Commercial Solar Design Services

Solar Design Services for Developers

PV system design and engineering for developers, architects and contractors. MCS-accredited.

What's Covered on This Page

What Commercial Solar Design Services Are (and Who They Are For)
Design-Only Engineering vs Full EPC Installation
What Is Included in a Commercial PV Design Pack
How Commercial Solar Design Works: Four Steps from Project Brief to Handover
How Precision Design De-Risks Planning, Tender, and Yield
Project Fit, Limitations, and What Changes Scope
Example Design Pack: Mixed-Use Development
Frequently Asked Questions

Need Commercial Solar Design Services?

0161 570 0596

Get A Free Quote. Bee Solar is ready to help.

What Commercial Solar Design Services Are (and Who They Are For)

Commercial solar design services produce planning- and construction-ready electrical, structural, and storage engineering packs for property developers, architects, main contractors, and EPC firms, not panel sales or activation.

These services convert architectural drawings and project constraints into a coordinated set of technical documents that other parties can price, submit for approval, and build from.

Bee Solar provides these design services across the UK, with the commercial team reachable via a Manchester phone line. The service is a distinct product from installation, which means the buyer commissions drawings, calculations, and compliance documentation rather than a physical build. A design pack gives you the engineering certainty needed to go to tender, while installation is a separate contract for the build itself.

This is not a residential DIY permit service, and it does not follow US PE-stamp or Investment Tax Credit workflows. Modern design packs model battery storage and hybrid inverter layouts from the outset, not as a bolt-on after the electrical design is frozen.

Property Developers

Needing early feasibility studies and planning-ready packs before capital is committed.

Architects

Requiring BIM/Revit coordination, photorealistic renders, and shading analysis for client presentations and planning submissions.

EPC & Main Contractors

Needing tender-ready artefacts that can be priced accurately without redesign.

Design-Only Engineering vs Full EPC Installation

Design-only engineering is the right path when architectural drawings exist and the project needs independent engineering validation, planning and building-control documentation, and a tender pack that EPC contractors can price. Full EPC installation is more suitable when the client wants a single contractor responsible from design through to energisation and activation.

Decision Factor	Design-Only Engineering	Full EPC Installation
Client already has an installer	Yes, the design pack gives that installer a buildable specification	No, EPC brings its own design team
Project needs independent validation	Yes, the engineer checks stringing, structure, and compliance	No, the EPC validates internally
Planning or building control submission	Complete documentation pack provided	Handled by the EPC
Single-point responsibility	No, design and install are separate contracts	Yes, one contractor owns the full scope

This service stops at design sign-off and documentation handover, not grid energisation. If you require a turnkey installation, commercial installation is a separate Bee Solar service that can follow the design phase.

Mixing design inside an EPC contract too early can lock stringing, inverter choice, and hybrid layouts before structural and wind analysis and architectural BIM coordination are complete. That creates change-order risk. An independent design pack freezes the engineering first, so the EPC tender prices a firm scope rather than a moving target.

What Is Included in a Commercial PV Design Pack

A complete commercial PV design pack contains electrical schematics, structural calculations, visual coordination models, storage layouts, and named compliance citations ready for building control, planning boards, and EPC pricing.

Electrical Design

Full single-line diagrams (SLDs) showing the complete electrical architecture.
String layouts with inverter sizing matched to the array configuration.
Cable calculations for voltage drop and current-carrying capacity.
Earthing schemes ready for building control approval.

Structural and Wind Analysis

Roof structural assessments confirming load capacity.
Ballast calculations for flat roofs and low-slope installations.
Wind uplift modelling so the mounting system does not compromise building integrity, particularly on membrane roofs and parapet edges where uplift forces are highest.

Visualisation and Architect Coordination

Photorealistic renders for planning submissions and stakeholder presentations.
Shading analysis identifying obstructions and seasonal impact.
Revit-compatible BIM models for coordination with the architectural model.

Storage and Hybrid Layouts

Solar-plus-battery configurations modelled in the same SLD and inverter architecture.
Hybrid inverter layouts designed from the start, not added later.

Feasibility and Compliance

Preliminary feasibility reports covering roof suitability, generation potential, and budget estimates for early decision-making.
Design documentation citing MCS, IEC, and BS standards relevant to the electrical and structural engineering.

Why Hybrid First Matters

Adding battery storage after the electrical design is frozen typically forces a full redesign of the SLD, string architecture, and inverter selection. Hybrid inverters change how strings are grouped, how DC and AC coupling is arranged, and how the SLD is drawn.

How Commercial Solar Design Works: Four Steps from Project Brief to Handover

Commercial solar design follows four named stages: Project Brief and Data Review, Desktop Assessment, Detailed Engineering Design, and Design Sign-Off and Handover.

01 Project Brief and Data Review

Inputs: architectural drawings, existing electrical single lines, project requirements, and known constraints. Output: an agreed scope covering the design work required for planning, building control, and tender.

02 Desktop Assessment

Inputs: satellite imagery, weather data, and site location. Output: an initial feasibility report with estimated yields and costs. See some of the solar feasibility studies Bee Solar has previously delivered.

03 Detailed Engineering Design

Inputs: agreed feasibility findings, architectural drawings, and electrical constraints. Output: full electrical schematics, structural calculations, mounting plans, SLDs, string layouts, wind uplift modelling, and hybrid inverter and battery layouts.

04 Design Sign-Off and Handover

Inputs: your review comments and revision requests. Output: the complete design package handed over for tender or construction, including all revisions incorporated.

Stages 01 and 02 should happen before capital lock-in. Stage 03 needs architectural drawings and electrical SLDs to exist, so commission detailed engineering once those are available. At stage 03, MCS, IEC, and BS standards apply to the designs themselves, while DNO and G99/G100 remain grid-operator processes that the completed pack supports but does not control.

How Precision Design De-Risks Planning, Tender, and Yield

The purpose of this service is to de-risk projects through precision engineering and compliance-ready documentation, so the buyer avoids redesign costs, tender friction, and yield underperformance. For a deeper dive into the financial benefits, you can review the latest figures on commercial solar savings and ROI.

Early risk identification: feasibility studies flag roof constraints, shading issues, and generation shortfalls before capital is committed, preventing costly changes later.
Planning-ready documentation: packs are prepared to meet local authority and DNO requirements, reducing avoidable rework.
Yield optimisation: designs maximise energy per square metre by minimising cable losses and shading impact. Optimised string layouts also reduce inverter oversizing and clipping losses.
Faster contractor start: complete tender packs let EPC contractors price accurately on the first pass, reducing tender friction and clarifying the scope before site work begins.

Common mistakes precision design prevents: PV designed without wind or structural validation; batteries added after the SLD is frozen; shading and cable losses ignored in the layout; and US 20% or 33% roof-area rules used as the UK design basis.

Project Fit, Limitations, and What Changes Scope

Bee Solar commercial design services suit commercial warehouses, factories, offices, mixed-use developments, and multi-building sites needing UK-compliant design packs, not residential permit work. This service has been applied successfully to previous warehouse solar projects. Additionally, the same design principles extend to other sectors, such as hospitality-scale solar design for hotels, or the critical infrastructure requirements of design packs for data centres.

Limitations are specific:

Desktop feasibility is not a substitute for a site or structural survey. Yields are modelled estimates, not guarantees.
Bee Solar does not auto-approve grid connections. DNO decisions remain with the grid operator.

Scope and complexity drivers that affect the depth of engineering required:

Roof type and structural uncertainty, especially membrane roofs, parapets, and unknown load capacity. Non-standard structures like solar carport canopies are a prime example of when bespoke structural engineering is necessary.
Multi-building layouts that require coordinated electrical and structural design across a site.
Battery storage and hybrid inverter integration, which changes stringing and SLD architecture.
BIM level of detail and architect coordination requirements.
Existing electrical constraints, such as available grid capacity or voltage architecture.
Building orientation and roof geometry that affect shading analysis and string grouping.

Structural and wind uncertainty plus hybrid layouts are the usual scope expanders, not the number of panels. The design fee is not the cost of a full commercial solar system.

To start, share your project brief for a feasibility assessment and quote.

Example Design Pack: Mixed-Use Development

Bee Solar delivered a complete solar design and feasibility package for Capital Developments Ltd, a mixed-use development in East London. The package included structural analysis, electrical schematics, BIM models, and planning submission documentation. This project is a perfect example of a full mixed-use design pack delivered for a real client.

Planning consent achieved on first submission.
20% renewable energy target exceeded with 22% on-site generation.

These outcomes reflect the quality of the documentation pack: structural analysis that satisfied the local authority, electrical schematics that met building control requirements, and BIM models that supported the planning presentation. First-submission planning in this case is evidence of documentation quality, not a universal speed guarantee for every project.

First-Submission Consent

Planning consent achieved on first submission through complete documentation.

22% On-Site Generation

20% renewable target exceeded with 22% on-site generation modelled and delivered.

Frequently Asked Questions

Common Questions About Solar Design Services for Developers

What are commercial solar design services?

Commercial solar design services produce planning- and construction-ready engineering packs for non-residential buildings. These packs contain electrical schematics, structural calculations, BIM models, and compliance documentation that developers, architects, and EPC contractors use for planning submissions, building control approval, and tender pricing.

What is included in a commercial PV design pack?

A complete pack includes single-line diagrams, string layouts, inverter sizing, cable calculations, earthing schemes, structural assessments, ballast calculations, wind uplift modelling, photorealistic renders, shading analysis, and Revit-compatible BIM models. Solar-plus-battery configurations and hybrid inverter layouts are modelled from the outset. Design documentation cites MCS, IEC, and BS standards.

How does the commercial solar design process work from brief to handover?

The process runs through four stages: Project Brief and Data Review, Desktop Assessment, Detailed Engineering Design, and Design Sign-Off and Handover. The first two stages produce an agreed scope and feasibility report. Stage three produces the full engineering pack including SLDs, structural calculations, and hybrid layouts. Stage four covers revisions and documentation handover for tender or construction.

Do you design solar-plus-battery and hybrid inverter layouts from the start?

Yes. Battery storage and hybrid inverter layouts are modelled as part of the standard design package, not as an add-on. This matters because adding batteries after the electrical design is frozen forces a redesign of the SLD and string architecture.

How do MCS, IEC, and BS standards apply to commercial solar design (versus installation)?

In the design phase, MCS, IEC, and BS standards guide the engineering of the schematics, structural calculations, and mounting plans. They are applied to the design documentation itself. Installation certification is a separate matter that applies to the contractor who builds the system, not the design provider.

Does this service include commercial solar installation or only engineering?

This service covers engineering and design only, ending at design sign-off and documentation handover. Installation is a separate Bee Solar service that can be commissioned after the design pack is complete.

Will this design speed up DNO or G99/G100 approval?

The design pack supports your G99 or G100 application by providing complete, requirement-matching documentation, which reduces avoidable rework. The DNO's processing time remains under the grid operator's control and is not guaranteed by the quality of the design pack.

How much does a commercial solar system cost versus a design package?

The design fee covers engineering, calculations, and documentation. The full system cost covers panels, mounting hardware, inverters, batteries, labour, and grid connection work. These are separate budgets. Design scope depends on roof type, structural uncertainty, storage complexity, BIM requirements, and existing electrical constraints.

Do the "20% rule" or "33% rule" apply to UK commercial solar design?

No. The 20% and 33% roof-area rules are US rules of thumb and are not the UK design basis. UK commercial solar design is driven by yield optimisation, structural and wind validation, MCS/IEC/BS compliance, and DNO requirements for the specific site.

When should a developer or architect commission desktop feasibility versus detailed engineering?

Commission desktop feasibility before capital is committed, when the project needs initial roof suitability and generation estimates. Commission detailed engineering when architectural drawings and electrical SLDs exist and the project needs a construction-ready pack for planning, building control, and tender.

Get Your Free Solar Quote

Share your project brief for a feasibility assessment and quote within 48 hours.