Detailed design (DC/AC) for PV, Wind and BESS
We deliver integrated DC and AC detailed design for PV, Wind and BESS projects, including IT and SCADA integration—providing a robust basis for procurement, construction and commissioning.
Detailed design
with greentech
We design your PV, wind or BESS project to a level of technical detail that enables project owners to tender on a robust basis and allows EPCs to move quickly into procurement and construction. To achieve this, we consolidate DC and AC (electrical) design into a consistent plan set and define clear interfaces for implementation. From this point onward, we also address plant control and the required network environment in concrete terms - so that SCADA integration, data points and remote access are prepared cleanly and securely from the outset.
What you receive: project documentation ready for procurement, construction and commissioning
We produce implementation-ready detailed design for PV, Wind and BESS, providing EPCs and project stakeholders with clear foundations for procurement, construction and commissioning. Depending on the project setup, we treat photovoltaics, wind and battery storage equally - ensuring consistent interfaces between DC, AC and the SCADA/IT environment.
Components of detailed design
for PV projects
We develop the generator side up to the inverter and the AC grid connection in accordance with the applicable grid code up to the grid connection point, so that execution, testing and commissioning can be planned reliably. In doing so, we define the interfaces to plant control and the IT environment (SCADA integration, data points, remote access) so that operations and handover are prepared cleanly from the outset.
Design & construction preparation
Implementation-ready documentation for installation and site logistics, ensuring routes, trenches and positions are clearly defined.
Overview/site plans with plant design (PV field, inverter/substation positions, roads/fence)
Route/cable trench alignments incl. typical cross-sections
Position and detail drawings for relevant construction points (e.g., substations, handover points)
DC detailed design (up to the inverter)
Specific requirements for interconnection, DC cabling and grounding on the generator side.
String/interconnection logic (e.g., string plan / string overview)
DC cable concept (types/lengths, routing, losses as a plausibility check)
Grounding and equipotential bonding concept (incl. drawings)
AC detailed design / electrical design according to grid code (up to the grid connection point (MV/HV))
Implementation documentation for the AC connection at medium-voltage and - depending on the connection - high-voltage level up to the grid connection point, designed for generation operation and commissioning of the PV plant.
Preparation of single-line diagrams (SLD)
Calculation of active power losses
Reactive power calculation
Metering concepts
SCADA & IT
As part of the detailed design, we develop and implement - aligned with the plant design - a coherent SCADA & IT setup. We design, implement and document project-specific plant communications and lay the groundwork for secure remote access, SCADA/control-room integration, O&M workflows, and plant-level control.
Implementation of the project-specific IT network and communication environment (incl. roles & permissions concept)
Configuration of the data points, signals and interfaces relevant for operation and control (incl. data point list/mapping and handovers to the involved systems)
Project-specific documentation and technical support through to commissioning/acceptance
Optional: support during later operations to ensure permanently secure and reliable communication and control
Components of detailed design for BESS projects
(standalone or co-location)
We develop the electrical integration of the storage system - including the battery inverter (PCS) and associated interfaces - up to the grid connection point and create clear foundations for installation, connection and commissioning. In addition, we consider the interfaces to plant control and the SCADA/IT environment (communication interfaces, data points, remote access) - and, for co-location, also where PV and BESS interact in operation and control.
Design & construction preparation
Documentation for installation, routing and civil interfaces, ensuring installation and site workflows can be planned reliably.
Installation/positioning logic of the main components (e.g., containers/skids)
Cable routes/duct runs as a basis for civil works and cable laying.
Site and handover points as interfaces to EPC/trades
BESS system integration (battery system & battery inverter)
Interfaces and boundary conditions to ensure the storage integration can be implemented unambiguously from a technical perspective.
Interfaces between the battery system, battery inverter and electrical infrastructure
Foundations for commissioning and functional coordination (system boundaries, responsibilities)
Integration into the project-side documentation and power transfer logic
AC detailed design / electrical design according to grid code up to the grid connection point (MV/HV)
Detailed AC electrical design at medium-voltage and - depending on the connection - high-voltage level up to the grid connection point, including the relevant operating cases for charging and discharging (for co-location aligned with PV).
Preparation of single-line diagrams (SLD)
Calculation of active power losses
Reactive power calculation
Metering concepts
SCADA/IT interfaces (incl. co-location)
As part of the detailed design, we develop and implement - aligned with the plant design - a coherent SCADA & IT setup for your BESS. For co-location (PV or Wind + BESS), we consider shared park communication and a clean separation where responsibilities, data flows or security requirements demand it. This creates the prerequisites for secure remote access as well as for the SCADA/control-room integration, O&M workflows, and plant-level control.
Implementation of the project-specific IT network and communication environment for BESS (incl. roles & permissions concept)
Configuration of the data points, signals and interfaces relevant for operation, dispatch and control (incl. to inverter/battery system, park controller/grid control, direct marketing/control room - depending on the project setup)
Project-specific documentation and technical support through to commissioning/acceptance (incl. coordinated handovers for operations and maintenance)
Optional: support during later operations to ensure permanently secure and reliable communication and control
Components of detailed design
for wind projects
We produce implementation-ready detailed AC design documentation for wind energy projects - providing a robust basis for procurement, construction and commissioning. In doing so, we define clear interfaces between plant/park infrastructure, the electrical connection up to the grid connection point, and the SCADA/IT environment.
AC detailed design / electrical design according to grid code (up to the grid connection point (MV/HV))
Detailed design for the AC connection up to the grid connection point, designed for generation operation and commissioning.
Creation of a single-line diagram (SLD)
Calculation of active power losses
Reactive power calculation
Creation of metering concepts
SCADA & IT
As part of the detailed design, we develop and implement - aligned with the detailed plant design - a coherent SCADA & IT setup for your wind farm. We design, implement and document the project-specific communication and data integration of the WPP as well as the park infrastructure, and create the prerequisites for secure remote access as well as for the SCADA/control-room integration, O&M workflows, and plant-level control.
Implementation of the project-specific IT network and communication environment (incl. roles & permissions concept)
Configuration of the data points, signals and interfaces relevant for operation and control (incl. data point list/mapping and handovers to the involved systems)
Project-specific documentation and technical support through to commissioning/acceptance
Optional: support during later operations to ensure permanently secure and reliable communication and control
When is detailed design for PV and BESS with greentech beneficial?
When you move from permitting / preliminary design into implementation
As soon as the plant concept is defined and the permitting situation has been clarified, detailed design is required to technically specify the design and make it usable for procurement, construction and commissioning - without breaks between “concept” and implementation.
When DC and AC detailed design should fit together seamlessly
We integrate DC and AC detailed design so that there are no breaks between the generator/storage side and the grid connection, and all interfaces are optimally aligned.
When you want to technically safeguard tendering and procurement
With a fully specified detailed design, bills of quantities become more robust, bids more comparable, and technical change orders during construction are more likely to be avoided.
When you have high requirements for clean documentation and handover
We structure the destailed design documents clearly and with version control, so EPCs and project stakeholders can work with it directly - through construction and commissioning.
When you want to reduce risks before construction starts
Clean detailed design documents avoid typical project bottlenecks such as conflicting plan versions, unclear interfaces or late technical changes.
When you need an independent review of third-party design (Owner’s Engineer)
As part of a Technical Due Diligence, we carry out design reviews of external detailed designs and make risks and ambiguities transparent at an early stage.
Detailed design: complete or in sub-packages
We offer our detailed design for PV, wind and BESS as a complete package - and, if required, also in individual sub-packages. This is beneficial if you cannot cover certain services in-house or wish to implement an EPC-light concept. Even for partial scopes, we ensure clean interfaces and a consistent data set so that DC, AC and SCADA/IT fit together precisely during implementation.
Our approach
We guide you through the process in a structured manner: from the initial assessment to receiving your standards-compliant, requirements-compliant, implementable detailed design documentation.
Project setup & input check
We review the existing design status and clarify objectives, boundary conditions and responsibilities. This ensures that all parties work with the same assumptions and data.
Define interfaces & scope
We define handover points between DC, AC and SCADA/IT as well as to the EPC and other project parties. If required, we delineate partial scopes so they can be integrated without friction losses.
Develop detailed design (DC/AC incl. SCADA/IT interfaces)
We refine the design iteratively and consistently—with a focus on implementability for procurement, construction and commissioning. In doing so, we maintain clear version control of plan statuses.
Plausibility check & quality assurance
All results are reviewed professionally and consistently according to the four-eyes principle and cross-checked for interface consistency. This reduces typical sources of error before they become costly in procurement or construction.
Handover & Q&A with EPC/project team
We hand over the documentation in a structured manner and clarify open points in a Q&A session. This ensures a clean handover for implementation and prevents start-up losses on site.
6 good reasons for detailed design with greentech
Integrated DC/AC perspective instead of interface gaps
We consolidate the generator/storage side and the grid connection into a consistent data set—with specialized teams for DC system engineering, AC electrical design and plant IT. This reduces friction between trades and minimizes redesign during the construction phase.
Implementation-ready design for EPC, procurement and site
We deliver detailed design so it can be used directly for procurement, installation and commissioning - not as a “concept”, but as a handover basis.
Interfaces clearly defined - including to plant control
We treat SCADA/IT interfaces as an integral part of the detailed design, ensuring data points, remote access and control are prepared cleanly for implementation.
Quality assurance through the four-eyes principle
Our results are consistently reviewed according to the four-eyes principle. This increases documentation consistency and reduces typical sources of error before construction starts.
Practical know-how from construction and operations - considered in the design
We bring experience from implementation and operations management into the detailed design—so the plant can not only be built, but also operated efficiently later on.
If desired, we support you beyond the design phase
In addition to detailed design, we can also support you, if required, with technical EPC tendering and independent construction supervision. This ensures interfaces and quality requirements remain clearly in view during awarding and construction.
FAQ: Detailed design
Frequently asked questions about detailed design for PV, wind and BESS
What is the difference between preliminary design and detailed design?
During preliminary design, the plant concept is developed and coordinated. Detailed design specifies this concept technically to the extent that procurement, construction and commissioning can be prepared reliably.
When is the right time for detailed design?
As soon as the plant concept is defined and the required building permit is in place or the permitting situation has been clarified and the project moves into tendering, procurement and construction preparation.
What does the customer receive at the end of the detailed design?
Implementation-ready detailed design documentation for DC- and AC-side construction as well as defined SCADA/IT interfaces—structured as a technical handover basis for EPC, procurement and site.
Does the offer apply equally to PV, wind, BESS and co-location projects?
Yes. We prepare detailed DC and AC designs for PV and wind as well as for BESS projects (standalone or co-location) and consider the respective interfaces.
Is SCADA/IT part of the detailed design?
We consider the relevant SCADA/IT interfaces as an integral part of the detailed design, ensuring plant control and the network environment are prepared cleanly and securely. If we develop a SCADA & IT concept, we also take care of implementation.
Can the customer commission only individual partial services from greentech?
Yes. You can commission the detailed design as a complete package or as partial services - for example, DC or AC design only.
How does greentech ensure quality and consistency?
Our results are reviewed according to the four-eyes principle and cross-checked for interface consistency. In addition, we work with standardized checklists and workflows in a project management tool, through which we systematically review interfaces and ensure all relevant points are covered—before issues become critical during awarding or construction.
Does greentech also provide support after the detailed design?
We also support you during awarding and construction - for example with technical EPC tendering or independent construction supervision.
Do you also review detailed designs prepared by third parties?
Yes. As Owner’s Engineer, we can carry out design reviews of external detailed designs on request (e.g., as part of a Technical Due Diligence) and make risks and ambiguities transparent at an early stage.
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Engineering & Technical Advisory
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Why work with greentech?
Years of experience
Employees active in 6 European countries
Projects in the development pipeline
Ground-mounted PV systems built
in technical consulting
in operational management
Your specialists for detailed design at greentech
Viola Hoffmann
Commercial Head of Engineering
As Commercial Head of Engineering at greentech, Viola Hoffmann is responsible for the commercial management of the engineering department. In her role, she connects technical project requirements with economic implementation – from offer and project costing to the further development of suitable commercial services within the engineering context. Viola Hoffmann has been active in the solar industry since 2017. She studied European Studies as well as International Business Administration and Politics (among others in the Netherlands and Copenhagen) and also brings experience from entrepreneurship and working in young, dynamic companies.
Johannes Liebich
Head of Engineering & Technical Advisory
Johannes Liebich ist Leiter des Teams „Engineering & Technical Advisory“ bei greentech. Er ist verantwortlich für die Planung und Umsetzung von Projekten, sowie die Entwicklung neuer Leistungen in der technischen Anlagenberatung. Johannes Liebich studierte Environmental Engineering mit dem Schwerpunkt Photovoltaik und ist seit 2011 in der Solarbranche tätig. Als erfahrener Technical Advisor liegt sein Schwerpunkt vor allem im Bereich Anlagenbau und -betrieb.
Jörn Carstensen
Chief Technical Officer (CTO)
In seiner Rolle als CTO bündelt Jörn Carstensen die Leitung aller technischen Bereiche der greentech Gruppe. Er ist verantwortlich für Anlagenbau, Engineering Services und Technisches Management. Ziel ist es, einheitliche Standards und Prozesse in allen technischen Bereichen bei greentech zu schaffen und so unternehmensweite Synergien, hohe Qualität und größtmögliche Transparenz sicherzustellen.
Jörn Carstensen kam 2014 als Business Development Manager zu greentech. Neben der Erschließung verschiedener europäischer Märkte baute er den Bereich Engineering & Technical Advisory auf. Von 2006 bis 2014 war er für die Conergy Group in verschiedenen internationalen Funktionen im Corporate und Business Development tätig. Zuvor arbeitete er für eine Beratungseinheit von Accenture und unterstützte Versorgungsunternehmen bei strategischen und organisatorischen Fragestellungen. Jörn Carstensen hat Wirtschaftsingenieurwesen mit Schwerpunkt Energie- und Umweltmanagement an den Universitäten Flensburg und Southampton studiert.
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