{"id":65814,"date":"2026-06-08T19:56:38","date_gmt":"2026-06-08T17:56:38","guid":{"rendered":"https:\/\/o7wkziwp0p-staging.wpdns.site\/preliminary-design-yield-simulation\/"},"modified":"2026-10-26T15:51:31","modified_gmt":"2026-10-26T14:51:31","slug":"preliminary-design-yield-simulation","status":"publish","type":"page","link":"https:\/\/greentech.energy\/en\/preliminary-design-yield-simulation\/","title":{"rendered":"Preliminary Design & Yield Simulation"},"content":{"rendered":"
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Preliminary design & yield simulation<\/h1>for PV and BESS projects as well as substations<\/span>

We prepare preliminary designs for PV, BESS, and co-location projects with variant comparison and simulation-based yield forecasts, as well as preliminary designs for substations - providing a reliable foundation for early project decisions.<\/p>\n<\/div>

Inquire Now<\/a>Learn more<\/a><\/div><\/div><\/div><\/div>
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Determine technical potential<\/span> and obtain corresponding yield indication <\/h2>\n<\/div><\/div>\n<\/div>\n\n
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From site-specific system design to realistic yield forecast for PV, BESS, or co-location <\/strong><\/h3>\n

In the early project phase, a well-founded preliminary design provides the basis for realistically assessing the technical possibilities and associated yield potential of a site. Following a site and route analysis<\/a><\/span> or receipt of relevant documentation, we develop designs for substations as well as design variants for PV, BESS, or co-location projects according to customer requirements and objectives, demonstrating what installable capacity and land use are possible under the project-specific constraints.<\/p>\n

For PV projects, we derive a yield forecast from the results of corresponding simulations. The simulation is based on the system design and additionally considers irradiation and shading assumptions as well as key design parameters such as the DC\/AC ratio.<\/p>\n

For BESS projects, we derive the forecast at preliminary design level from the designed system configuration - particularly from power, capacity, and design duration - and contextualize it within project-specific constraints such as available grid connection capacity or feed-in limits. This creates a transparent decision-making basis for further project planning and next steps.<\/p>\n

In addition to PV, BESS, and co-location designs with yield simulation, we also support with preliminary designs for substations (SS) - as a drawing and coordination basis (without yield simulation).<\/p>\n

If you already have a fully designed or constructed PV system in your portfolio and are considering expanding the existing design with a battery storage system, you will also need a preliminary design. We are happy to support you here or determine the optimal, technically feasible, and economically most advantageous configuration of your BESS through our co-location potential analysis<\/a><\/span>.<\/p>\n<\/div><\/div>\n<\/div>\n<\/div>\n\n

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When you should consider a preliminary design (with yield simulation)<\/span><\/h2>\n<\/div><\/div>\n<\/div>\n\n
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When you need to assess site potential for PV and\/or BESS early regarding technical feasibility and yield prospects<\/h3>

A preliminary design with yield forecast shows whether a site is suitable for a PV or BESS project and forms the basis for further design optimizations. <\/p>\n<\/div><\/div>\n\n

When you need to coordinate or secure a substation site<\/h3>

An preliminary design creates a reliable basis for coordination with owners, authorities, or grid operators - e.g., in the context of site selection and development.<\/p>\n<\/div><\/div>\n\n

When you want to compare multiple design variants<\/h3>

If a preliminary design is fundamentally plausible, the design is refined through targeted iterations (e.g., row spacing, tilt angle, DC\/AC, infrastructure) to further improve land use and yield potential. This creates transparency about which configuration makes most sense at the site.<\/p>\n<\/div><\/div>\n\n

When you want to determine the effects of topography and shading on future yield as accurately as possible<\/h3>

The quality of the design depends heavily on available site information (e.g., elevation profile, shading objects, non-buildable areas). If a 3D terrain model of the site with corresponding shading objects is available, the preliminary design can be created with centimeter precision and a correspondingly realistic yield forecast can be derived.<\/p>\n<\/div><\/div>\n\n

When grid connection capacity and feed-in limits determine the design<\/h3>

Available grid connection capacity should be considered early - it significantly influences the configuration and optimal design approach.<\/p>\n<\/div><\/div>\n\n

When you need to resolve conflicts between land utilization, performance, and practicability<\/h3>

Depending on row spacing and layout, you can either increase installable capacity (and usually total energy yield) or improve specific yield by reducing shading. A scenario comparison makes it clear which configuration best fits your constraints - including site access and long-term operability (maintenance, repairs, and vegetation management).<\/p>\n<\/div><\/div>\n\n

When you are preparing documentation for the building permit<\/h3>

The preliminary design is an essential component of building permit documentation for all project types, whether PV, BESS, co-location, or substation. A proper preliminary design provides the technical foundation and reduces subsequent redesigns.<\/p>\n<\/div><\/div>\n\n

When you need the basis for a yield assessment for project financing<\/h3>

A bankable yield assessment for PV or co-location projects requires reliable input parameters - particularly a consistent system layout (site plan) and transparent design assumptions. We provide this foundation so that yields can be realistically simulated and properly derived for banks\/investors.<\/p>\n<\/div><\/div>\n<\/div>\n<\/div>\n<\/div>\n\n

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Our Approach<\/h2>\n

Depending on the project setup (PV, BESS\/co-location, or substation), we set appropriate priorities in the preliminary design. For PV and BESS projects, we compare variants using suitable evaluation logic - from PV yield metrics to storage-related assessment parameters.<\/p>\n<\/div><\/div>\n<\/div>\n\n

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Kick-off: Clarify objectives, constraints, and data availability<\/h3>

We align on objectives and the most important design specifications - e.g., regarding grid connection\/feed-in, site boundaries, and permit-relevant requirements - and verify which documentation we need to create a design and, if applicable, a corresponding simulation.<\/p>\n<\/div><\/div><\/div><\/div>\n\n

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Develop design variants (layout & cabling)<\/h3>

We create an initial layout and develop variants based on it, for PV e.g., regarding row spacing, tilt angles, or DC\/AC configuration - always with a view to feasibility and future operations.<\/p>\n<\/div><\/div><\/div><\/div>\n\n

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Yield simulation & plausibility check<\/h3>

Based on the design variants, we simulate yields, evaluate loss assumptions, and verify results for consistency to ensure the forecast remains reliable and transparent.<\/p>\n<\/div><\/div><\/div><\/div>\n\n

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Variant comparison & recommendation<\/h3>

We present the results in a structured comparison (e.g., yield, risks, key assumptions) and derive a recommendation that fits the objectives and project phase.<\/p>\n<\/div><\/div><\/div><\/div>\n\n

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Results handover for the next project stage<\/h3>

You receive the design fundamentals and results prepared in such a way that they can be transferred to the next steps (e.g., tender, detailed design, or assessment\/funding).<\/p>\n<\/div><\/div><\/div><\/div>\n<\/div>\n<\/div>\n<\/div>\n\n

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Service spectrum for PV, BESS, Co-Location and substations<\/span><\/h2>\n<\/div><\/div>\n\n

Different project setup - different requirements: Preliminary designs and yield forecasts for PV, BESS,\u00a0 co-location and substation projects.<\/h3>\n<\/div><\/div>\n<\/div>\n<\/div>\n\n
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Photovoltaics (PV)<\/h3><\/div><\/div><\/div>\n\n
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Preliminary design<\/strong> (layout at preliminary design level) including variant development based on site and terrain information, shading objects, and any known building height requirements and grid connection information <\/p>\n<\/div><\/div><\/div><\/div>\n\n

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Yield forecast<\/strong> through simulation based on defined variants, including consideration of various irradiation data and shading analysis as well as classification of key assumptions\/loss factors <\/p>\n<\/div><\/div><\/div><\/div>\n\n

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Results preparation<\/strong> as a basis for next steps (e.g., tender, detailed design, financing)<\/p>\n<\/div><\/div><\/div><\/div>\n\n

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Optional analysis of expected levelized cost of electricity (LCOE)<\/strong> to support decision-making. Through greentech's own EPC and O&M divisions, we are able to view the project holistically and make correspondingly valid, up-to-date price assumptions. <\/p>\n<\/div><\/div><\/div><\/div>\n<\/div>\n\n

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Battery Energy Storage Systems (BESS)<\/h3><\/div><\/div><\/div>\n\n
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Preliminary design (layout\/site concept)<\/strong> for containers, battery inverters, and transformers - including basic access and maintenance logic<\/p>\n<\/div><\/div><\/div><\/div>\n\n

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Preliminary configuration at design level<\/strong>: Coordination\/derivation of target parameters such as power (MW) and capacity (MWh) (or C-rate\/target operation) and derivation of a suitable system\/container concept (within agreed scope)<\/p>\n<\/div><\/div><\/div><\/div>\n\n

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Evaluation logic depending on use case<\/strong>: e.g., standalone or grid-supportive (within agreed scope)<\/p>\n<\/div><\/div><\/div><\/div>\n\n

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Results preparation<\/strong> as a basis for further technical and economic specification.<\/p>\n<\/div><\/div><\/div><\/div>\n<\/div>\n<\/div>\n\n

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Co-Location (PV and BESS)<\/h3><\/div><\/div><\/div>\n\n
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Integrated design<\/strong>: Coordinated PV and BESS design as an overall system (site, infrastructure, operating logic), also possible for retrofitting an existing PV system.<\/p>\n<\/div><\/div><\/div><\/div>\n\n

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Grid-side constraints considered<\/strong>: Configuration at preliminary design level under requirements such as feed-in limitation, controllability, and grid-supportive requirements.<\/p>\n<\/div><\/div><\/div><\/div>\n\n

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Variant comparison<\/strong> with focus on technical feasibility and project objectives<\/p>\n<\/div><\/div><\/div><\/div>\n<\/div>\n\n

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Substation (SS)<\/h3><\/div><\/div><\/div>\n\n
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Preliminary design according to greentech standard<\/strong> for a substation site or pole location - as a reliable basis for coordination (e.g., with owners, authorities, or grid operators)<\/p>\n<\/div><\/div><\/div><\/div>\n\n

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Technical framework conditions & key planning constraints are considered in the design<\/strong> (e.g., plot, interfaces, site restrictions)<\/p>\n<\/div><\/div><\/div><\/div>\n\n

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Results preparation & handover of documentation<\/strong> including presentation of results as a basis for next steps (site decision, further planning\/applications)<\/p>\n<\/div><\/div><\/div><\/div>\n\n

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Optional: Prior technical consultation on site selection<\/strong> as well as site inspection (up to three potential substation sites\/pole locations)<\/p>\n<\/div><\/div><\/div><\/div>\n<\/div>\n<\/div>\n<\/div>\n\n

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Sound decision support<\/span>\u00a0for your project<\/h2>\n<\/div><\/div>\n<\/div>\n<\/div>\n\n
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Engineering with practical relevance from design, construction, and operations<\/h3>

We consider design variants not only \"on screen\" but with a view to future implementation and operation. This reduces planning discontinuities and creates a robust foundation for the next steps.<\/p>\n<\/div><\/div><\/div><\/div>\n<\/div>\n\n

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Established software for reliable designs and simulations<\/h3>

For preliminary designs, we use established 3D layout design software (e.g., AutoCAD\/PVcase). For simulation, we use PVsyst. This allows layout variants to be developed precisely and efficiently - even for complex sites.<\/p>\n<\/div><\/div><\/div><\/div>\n<\/div>\n\n

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Broad data basis instead of single-source approach<\/h3>

For yield simulations (PVsyst), we use multiple sources for irradiation and weather data, including DWD, SolarGIS, Meteonorm, or Copernicus. This increases the transparency and robustness of forecasts - particularly for site-specific characteristics.<\/p>\n<\/div><\/div><\/div><\/div>\n<\/div>\n<\/div>\n\n

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Recognized, high-quality results<\/h3>

Our design variants and yield forecasts are transparent and reliable, providing an optimal foundation for informed decisions. We prepare bankable PV yield assessments<\/a> and, as owner\u2019s engineer, also review external assessments.Thus, our results enjoy high confidence among banks, investors, and technical consultants.<\/p>\n<\/div><\/div><\/div><\/div>\n<\/div>\n\n

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Quality assurance through standards & four-eyes principle<\/h3>

Our results are produced according to clear internal standards and defined review and approval processes. Through systematic plausibility checks and a consistent four-eyes principle, we ensure that assumptions, input parameters, and outputs are consistent, transparent, and reliable. <\/p>\n<\/div><\/div><\/div><\/div>\n<\/div>\n\n

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Best practices through active committee and association work<\/h3>

We actively participate in industry associations in Germany and Europe and contribute to guidelines and best practices. The latest standards and current market developments flow into our engineering approaches for PV, BESS and substation projects, as does our many years of practical experience.<\/p>\n<\/div><\/div><\/div><\/div>\n<\/div>\n<\/div>\n<\/div>\n\n

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Our quality standards -transparent, reliable, documented<\/h2>\n<\/div><\/div>\n\n

We emphasize auditable results in the form of clear assumptions, consistent methodology, and proper documentation. This makes variants, risks, and influencing factors transparent - as a reliable foundation for the next steps.<\/p>\n

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