Ronk
Ronk Electrical Industries is a 75+ year-old, Illinois-based US manufacturer of phase converters, transfer switches, generator tap boxes, meter sockets, and power quality equipment serving utilities, agriculture, oil and gas, healthcare, and industrial customers across the United States via a regional rep agency network.
- Company typePrivate
- Founded1950
- HeadquartersNokomis, United States
- Headcount11–50
- GTM typeB2B
- OfferingHardware or Manufacturing
What Ronk does
Ronk Electrical Industries, LLC is a privately held US manufacturer of electrical power management equipment headquartered and produced in Nokomis, Illinois. Founded in 1950 as System Analyzer Corporation by LeRoy B. Ronk, the company has operated continuously for over 75 years, serving agriculture, oil and gas, water/wastewater, utilities and electric co-ops, healthcare, data centers, government, HVAC, and commercial/industrial customers. Its product portfolio centers on single-to-three-phase power conversion (static ADD-A-PHASE and ECONO-PHASE converters, rotary ROTOVERTER and ROTO-CON systems, and the 2024 ELECTRO-PHASE digital converter), backup-power transfer switching (METER-RITE and POWERTRON MTS/ATS tap boxes and switches), meter sockets (MSB product line), stray voltage isolation (BLOCKER), and power factor correction panels, plus UL67/UL508A/UL817/UL891 contract manufacturing services for panelboards, switchboards, control panels, and wire harnesses.
The underlying technology relies on autotransformer-capacitor designs (ADD-A-PHASE), tapped-winding rotary converters (ROTOVERTER), and patented tap box architectures (POWERTRON) that integrate phase rotation monitors, transfer switches, and molded case breakers. RONK holds UL891, UL508A, UL817, UL67, and UL1008 certifications and complies with NEC 2020 and NEC 2023, certifications that gate access to utility, healthcare, and government end markets. RONK does not produce AI/ML products; its only software asset is Powrsoft, described as advanced power management software.
The business model is a combination of catalog hardware sales (phase converters, transfer switches, tap boxes, meter sockets, blockers, power factor correction panels) and custom contract manufacturing services, with revenue generated through quote-based, one-time/perpetual pricing. Distribution is exclusively indirect, via eight or more regional electrical manufacturer rep agencies covering essentially the entire United States, supplemented by a dedicated sales team, a Quick Ship program for stocked SKUs, and online technical documentation and educational content. Enterprise relationships with utilities such as Ameren, AEP, Duke Energy, Xcel Energy, and ComEd anchor a meaningful share of meter socket revenue, while agriculture remains the primary vertical.
Ronk firmographics
Firmographics- Name
- Ronk
- Legal name
- Ronk Electrical Industries, LLC
- Website
- https://ronkelectrical.com
- Company type
- Private
- Founded year
- 1950
- Operating status
- Operating
- Headcount range
- 11–50 employees
- Short description
- Ronk Electrical Industries is a 75+ year-old, Illinois-based US manufacturer of phase converters, transfer switches, generator tap boxes, meter sockets, and power quality equipment serving utilities, agriculture, oil and gas, healthcare, and industrial customers across the United States via a regional rep agency network.
- Ownership category
- akta.pro rank
Ronk industry classification
Industry- Product category
- Electrical Power Management Equipment
- NAICS
- Switchgear and Switchboard Apparatus Manufacturing (335313), Power, Distribution, and Specialty Transformer Manufacturing (335311), Electrical Equipment Manufacturing (33531), Motor and Generator Manufacturing (335312)
- SIC
- Switchgear & Switchboard Apparatus (3613), Electrical Industrial Apparatus (3620), Power, Distribution & Specialty Transformers (3612)
- akta.pro primary industry
- Industrial Control Cabinets & Power Distribution (Panels, Switchgear for Automation) (IMAHAHAK)
- akta.pro secondary industries
- Low-Voltage Switchboards & Panelboards (LV distribution panels, MCCs, switchboards) (IMAGAEAA), Power Transformers, Reactors & Auxiliary Power Systems (EUADACAJ), Power Electronics & Grid-Tie Equipment Manufacturing (Converters, Transformers, Switchgear) (EUAMAHAH)
Keywords
Where Ronk is headquartered
LocationHeadquarters
- HQ city
- Nokomis
- HQ country
- United States
- HQ region
- North America
Offices1 record
Markets served
Ronk business model
Business model- GTM type
- B2B
- Offering type
- Hardware or Manufacturing
- Cost components
- Supply Chain, Personnel, Operations, Marketing or Sales, Technology or R&D, Infrastructure
Revenue model
- Hardware Product Sales: Sale of electrical equipment including phase converters, transfer switches, docking stations/tap boxes, meter sockets, power factor correction panels, and related accessories. Products are sold through distributor network and direct sales team.
- Contract Manufacturing Services: Custom product fabrication including panelboards, switchboards, control panels, and wire harnesses built to UL specifications for specific project needs.
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| One time/ perpetual license | Pay-as-you-go | Standard Products |
Go-to-market motion1 record
Distribution channels9 records
Marketing channels7 records
Ronk product offering
Product offeringCore offering
RONK designs, manufactures, and sells electrical power management equipment — including static, rotary, and digital phase converters; generator tap boxes and transfer switches; meter sockets with circuit breakers; stray voltage isolators; and power factor correction panels — plus custom contract-built panelboards, switchboards, control panels, and wire harnesses. All products are American-designed and assembled in Nokomis, Illinois, and sold primarily to utilities, agricultural operators, oil and gas, water/wastewater, healthcare, government, and industrial customers across the United States.
Product overview
RONK ELECTRICAL INDUSTRIES is a manufacturer of electrical power solutions with a portfolio centered on phase conversion technology, power transfer switching, and power quality products. The core offerings include static phase converters (ADD-A-PHASE®, ECONO-PHASE®), rotary phase converters (ROTOVERTER®, ROTO-CON®, ROTO-Load Center), and digital phase converters (ELECTRO-PHASE®). The POWERTRON® line, acquired in 2022, provides generator tap boxes, manual transfer switches (MTS), and automatic transfer switches (ATS) in various series (Contractor, Standard, Breaker, Interlocked Breaker, Dual-Purpose). Supporting products include METER-RITE® switches, Source Isolation Switches, Meter Sockets with Circuit Breakers (MSB), Blocker® stray voltage isolators, and Power Factor Correction Panels. The Meter-Rite® Side-by-Side combines transfer switching with metering in a single enclosure. Contract Services offers custom panelboards, switchboards, control panels, and wire harnesses under UL certifications. All products are American-designed and assembled in Nokomis, IL.
Differentiator
Problem solved
Functional benefit
Brands
- POWERTRON: Emergency power solutions including generator tap boxes, transfer switches, and docking stations
- Meter-Rite
- Add-A-Phase
- Econo-Phase
- Roto-Con
- Rotoverter
- Powrsoft
- Electro-Phase
- Blocker
Products and services
- ADD-A-PHASE Static Phase Converter
- ECONO-PHASE Shifter Static Phase Converter
- ROTOVERTER Rotary Phase Converter
- ROTO-CON Rotary Phase Converter
- ROTO-Load Center Customized Converter System
- Powrsoft Power Management Software
- ELECTRO-PHASE Digital Phase Converter
- POWERTRON Generator Tap Boxes
- POWERTRON ATS Series Automatic Transfer Switch Tap Boxes
- POWERTRON MTS Series Manual Transfer Switch Tap Boxes
- POWERTRON Dual-Purpose Series Tap Boxes
- METER-RITE Switches
- Meter-Rite Source Isolation Switch
- Meter Sockets with Circuit Breakers (MSB)
- Blocker Stray Voltage Isolator
- Power Factor Correction Panels
- Contract Services - Custom Panelboards, Switchboards, Control Panels, and Wire Harnesses
Quantifiable outcome
- ADD-A-PHASE achieves 97% energy efficiency with no-load losses limited to very small excitation losses in the autotransformer
- +2 more outcomes
Companies that use Ronk
Customer profileNamed customers9 records
Segments9 records
Ideal customer profiles5 records
Ronk technology and API
TechnologyTechnology focussed No
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Feature5 records
Ronk partnerships and signals
Strategic signalPartnerships
Nine partnerships are on record, tiered core.
- Powertron CorporationcorePowertron Corporation was acquired by RONK ELECTRICAL INDUSTRIES in 2022. Powertron was a generator sales and service company that evolved into a leader in emergency power solutions, particularly in generator tap box manufacturing. The acquisition brought the POWERTRON product line under RONK.
- Biben Sales Corp.coreElectrical manufacturer rep agency covering Pennsylvania, New Jersey, Delaware, Maryland, West Virginia, D.C.
- Bell & McCoy CompaniescoreElectrical manufacturer rep agency covering Texas, New Mexico, Mississippi, Louisiana, Arkansas, Tennessee, Oklahoma.
- Casey Electric SalescoreElectrical manufacturer rep agency covering Nebraska, Iowa, Wisconsin (Northern, Eastern and Southern WI).
- Shepard Sales CompanycoreElectrical manufacturer rep agency covering North Dakota, South Dakota, Minnesota, Western Wisconsin.
- United Electrical SalescoreElectrical manufacturer rep agency covering Florida, Alabama, Georgia, North Carolina, South Carolina, Virginia.
- Young & Champagne Electrical SalescoreElectrical manufacturer rep agency covering Indiana, Michigan.
- Electrical Agencies Company (EAC)coreElectrical manufacturer rep agency covering Colorado, Wyoming, Utah, Arizona, Nevada, Montana, Idaho.
- New England Solutions Group (NESG)coreElectrical manufacturer rep agency covering Maine, Connecticut, Vermont, New Hampshire, Massachusetts, Rhode Island, New York (excluding specific NYC boroughs).
Scale indicators4 records
Recent moves8 records
Expansion highlights5 records
Ronk competitors and assessment
Company assessmentDirect peers
- ASCO Power Technologies: A Schneider Electric subsidiary that designs and manufactures UL1008 transfer switches and emergency power control equipment. Directly comparable to Ronk's POWERTRON MTS and ATS tap box/transfer switch product lines serving healthcare, data center, and commercial customers.
- Generac Power Systems: Major manufacturer of backup generators and accompanying transfer switches and tap boxes. Competes directly with Ronk's POWERTRON emergency power portfolio, particularly in retail, healthcare, and commercial backup-power applications.
- Hubbell: Large US electrical products manufacturer with strong positions in meter sockets, enclosures, and wiring devices. Directly comparable to Ronk's MSB meter socket line serving utilities such as Ameren, AEP, and Duke Energy.
- Milbank Manufacturing: Privately held US manufacturer specializing in meter sockets, enclosures, and power distribution equipment for utility and electrical distribution markets. Closely comparable to Ronk's MSB meter socket and POWERTRON tap box offerings through similar utility and distributor channels.
- Russelectric: Manufacturer of power control systems, transfer switches, and switchgear for critical facilities including healthcare and data centers. Directly competes with Ronk's UL1008-certified transfer switch and switchboard offerings.
- Phase-A-Matic: Specialty manufacturer of static and rotary phase converters for agricultural, industrial, and rural applications. Most direct niche competitor to Ronk's ADD-A-PHASE, ROTOVERTER, and ECONO-PHASE product families.
Broad incumbents
- Eaton: Global power management company with extensive switchgear, switchboard, transfer switch, and power distribution portfolios. Competes with Ronk across most product lines but operates at vastly larger scale with broader industrial and utility reach.
- Schneider Electric: Global electrical equipment manufacturer covering switchgear, panelboards, transfer switches, and power management. Comparable to Ronk's contract-services switchboard/panelboard offering and competes through its ASCO subsidiary in transfer switches.
- ABB: Global industrial and electrical equipment leader covering switchgear, transformers, and power distribution products. Overlaps with Ronk's switchboard and power quality portfolios but operates at much larger scale across industrial automation and electrification markets.
- Siemens: Diversified electrical equipment and industrial manufacturer with strong switchgear, panelboard, and power distribution portfolios. Overlaps with Ronk's UL-certified switchboard and panelboard contract manufacturing across utility and industrial markets.
Market position
Strengths5 records
Weaknesses5 records
Competitive moat5 records
Key risks6 records
Key highlights7 records
Customer concentration
Ronk social profiles
Digital presenceRonk compliance and trust
Trust signalCompliance7 records
Ronk financial estimates
Financial estimateRevenue estimate
Valuation estimate
Ronk leadership team
Management profileNumber of profiles
Ronk subsidiaries and ownership
Company hierarchySubsidiaries1 record
Ronk funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Ronk M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about Ronk
What does Ronk do?
RONK designs, manufactures, and sells electrical power management equipment — including static, rotary, and digital phase converters; generator tap boxes and transfer switches; meter sockets with circuit breakers; stray voltage isolators; and power factor correction panels — plus custom contract-built panelboards, switchboards, control panels, and wire harnesses. All products are American-designed and assembled in Nokomis, Illinois, and sold primarily to utilities, agricultural operators, oil and gas, water/wastewater, healthcare, government, and industrial customers across the United States.
Is Ronk a public or private company?
Ronk is a private company. It is classified as founder individual operated bootstrapped and is currently operating.
When was Ronk founded?
Ronk was founded in 1950. It employs 11 to 50 people.
Where is Ronk based?
Ronk is headquartered in Nokomis, United States, in the North America region.
How does Ronk make money?
Two revenue lines are on record. Hardware Product Sales are the primary driver. The others are contract Manufacturing Services.
Who are Ronk's main competitors?
Direct peers on record are ASCO Power Technologies, Generac Power Systems, Hubbell, Milbank Manufacturing, Russelectric and Phase-A-Matic. Broad incumbents are Eaton, Schneider Electric, ABB and Siemens.
Does Ronk have an API?
No public API is recorded for Ronk.
What industry is Ronk in?
Ronk's product category is Electrical Power Management Equipment. Its primary akta.pro industry code is IMAHAHAK, Industrial Control Cabinets & Power Distribution (Panels, Switchgear for Automation), with a secondary code of IMAGAEAA, Low-Voltage Switchboards & Panelboards (LV distribution panels, MCCs, switchboards). Its NAICS code is 335313 and its SIC code is 3613.