Answer: The best solar design software is the tool or combination that produces your required project deliverables with traceable inputs and acceptable review. Residential proposals, commercial rooftops, detailed yield studies and utility-scale CAD work require different capabilities. Compare the ten tools below by workflow, then test exports, modeling assumptions, licensing and responsible-review requirements before choosing.
Publisher and method: SurgePV publishes this comparison and sells one of the listed products. Descriptions below use current vendor documentation checked on 30 September 2026. They are vendor-reported capabilities, not a controlled test of speed, prediction error, ease of learning or customer outcomes. Listing order is not a performance ranking. Prices retain the vendor’s currency and billing basis; taxes, services and regional terms need confirmation.
Compare tools by the work you need to deliver
Start with the output the next person must use. A persuasive proposal, a reproducible energy study and an editable engineering drawing are different deliverables. A software label such as “all-in-one” does not establish that every required document, equipment model or external review is included.
| Tool | Documented workflow to investigate | Evaluation question |
|---|---|---|
| SurgePV | Roof modeling, layout, shading, yield, finances, electrical workflow, materials and proposals | Can the available implementation produce your required outputs from one reviewed design basis? |
| Aurora Solar | Solar design and sales proposals with plan-specific modeling, services and integrations | Which capabilities, imagery and services are included in the quoted plan? |
| PVsyst | Grid-connected and stand-alone PV simulation | Can the study reproduce your inputs, losses and required report basis? |
| HelioScope | Commercial solar-plus-storage design, simulation, financials and sales | Do the project configuration and customer deliverables fit your actual use case? |
| OpenSolar | Design and sales within a free core application | Does your workflow stay in the app or require separately charged external connections? |
| PV*SOL premium | 3D PV design, shading and simulation with consumption, storage and related loads | Do the Windows workflow, equipment models and current edition fit the project? |
| PVcase | Separate site-selection, AutoCAD design and yield products | Which products and CAD licenses does the assignment require? |
| RatedPower | Utility-scale PV/storage layout, electrical work, cost modeling and documents | Which deliverables need reconciliation with yield-report or civil CAD tools? |
| SolarEdge Designer | Design, stringing, simulation and proposals in the SolarEdge ecosystem | Does the exact equipment and regional configuration meet the vendor’s design rules? |
| SketchUp | 3D geometry, shadow and daylight analysis | Which solar energy or electrical calculations need another model or extension? |
What each tool contributes—and what to verify
SurgePV: evaluate a connected design-to-proposal workflow
SurgePV supports 3D roof modeling, array layout, shading analysis, energy-yield and financial modeling, electrical workflow support, bill-of-materials output and proposal generation. Explore the solar design workflow and proposal workflow using permitted project inputs.
Check the actual equipment selections, model assumptions, output formats and revision handling. A generated document does not replace approval by the responsible engineer, authority, utility, lender or insurer. Ask which steps and exports are available in the implementation being quoted; do not assume that every CAD, permitting or contractual requirement is covered.
Aurora Solar: check the plan and service boundary
Aurora’s pricing page describes design and sales capabilities. Basic and Premium list one user and 50 projects per month. Premium lists LiDAR-assisted modeling and battery modeling; Enterprise lists APIs, permissions and access to additional professional services. Confirm entitlements and service charges in the actual quote rather than interpreting access to services as every service being included.
PVsyst: evaluate the simulation deliverable
PVsyst’s shop describes PVsyst 8 for grid-connected and stand-alone PV simulation, with a Professional license and separate command-line product. Identify which product and report format the project needs.
A lender or independent engineer may specify software, inputs, uncertainty treatment or a study method. Obtain those requirements directly. A software name alone does not establish that a particular report is accepted, that its inputs are correct or that debt providers accept every probability result without review.
HelioScope: commercial design extends beyond a yield-only description
HelioScope currently describes commercial rooftop, carport and ground-mount solar with storage, simulation and financials. Its positioning includes sales as well as design. Evaluate that current workflow instead of assuming it has no financial or customer-sales capability.
Ask for the applicable plan, equipment and project-size limits, report formats and required services. Vendor accuracy and speed statements need their underlying method and relevant project context; this comparison does not adopt a universal error percentage or completion time.
OpenSolar: distinguish free core work from paid connectivity
OpenSolar’s February2026 announcement states that the core application remains free, with charges for API Access and supported connectors beginning on 16 April2026. External connectivity is a different cost boundary from working inside the core app.
Check the workflow you actually need, including integrations and data-export arrangements. Free licensing does not establish inferior simulation, a smaller database or a need to upgrade to a fictional paid design tier. Neither does it remove the need to validate inputs and required outputs.
PV*SOL premium: 3D planning and simulation on Windows
Valentin Software describes 3D PV planning, shading, yield and scenarios involving consumption, storage, electric vehicles and thermal loads. Its listed system requirements include Windows10 or11,64bit. The product page currently distinguishes supported3D module counts for mounted and roof-parallel arrangements; confirm the relevant configuration and version for a large project.
Check current equipment, climate and load data, economic inputs and export formats. A country-specific feature or database does not certify compliance with every current local requirement.
PVcase: identify the product rather than treating the portfolio as one cloud app
The PVcase product portfolio separates Prospect, Ground Mount, Roof Mount and Yield. Ground Mount and Roof Mount are described as AutoCAD-driven products; Roof Mount addresses commercial and industrial rooftops. The earlier description of PVcase as exclusively cloud-based ground-mount software would miss this distinction.
Confirm the product combination, compatible CAD environment, license cost and handoff formats. A portfolio capability is not automatically included in a single product or subscription.
RatedPower: utility-scale design with a clear downstream boundary
RatedPower’s platform page describes utility-scale PV and storage layout, electrical design, CAPEX, materials and document generation. It also describes DWG exchange and explicitly says the platform is not a replacement for a yield-report tool or civil CAD environment.
That boundary matters when evaluating consolidation. Test the actual site geometry, editable documents, exports and reconciliation process. Vendor examples and testimonials are not evidence that your project will achieve the same speed or outcome.
SolarEdge Designer: distinguish equipment rules from project approval
SolarEdge describes Designer as free within its ecosystem, with modeling, shading, automatic stringing, DC cabling, simulation and customer proposals. Its design-compliance statement concerns SolarEdge design rules.
Confirm the supported component combinations and regional documentation. Compliance with vendor configuration rules does not establish compliance with all applicable electrical, structural, permitting or utility requirements. A forecast is not measured generation or a guaranteed customer saving.
SketchUp: geometry and sunlight studies have a different output boundary
SketchUp’s current analysis documentation describes Advanced Shadows and additional Public Labs analysis types. These address sunlight, shadows and daylight rather than establishing a complete PV electrical or annual-energy study.
Evaluate the exact desktop or web product and any required extensions. A useful3D or shadow view can support a design conversation, but it should not be relabeled as verified AC generation, an electrical design or an approved installation drawing.
Dated pricing examples
These are published examples checked on 30 September2026, not equivalent offers or a total-cost ranking. Keep currencies separate unless an exchange-rate date and conversion method are stated.
| Product or plan | Published billing example | Cost boundary to preserve |
|---|---|---|
| SurgePV Individual | USD1,899 per user per year | One seat; confirm current written quote |
| SurgePV three-seat team | USD1,499 per user per year; USD4,497 total | Three seats, not USD1,499 for the team |
| SurgePV five-seat team | USD1,299 per user per year; USD6,495 total | Five seats, not the individual price |
| Aurora Basic | USD159/user/month monthly; USD1,620/user/year annually | Annual equivalent is USD135/month; listed project limit and services still matter |
| Aurora Premium | USD259/user/month monthly; USD2,640/user/year annually | Annual equivalent is USD220/month; confirm extras |
| PVsyst8 Professional | CHF700/year | Product and license basis differ from proposal platforms |
| PV*SOL premium | EUR845 for a one-year named-user license, plus VAT | Confirm region and renewal terms |
| OpenSolar core | No core application subscription charge per announcement | API Access and supported connectors have separate charges |
| SolarEdge Designer | No license or subscription fees per product page | Ecosystem and exact equipment suitability still matter |
| HelioScope, PVcase, RatedPower, SketchUp | Verify the relevant current plan with each vendor | No unverified price or trial promise is assigned here |
SurgePV pricing comes from its published pricing page; the external prices come from the vendor pages linked above. Do not add CHF, EUR and USD amounts together as though they were one annual total.
Use a project acceptance test before choosing a stack
Prepare one representative, permitted project and a deliverable list. Include the difficult conditions your real pipeline contains: uncertain geometry, several equipment options, storage, tariff inputs, a CAD handoff or a strict review package. State which inputs are measured, supplied, modeled or still unknown.
- Define the deliverables. Name the customer proposal, reproducible energy record, material output, electrical document and editable export that the receiving roles need.
- Set a common basis. Use the same source geometry, equipment, weather, losses and financial assumptions where appropriate. Document intentional differences.
- Inspect the output. Check units, model settings, missing inputs, warnings and revision identifiers. Two similar annual totals do not validate each other.
- Review the handoff. Ask the intended recipient to open the export, reproduce the relevant calculation and identify conditions requiring further approval.
- Measure the work. Record preparation, correction, review and data-transfer time separately. Include errors and failed exports rather than counting only a successful demonstration.
- Compare the cost boundary. Include seats, projects, services, integrations, CAD, training and retained specialist tools. Separate labor capacity from cash savings.
- Record the decision. Choose, reject or request evidence against each requirement. State which tool remains responsible for each output and what would reopen the decision.
For example, two hours of measured transfer work per week across52working weeks equals104hours of labor capacity. That hypothetical arithmetic does not show104hours of cash savings, identify the work a new tool would eliminate or prove a payback period. Use your own observed weeks and redeployment assumptions.
The software selection checklist provides a more detailed procurement record. The broader software roundup also covers preliminary yield calculators. Here, the focus is the licensed workflow and downstream deliverable you need to accept.
Related comparisons
Use the Aurora Solar comparison, PVsyst comparison, HelioScope comparison or OpenSolar comparison when a two-product question needs closer examination. Confirm dates, publisher relationships and sources before relying on changing capabilities or prices.
Frequently Asked Questions
What is the best solar design software for residential installers?
Shortlist tools against the actual roof, equipment, proposal and financial workflow. Check the available plan, imagery coverage, export requirements and customer-facing assumptions. A demonstration using permitted project data is more useful than a universal winner based on a feature count.
What is the best solar design software for commercial and industrial projects?
Compare the deliverables your team must produce: roof or ground layout, shading and yield, equipment configuration, financial scenarios, customer proposals and CAD handoffs. HelioScope describes commercial solar-plus-storage workflows; other tools cover different parts of that work. Verify limits and required approvals for your project.
What is the best free solar design software?
OpenSolar states that its core app remains free; API Access and supported external connectors are separately chargeable. SolarEdge describes Designer as free within its software ecosystem. Evaluate the supported equipment, data movement, project requirements and review process rather than assuming free software has inadequate simulation.
Can SurgePV replace multiple solar design tools?
It may cover several steps in a team’s workflow, but replacement must be tested against required inputs, calculations, exports and reviewer acceptance. SurgePV supports design, modeling, electrical workflow, materials and proposals. Confirm implementation scope and retain other tools where contractual or technical deliverables require them.
What is the most accurate solar design software?
This comparison does not establish an accuracy winner. Agreement between two models is not proof that either predicts actual energy accurately. Compare input assumptions and loss treatment, investigate differences, and use relevant measured evidence and qualified review where the decision requires validation.
How much does solar design software cost per year?
Compare the same currency, billing term, seat count, plan and included services. SurgePV’s three-seat annual plan is USD4,497 in total, not USD1,499 for the team. Other tools use different currencies and license models. Dated examples below require confirmation before purchase.
Which solar design software includes proposal generation?
SurgePV, Aurora Solar, OpenSolar and SolarEdge describe customer proposal workflows. HelioScope also describes commercial design, financials and sales. Check the actual plan, permitted output formats, assumptions and review state; a customer proposal is a different deliverable from an approved engineering or construction package.
Evaluate the outputs your team needs
Bring permitted inputs and a deliverable checklist to a guided SurgePV demonstration. Confirm implementation scope, product access, pricing and contract terms in writing.
Request a guided demo