Semax

What Semax does

Semax AG is a privately held Swiss manufacturer and system integrator of smart metering infrastructure for energy utilities, headquartered in Cham, canton of Zug, with a second production facility in Steinhausen opened in 2024. Founded in January 2011 by Severin Fischer, the company designs, produces, and integrates electricity meters (eRS801, eRS301, eRS501 — developed with Ensor AG), the Amera HES head-end system with integrated key management and end-to-end encryption, the Amera DC 2.0 G3-PLC data concentrator, and a family of modular communication modules (M8-100 LTE, M8-110 Cat-M1, M8-340 Ethernet, M3 series). It is positioned as the only Swiss manufacturer of electricity meters for the energy utility sector, with cumulative shipments exceeding 450,000 units.

The business operates a hybrid revenue model combining hardware sales (meters and modules), subscription-based delivery of the Amera HES hosted on Semax infrastructure, professional services for process consulting, deployment and system integration, and recurring maintenance contracts via the Service Desk. It sells through a direct enterprise field-sales organization with dedicated German, French, and Italian-speaking specialists covering Swiss regional utilities, targeting a customer base of approximately 130-150 energy suppliers that includes large power companies (BKW, ewz, SAK) and small-to-medium municipal utilities. The company holds ISO 9001 and ISO 27001 certifications since 2018, is compliant with Swiss StromVV and IEC 61968-9, and received recertification of Amera HES through 2031 in January 2026.

Semax is founder-owned by Severin Fischer with a management team led by CEO Christian Büchlmann and is approaching its 15th anniversary in 2026 with nearly 100 employees. The company has steadily expanded its product portfolio (Amera HES in 2017, eRS801 in 2021, Amera DC 2.0 in 2023, M3-340 and Blue2Box in 2025), vertically integrated production into its Cham facility in 2022, and built an ecosystem of technology partners (Ensor, Swistec, Netinium, Encontrol, LMS Services, SoftProject). Geographic exposure remains solely Switzerland.

Name

Semax

Legal name

Semax AG

Website

https://semax.ch

Company type

Private

Founded year

2011

Operating status

Operating

Headcount range

51–100 employees

Short description

Semax AG is a privately held Swiss manufacturer of smart metering infrastructure, designing and producing electricity meters (eRS series), the Amera HES head-end system, and communication modules for approximately 130-150 energy utilities across Switzerland under StromVV and ISO 27001 certifications.

Ownership category

akta.pro rank

Product category

Smart Metering Equipment

NAICS

Instrument Manufacturing for Measuring and Testing Electricity and Electrical Signals (334515), Relay and Industrial Control Manufacturing (335314)

SIC

Instruments For Meas & Testing Of Electricity & Elec Signals (3825), Industrial Instruments For Measurement, Display, And Control (3823)

akta.pro primary industry

AMI Smart Meters (Electric) & Meter Hardware (EUADAFAA)

akta.pro secondary industries

Meter Installation, Exchange & Field Services (EUADAFAF), AMI/AMR Smart Meter Deployment & Operations (Head-End, Network & MDM) (EUAJACAD), Metering & Grid Measurement (Smart Meters, CT/VT, PQ Meters) (IMAGAAAH)

Keywords

• Smart electricity meters
• Head-end systems
• Smart metering infrastructure
• Data concentrators
• Energy utility solutions

Headquarters

HQ city

Cham

HQ country

Switzerland

HQ region

Europe

Offices2 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Smart Electricity Meters: Sale of proprietary electricity meters (eRS801, eRS301, eRS501) and communication modules. Hardware sales constitute core revenue with modular approach allowing customers to select communication options.
2. Amera HES Software/SaaS: Amera head-end system provided as hosted solution on Semax server infrastructure including hardware, OS, database and system licenses. Revenue from system hosting and maintenance.
3. Smart Metering Services: Comprehensive services including process consulting, deployment, system integration, operational support, and maintenance contracts. Services cover meter parameterization, communication engineering, system engineering, and interface digitization.
4. Maintenance Contracts: Ongoing maintenance contracts providing system updates, meter driver updates, interface maintenance, system health checks, backups, and detailed maintenance reports.

Go-to-market motion2 records

Distribution channels1 record

Marketing channels4 records

Core offering

Semax AG designs, manufactures, and supplies smart electricity meters (eRS801, eRS301, eRS501), data concentrators (Amera DC 2.0), and the Amera HES head-end system for Swiss energy utilities. The company provides end-to-end smart metering solutions including proprietary hardware, modular communication modules, head-end software, process consulting, system integration, and maintenance services compliant with the Swiss StromVV regulation.

Product overview

Semax offers a comprehensive smart metering portfolio consisting of certified products that work together seamlessly. The portfolio centers on three main product lines: Counter/iMG (electricity meters including eRS801, eRS301, and eRS501), measuring systems (Amera HES head-end system with Amera DC 2.0 data concentrator), and processes (intelligent processes for smart meter rollout and operation). The Amera HES serves as the central measuring system platform, connected via Amera DC 2.0 data concentrators supporting G3-PLC, LTE, and fiber communication. Smart electricity meters (eRS801 for direct measurement, eRS301 for transducer applications, eRS501 for medium voltage) feature modular communication modules (LTE, Cat-M1, Ethernet, fiber optic) and accessories (I/O boards, Blue2Box). The company provides complete services including process consulting, system integration, and a Service Desk for customer support.

Differentiator

Problem solved

Functional benefit

Brands

• Amera HES: Amera 2.0 Head-End System (HES) - a modern smart metering solution for energy suppliers in Switzerland, developed to meet requirements of the Electricity Supply Ordinance (StromVV).
• Ensor
• Blue2Box

Products and services

• Amera HES (Head End System) Amera 2.0 Head-End System is a modern measuring system for Swiss energy suppliers, developed to meet the requirements of the Electricity Supply Ordinance (StromVV) for automated measurement data collection and processing in smart metering and sub-metering applications. Recertified through 2031 with end-to-end encrypted communication.
• Amera DC 2.0 (Data Concentrator) G3-PLC data concentrator enabling communication via CENELEC A or FCC band with three-phase signal coupling, supporting WAN communication via Ethernet, FTTH, 2G/3G/4G and LAN via Ethernet/RS485. Provides the PLC link between the Amera system and the eRS801 meter.
• eRS801 Electricity Meter High-precision direct-reading electricity meter optimized for Swiss energy suppliers, combining high-performance measurement technology (certified Class 0.2S accuracy), modular communication technologies, and load management functions. Up to 100A continuous current (120A for construction site version).
• eRS301 Electricity Meter

Quantifiable outcome

• Amera HES successfully recertified for 2026-2031 with independent audit confirming data security compliance

Named customers5 records

Segments2 records

Ideal customer profiles2 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature6 records

Partnerships

Three partnerships are on record, tiered core.

• Ensor AGcoreStrategic or Co-development Partner · 1 January 2020Collaboration since 2020 for various smart metering projects. Semax sells Ensor electricity meters (eRS801, eRS301, eRS501) developed with Ensor, combining Ensor's measurement technology with Semax's system integration capabilities.
• Elster Honeywell (now Honeywell)coreChannel Partner/ Reseller/ Distributor · 1 January 2015Partnership established in 2015 as distribution partner for Switzerland. This foundational partnership shaped Semax's early years, characterized by personal service, on-site calibration, and AS3000/AS3500 meter manufacturing in Cham.
• ENSORcoreTechnology or IntegrationENSOR (sensor) company providing metering solutions integrated with Semax Amera system.

Scale indicators6 records

Recent moves13 records

Expansion highlights6 records

Market position

Weaknesses4 records

Competitive moat5 records

Key risks5 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/semax-ag

Revenue estimate

Valuation estimate

Number of profiles

Profiles7 records

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 Semax