Top 10 Best Solar Power Design Software of 2026

HOMER Pro is built around energy-system modeling rather than only PV-only geometry, so module layout and roof-level detailing are not its primary strength. The tool runs a full simulation across time steps to evaluate dispatch, autonomy, and reliability targets that depend on load profiles and resource variability. It includes loss handling in the system model and can generate sensitivity studies for design variables like PV capacity, storage size, and dispatch strategy. Results include summary metrics for energy production, fuel use, and lifecycle costs, which supports decision-making during feasibility studies.

A key tradeoff is that HOMER Pro does not replace dedicated PV layout and permitting workflow tools that generate detailed plans and single-line diagrams from CAD-ready geometry. HOMER Pro fits best when the goal is system-level sizing and operational feasibility, such as comparing storage strategies or generator backup configurations. For a PV design process that already has rooftop models, string sizing, and inverter matching handled elsewhere, HOMER Pro can serve as the performance and economics layer.

OpenSolar is geared toward system design through a guided modeling flow that covers module layout, stringing logic, and energy yield simulation inputs. It supports artifact export for collaboration, including diagram-style outputs and plan-set oriented deliverables used in permitting workflows. The automation angle is stronger when teams reuse prior project configurations and keep component and loss assumptions consistent across iterations.

A key tradeoff is governance and setup discipline. Teams that frequently change standards, inverter lineups, or modeling assumptions can spend time aligning configurations before designs stay comparable. OpenSolar fits best when the design process must produce repeatable handoff packages for EPC review cycles.

Aurora Solar is distinct in how tightly its layout, shading, and electrical modeling stay coupled inside a single worksheet-driven workflow. It supports Helios3D terrain import for realistic site context, then uses that terrain context during design iterations. It also provides DWG export for downstream drafting teams that already operate in AutoCAD-based processes. Delivery artifacts fit best when teams want the model to stay the source of truth from early concept through plan set preparation.

A key tradeoff is that CAD output control is narrower than what highly customized AutoCAD-centric workflows provide for layer-by-layer standards and bespoke annotation. Aurora Solar works well when a team needs rapid scenario iteration for proposal work and then hands the same model to drafting for interconnection diagram and drawing package creation. The workflow is strongest when design assumptions and output formats are standardized across the organization.

Pylon is a solar power design workflow tool that connects roof and site geometry to PV layout, electrical design outputs, and drawing exports. Its distinct angle is automation across the handoff chain, including generating consistent diagrams and plan-set deliverables from the same project model.

Pylon supports common solar engineering steps such as module placement, stringing and inverter matching, and energy yield simulation with loss modeling. It also focuses on integration and extensibility so design outputs can be reused in downstream permitting and EPC processes.

Solargis Evaluate supports solar PV design workflows with geographic modeling, energy yield simulation, and layout-driven electrical outputs. It centers on irradiance and meteorological inputs tied to site conditions, then maps those inputs into downstream modeling used for design documentation. The tool also supports common deliverables such as GIS-based site preparation and CAD-oriented exports for handoff into permitting and engineering processes.

SolarEdge Designer targets solar PV system design workflows that need tight coupling to SolarEdge hardware planning and documentation. It supports module layout creation, string sizing inputs, energy yield simulation inputs, and multi-sheet plan-set style outputs used in EPC and installer handoffs.

The tool also provides export options such as DWG output and uses workflow patterns that align with permitting and customer-facing documentation tasks. For teams that must coordinate electrical design decisions with roof geometry inputs and inverter-level configuration, SolarEdge Designer fits system-design standardization more than cross-vendor tinkering.

Enphase Solargraf centers PV system design workflows around Enphase hardware planning, from module placement through Enphase-specific configuration. The tool generates design outputs tied to a permit-ready documentation path, including plan set deliverables and construction-ready drawing exports.

Solargraf also supports engineering steps like string sizing and inverter matching with Enphase component constraints reflected in the model. Grid-fit iterations are managed through guided configuration rather than free-form CAD-style edits.

SolarNexus is a solar power design software focused on turning engineering inputs into permit-ready deliverables for distributed PV projects. Core capabilities center on PV system layout, energy yield simulation, and documentation outputs tied to common plan-set workflows.

Design work emphasizes constraint handling around roof and electrical layouts, with exports intended to support handoff to plan production and downstream modeling. The product positioning targets teams that need repeatable design runs rather than one-off modeling exercises.

SolarEdge Designer produces PV system designs with module and string-level layout tied to SolarEdge inverter and optimizer configurations. The workflow focuses on roof layout modeling, automatic placement logic, and report outputs that support handoff packages for permitting and construction teams.

It also integrates with Helios3D terrain workflows for higher fidelity surroundings, and it can export CAD data for downstream drafting. SolarEdge Designer is distinct in how tightly it maps design decisions to SolarEdge-specific electrical assumptions and documentation outputs.

Arka 360 targets solar PV system design workflows with a modeling pipeline built around geometry, electrical layout, and documentation outputs. It supports single-line and plan set style deliverables by connecting roof and array layout inputs to sizing and loss-aware energy calculations.

Arka 360 also focuses on export-oriented handoff, including CAD-oriented outputs and industry exchange formats used in permitting and EPC reviews. Integration depth shows up mainly through file-to-file workflows and interoperability with common design tool ecosystems.