Developers · Commercial · Public sector

Electrical and energy design — from the terraced house to the medium-voltage grid.

We plan for developers, mid-sized companies and public clients: pre-configured smart home solutions in series, control cabinets, photovoltaics and tenant electricity, battery storage in the megawatt range, emergency lighting and integrated energy concepts — under HOAI, across all work stages.

700+houses fitted out in series
1.5–2.5 MWstorage on the medium-voltage grid
Stages 1–9HOAI, all work stages
elektrofabrikInstallation from one source
Who we plan for

Four kinds of client, one standard.

Whether a repeatable solution built a hundred times over or large-scale storage at the grid connection point: the depth of planning stays the same.

Developers & residential development

Repeatable solutions instead of one-offs: pre-configured smart home packages that go in a hundred times over — predictable in cost, easy to install and understandable for the end customer. Plus electrical design, control cabinets, PV and tenant electricity for whole quarters.

Commercial & mid-sized business

We are the contact for mid-sized companies that want to know where their energy goes: metering concepts, evaluations, load analyses and the measures derived from them — from lighting through storage to generating your own.

Public sector & special buildings

Fire stations, nurseries and office buildings have their own requirements for emergency lighting, standby power and documentation. We plan to HOAI across all work stages — the installation is carried out by our sister company elektrofabrik if you wish.

Energy & large-scale storage

Battery storage in the megawatt range, connection to the medium-voltage grid, standby power concepts and whole energy strategies — designed and delivered together with specialist partners.

Services in detail

From the standard solution to large-scale storage.

Twelve disciplines we plan for commercial and public clients — commissioned individually or as a complete package.

01

Repeatable solution for developers

Pre-configured smart home packages for apartment and terraced housing schemes: a uniform scope of functions, repeatable distribution boards, clear installation instructions and an end-customer experience that works without training. Over 700 houses have been fitted out this way for the DORNIEDEN Gruppe.

02

Electrical design to HOAI

We plan in all work stages — from establishing the brief and preliminary design through design and approval to construction drawings, award, site supervision and documentation. As electrical specialist designers we work directly alongside the architect and the other specialist designers.

03

Control cabinet design & build

Distribution boards and switchgear are sized, drawn, built and documented — including circuit and terminal diagrams, thermal design, spare ways and test records. For external projects we supply fully built cabinets across national borders as well.

04

Photovoltaics for commercial & apartment buildings

Roof layout, shading and string design, inverter sizing, metering and measurement concept, grid connection and coordination with the network operator. On the SIDOL Lofts in Cologne this produced around 645 modules in 23 strings.

05

Tenant electricity schemes

From the meter structure through the metering concepts to the technical delivery: complex tenant electricity schemes for apartment buildings and whole quarters, planned so that they stay sound in metering terms and manageable in operation.

06

Battery storage & medium voltage

Large-scale storage projects with 1.5 to 2.5 MW of connected load on the medium-voltage grid: sizing, grid connection point, protection concept, siting and operation — currently ten projects together with our partner Power-Q.

07

Backup power & UPS

Battery standby power supplies and uninterruptible power supplies for buildings that must not fail: sizing the autonomy time, selectivity, test cycles and integration into the building management system.

08

Holistic energy concepts

Generation, storage, consumption and charging infrastructure thought of as one system — with load management, self-consumption optimisation and an operating strategy that matches the building's actual usage profile.

09

Metering concepts & monitoring

Smart metering systems and sub-metering structures make it visible where energy is wasted. We plan the metering points, evaluate the data and derive concrete measures from it — at Polaroid Film GmbH, for instance, as complete flow measurement with MID sensors, integrated into KNX.

10

Commercial lighting

Lighting design for offices, production, storage and external areas: illuminance levels and uniformity according to use, glare control at screen workstations, presence and daylight control, ease of maintenance and energy demand over the service life.

11

Safety & emergency lighting

Emergency lighting, escape route signs and central or decentralised supply with the associated testing and documentation requirements — planned for buildings in which every route has to be recognisable when it matters.

12

KNX reconstruction & BACnet

When nobody in a logistics hall, an office building or a production facility can get into the controls any more, we read out the system, reconstruct the ETS project and document it afresh. That includes programming special gateways to other trades over BACnet, Modbus and comparable protocols — so that the building management system, ventilation and cooling talk to each other again.

13

Interface to building services & HVAC

We work hand in hand with building services consultants, HVAC engineers and other specialist designers: shared interface schedules, agreed data points, clear responsibilities at the handover points. Electrical is the trade every other one depends on — which is exactly why we coordinate early instead of on site.

14

Installation with elektrofabrik

If you wish, it does not stop at the design: our sister company elektrofabrik carries out the work — with its own electricians, coordinated procedures and one contact from the first work stage through to handover.

Planning, tendering, site supervision and, if you wish, the complete installation — one point of contact across all work stages.

HOAI

Electrical services design in all work stages.

We work as specialist designers alongside the architect and the other specialist designers — commissioned in full or for individual stages.

HOAI stages 1–2

Basics & preliminary design

Clarify the brief, record the constraints, options with cost ranges — the stage at which the expensive decisions are still cheap.

Stages 3–4

Design & approvals

A worked-through design concept, calculations and verifications, documents for approvals and the grid connection.

Stage 5

Construction drawings

Construction-ready drawings down to terminal level: distribution boards, cable routes, outlets, interfaces to all trades.

Stages 6–7

Award

Tender specifications, quantities, appraisal of bids and an award recommendation — comparable rather than negotiable.

Stages 8–9

Site supervision & documentation

Supervision of the works, acceptances, defect tracking, documentation and handover to operations.

Proven

Projects that show the scale.

Over 700 houses

DORNIEDEN Gruppe

A pre-configured smart home solution in volume housing — uniform, easy to install and usable by the end customer without instruction.

100+ apartments

Eupener Straße high-rise, Cologne

Together with Wassermann we are currently designing the electrical and energy systems for a high-rise with more than a hundred residential units.

10 projects, 1.5–2.5 MW

Power-Q — large-scale storage

Battery storage systems on the medium-voltage grid: from sizing through to delivery, together with our partner Power-Q.

~645 modules

SIDOL Lofts, Köln-Braunsfeld

Photovoltaics with a tenant electricity scheme in the PARK LINNÉ quarter — 23 strings, delivered through elektrofabrik.

MID + KNX

Polaroid Film GmbH

Complete flow measurement with MID sensors at the German production site, fully integrated into the building automation.

ETS reconstructed

Logistics & existing buildings

Complex KNX reconstructions in logistics halls and commercial properties — including BACnet gateway programming to ventilation, refrigeration and the building management system.

HOAI stages 1–9

Fire stations, nurseries, office buildings

Public and commercial special-purpose buildings — planned to HOAI, delivered together with elektrofabrik.

Working together

This is how a project runs with us.

1

First conversation & needs

We clarify use, target group and commercial framework: series project or single building, owner occupation or letting, energy targets and operating model.

2

Concept & cost framework

Out of the requirement comes a technical concept with a cost estimate — for series projects including a model calculation per unit.

3

Design to HOAI

From preliminary design to construction drawings, coordinated with the architect, building services, structural engineering and the network operator. The result is documents any specialist contractor can work from.

4

Award & installation

Tendering and support through the award — or direct delivery through our sister company elektrofabrik. With site supervision and documented progress if you wish.

5

Operation & optimisation

After commissioning we remain your point of contact: evaluating measured data, refining operating strategies, planning extensions.

FAQ

Frequent questions from developers and commercial clients.

Do you also plan series projects for developers?

Yes, that is one of our main areas. For developers we build pre-configured smart home solutions that repeat identically across many units — with standardised distribution boards, clear installation specifications and controls that buyers understand without training. More than 700 houses were fitted out this way for the DORNIEDEN Gruppe.

Do you work to HOAI?

Yes, as specialist designers for electrical engineering we work through all HOAI work stages — from establishing the brief through design, approval and construction drawings to award, site supervision and documentation. Depending on the project we take on every stage or selected individual ones.

How large are the energy projects you look after?

The range runs from a photovoltaic installation on an apartment building to battery storage with 1.5 to 2.5 MW of connected load on the medium-voltage grid. Ten such storage projects are currently being delivered together with our partner Power-Q.

Can you also just plan, without carrying out the work?

Yes. Many clients commission the planning alone and award the installation themselves — our documents are built so that any specialist contractor can work from them. Anyone who wants both from one source gets the installation through our sister company elektrofabrik.

Our KNX system runs, but the ETS project has vanished — what now?

That is more common than many people think, and in commercial buildings it is particularly critical: without the project file, nobody can change anything any more. We read out the existing devices, establish individual addresses and group addresses, reconstruct the ETS project and document it completely anew. After that it belongs to you — including the group address list and a functional description. In logistics halls and production buildings we also bring other trades back in cleanly over BACnet and Modbus gateways.

Do you work with our building services or HVAC engineer?

Yes, that is the normal case. We agree interfaces and data points directly with building services consultants, HVAC engineers and other specialist designers — which values are exchanged, who supplies which data point, where the handover point lies. Electrical is the trade every other one depends on; the earlier this coordination runs, the less is improvised on site.

What does a metering concept achieve in an existing building?

Visibility. Smart metering systems and sub-meters make it possible to show which areas, plant or times actually consume energy — often quite differently from what was assumed. From the analysis we derive concrete measures, from lighting through load management to on-site generation and storage.

What building types do you plan in non-residential work?

Fire stations, nurseries, office and production buildings, among others. Alongside conventional electrical design, what matters there is emergency lighting, standby power supply, metering concepts and documentation that holds up in operation and before inspection bodies.

The first step

Let us plan your building project together.

Whether a repeatable scheme, a special building or an energy concept — let us talk about scope, work stages and programme.

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Prefer to call? +49 211 838 66 870