): Alpha Technologies supplies outdoor UPS, power conversion, and surge protection products to the broadband, telecom, and cable industries. Its outdoor UPS portfolio substantially overlaps with TSi Power's pole-mounted outdoor DC UPS targeting wireless and surveillance infrastructure.
• SolaHD (Emerson / Vertiv): SolaHD produces industrial power protection, UPS, transformers, and power conditioning products for harsh industrial environments. It is a direct peer in voltage regulation and isolation products serving factory automation and process customers similar to TSi Power's verticals.

Broad incumbents

• Eaton: Eaton is a global power management leader offering industrial UPS, voltage regulators, surge protection, and power conditioning across the full electrical stack. As a broad incumbent, Eaton overlaps with every TSi Power product category but at much greater scale and through broad channel distribution.
• Schneider Electric: Schneider Electric provides industrial UPS, voltage regulation, and power quality solutions through its APC and Industrial Automation portfolios. It competes with TSi Power at the high end of UPS and power conditioning while also serving the broader industrial and data center markets.
• ABB: ABB manufactures power quality, power protection, and industrial UPS equipment as part of its broader electrification portfolio. Its power conditioning and surge protection offerings compete with TSi Power's voltage regulators and line conditioners in industrial and utility contexts.
• Siemens: Siemens produces industrial UPS, SITOP power supplies, and voltage conditioning products as part of its Smart Infrastructure portfolio. It competes with TSi Power's rugged industrial offerings in factory automation and critical-infrastructure applications.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights7 records

Customer concentration

• Xx.com/TSiPowerCorp
• Facebookfacebook.com/pages/category/Business-Service/TSi-Power-289161361291473
• LinkedInlinkedin.com/company/tsi-power
• Instagraminstagram.com/tsipower

Compliance6 records

Revenue estimate

Valuation estimate

Number of profiles

Subsidiaries1 record

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about TSi Power Corporation