Modern electrical installations for business and industry.
We design and deliver advanced electrotechnical solutions for commercial, industrial and new-investment projects — from concept through commissioning to long-term service.
Engineering that powers modern investments.
Sell4 Sp. z o.o. is a modern electrotechnical company specialising in the end-to-end delivery of electrical installations and technical systems for business, industry and construction investments.
For years we have supported our clients in the design, deployment and service of modern infrastructure solutions, aligned with the highest standards of safety, performance and reliability.
We combine design expertise with hands-on execution know-how, delivering investments efficiently, on time and in line with the demands of the modern market.
We work exclusively with renowned manufacturers of electrotechnical technology, guaranteeing top-grade components and full compliance with all applicable standards.
Five foundations of partnering with Sell4.
Experience
Over a decade of projects for demanding investors — from class-A office buildings to industrial facilities.
Safety
Delivered in compliance with PN-HD 60364, ISO standards and our internal QA/QC procedures.
On-time delivery
Rigorous planning and progress reporting — investments handed over on the agreed schedule.
Modern technology
Proven top-tier systems, BIM-based design and integration of IoT and BMS platforms.
End-to-end delivery
A single partner from design through execution to service and upgrades — without subcontractors.
A full range of electrotechnical services in one place.
We design, supply and service electrical systems — from low-voltage telecommunication installations to advanced industrial automation and medium-voltage switchgear.
Electrical installations
Turnkey LV and MV installations for commercial and industrial facilities.
↗ SVC.02Switchgear & power supply
Prefabrication of LV/MV switchgear, backup power systems, UPS and generators.
↗ SVC.03Industrial automation
PLC, SCADA systems and integration of production lines with plant infrastructure.
↗ SVC.04Low-voltage installations
LAN, fibre-optic, CCTV and access-control networks — the telecom backbone of any facility.
↗ SVC.05Smart buildings
BMS, KNX, HVAC automation and premium-class lighting control systems.
↗ SVC.06Safety systems
Fire alarm, voice evacuation, access control and emergency lighting — protecting people and property.
↗ SVC.07Measurements & service
Periodic inspections, protection-effectiveness measurements and round-the-clock 24/7 monitoring.
↗ SVC.08Documentation & design
Executive designs, as-built documentation, BIM coordination and project handovers.
↗Sectors we serve.
We work with general contractors, developers and facility owners — delivering solutions tailored to the character of each investment.
Components from leading global manufacturers.
We work exclusively with premium-class technology, ensuring full standards compliance and long-term system reliability.
All trademarks belong to their respective owners. Sell4 is an authorised integrator of the listed manufacturers' solutions.
How we work.
A repeatable, transparent process — from the first brief to long-term service. Each stage with a dedicated project manager and full documentation.
Needs analysis
Investor brief, technical site audit and definition of normative requirements.
Design
Concept and executive design documentation, BIM coordination and cost estimates.
Execution
Execution by our own crews with continuous quality and schedule supervision.
Commissioning
Measurements, functional tests, technical handover and documentation transfer.
Service & support
Warranty, periodic inspections, upgrades and 24/7 service response.