Top 10 Best Solar Design Services of 2026

Ramboll supports solar site assessment and subsequent photovoltaic system design with engineering depth across energy yield modeling, layout decisions, and electrical design deliverables. The service is commonly used by developer and EPC groups that need coordinated site, structural, and electrical outputs rather than isolated discipline drawings. For distributed generation, design packages can support rooftop and ground-mounted layouts where shading and solar access materially affect array placement decisions.

A practical tradeoff is that governance and review cycles across multiple engineering disciplines can slow iteration when design intent must change frequently late in the process. Ramboll fits best when the project scope is defined enough to support consistent configuration through design review, such as early layout confirmation feeding downstream electrical single-line diagram work. Usage situations include interconnection-driven constraints where inverter selection, string sizing, and DC-to-AC ratio choices must remain consistent across submissions.

DNV fits teams that need design review discipline alongside production artifacts, especially where interconnection constraints and grid study inputs shape the photovoltaic system design. The strongest fit appears in projects requiring clear traceability from assumptions to single-line diagram content and permit set readiness. The service also aligns with organizations that need wind and snow loads and structural load analysis inputs handled with engineering documentation rather than generic templates.

A key tradeoff is that DNV-style governance and documentation can add coordination steps versus faster design-only workflows. DNV works well when an EPC, developer, or owner wants a controlled design basis before committing to construction-ready drawings or electrical site plan finalization. It is less efficient for teams that only need rapid preliminary layout and production simulation without formal review gates.

Kimley-Horn’s solar service work is structured like a full engineering delivery, including preliminary layout decisions that feed into later array planning and electrical design. The team focuses on production-quality deliverables such as construction-ready drawings and engineering documentation suitable for interconnection application processes. Multidisciplinary coordination is a practical strength for projects where structural load design and electrical routing choices must be consistent across the drawing set.

A tradeoff is that teams seeking highly standardized, product-like automation and tight API-driven configuration may find fewer integration points than purpose-built software vendors. Kimley-Horn is a better match when an engineering-led design workflow is needed to resolve shading constraints, array placement, and electrical architecture together for a single project team. It fits situations where the project needs coordinated engineering signoffs and drawing packages rather than just model exports.

Burns & McDonnell provides solar design services that connect civil, structural, electrical, and interconnection scopes into one delivery workflow. Engineering teams use its project controls discipline to manage drawing sets through permitting milestones and construction package handoff.

Work commonly centers on photovoltaic system design, including structural load review for mounting systems and electrical design artifacts such as single-line diagram and electrical site plan deliverables. For distributed generation and utility-scale solar, the value shows up in cross-discipline coordination rather than in a client-facing design automation console.

Tetra Tech delivers solar design and engineering services that cover site assessment through construction-ready deliverables for both distributed generation and utility-scale projects. The firm applies engineering disciplines beyond layout work, including structural load design, geotechnical coordination, and grid interconnection study support for electrical scope.

Deliverables typically include engineering drawings and analysis outputs used for permitting and engineering review workflows. Large project teams get consistent cross-discipline integration across civil, structural, electrical, and permitting coordination needs.

GHD delivers solar design services for distributed generation and utility-scale work, combining engineering delivery with project execution experience across civil, electrical, and structural scopes. The offering centers on construction-ready deliverables like electrical site plans and single-line diagrams, plus energy yield assessment and layout development with shading-aware assumptions.

GHD’s differentiation shows up when design inputs must align with engineering analyses for structural load paths, permitting scope, and grid interconnection requirements across EPC and developer workflows. The service model supports coordination across disciplines rather than limiting scope to rooftop layout or electrical only packages.

Jacobs delivers solar engineering design services that pair grid and electrical engineering with site and energy modeling inputs in a single delivery workflow. The company’s work scope commonly spans preliminary layout through construction-ready drawing packages for both distributed generation and larger projects.

Jacobs also aligns design outputs with utility interconnection study artifacts and electrical compliance expectations to reduce rework loops during permitting and execution. Its differentiator in the market is the breadth of engineering disciplines under one accountable service chain, not just PV sizing or layout drawings.

Stantec delivers solar design services through an engineering-led delivery model that typically pairs photovoltaic engineering with site and balance-of-plant scope for project teams. Core work commonly includes photovoltaic system design and construction-ready permitting deliverables, plus electrical design coordination such as single-line diagrams and electrical site plans.

The distinct value for solar developers and EPC teams comes from how Stantec organizes engineering into reviewable packages for multidisciplinary scope control across civil, structural, electrical, and permitting interfaces. Delivery quality tends to reflect a large-firm workflow with defined documentation outputs rather than a narrow design-only specialty.

Black & Veatch delivers solar design services that span project engineering, grid interconnection coordination, and construction-ready document production. Its work typically covers photovoltaic and solar thermal scope through engineering teams that align technical design outputs with permitting and build constraints.

For larger distributed generation and utility-scale programs, it emphasizes electrical design integration, site and structural engineering inputs, and interconnection package readiness. Teams evaluating it should focus on delivery governance and engineering traceability rather than expecting a single configuration-driven solar design tool.

WSP delivers solar design services through engineering-led delivery that combines site investigation, electrical design, and permitting support for distributed generation and utility-scale projects. Teams typically receive construction-ready outputs such as electrical site plans and single-line diagrams along with energy yield and shading work that feeds layout and equipment sizing decisions.

WSP’s differentiator is the depth of multidisciplinary coordination across structural, environmental, and grid-interconnection workflows that solar EPC teams must synchronize. This fit is strongest when the project needs engineering judgment across multiple disciplines rather than just drafting and layout automation.