Best Solar Design Software 2026: Tools, Pricing and Workflow Fit

Answer: The best solar design software depends on the deliverable: an installer’s layout and proposal, a reviewed electrical package, or a detailed energy assessment. Shortlist tools by project type, inspect their assumptions and exports, and compare the full cost at your team’s volume. The tools below have different scopes; this guide does not establish a universal winner or independently measured accuracy ranking.

How This Comparison Was Prepared

SurgePV publishes this guide and sells one of the products included. Product descriptions and prices below come from linked official pages checked on September 30, 2026. They are vendor-reported information, not results from an independent head-to-head trial. We have not established comparative accuracy scores, customer time savings or a ranked winner.

The shortlist preserves the design, modeling and geometry tools covered by this guide, including PVWatts. They are grouped for evaluation; listing order is not a performance ranking. Public documentation establishes what to investigate, while a pilot establishes whether the workflow meets your requirements. Unverified prices and capabilities remain questions for the vendor.

For the broader category, explore our solar design software directory. For a requirements-led evaluation, use the software selection tests.

Best Solar Design Software: Comparison Table

The last three can address specific information needs. Their inclusion does not mean a resource estimator or shadow view replaces a full design, sales and engineering workflow. Conversely, a combined platform still needs evidence for the particular outputs you will rely on.

Published Prices: Compare Units Before Totals

The figures below were displayed on the cited pages on the check date. Keep currencies separate, confirm applicable taxes and obtain written terms for your actual plan. A normalized monthly amount does not change an annual billing commitment.

Sources: SurgePV pricing, Aurora pricing, PVsyst shop, OpenSolar’s connection-pricing notice, PVGIS and PVWatts V8 documentation.

SurgePV’s published USD 1,299 rate belongs to the five-user plan; it is not the one-person annual price. Its pricing page displays GST, so confirm tax treatment in the written quote. Aurora’s Basic and Premium pages list fifty projects per month and one user in each displayed plan; verify additional users, projects and extras for your team. This is not a claim that all vendor features are included at the listed base price.

Tool Profiles and Evaluation Questions

SurgePV

SurgePV’s design workflow covers roof modeling and layout, with related shading, generation and financial analysis and proposal workflows. Its product scope also includes electrical design support and BOM generation. Evaluate these against your required inputs, deliverables and review process.

Bring one permitted project and ask to inspect a geometry change, an equipment revision, production assumptions and the resulting customer document. Confirm required exports, integration fields and equipment configurations in the demonstrated version. Access is offered through a guided demo; this guide does not promise a self-service trial.

Software support does not replace the responsible engineer, authority, utility or lender. An attractive output or automated check is not proof of project approval.

Aurora Solar

Aurora’s published plans combine design and sales features. Its Premium plan lists LiDAR and battery modeling, while Enterprise has separately described capabilities and custom pricing. See the official plan table for the scope rather than assuming a feature is included in every subscription.

Ask to demonstrate the address, imagery coverage, proposal requirements and exact CRM or API handoff your team needs. Confirm usage and service charges before extending a one-user price across a team. Vendor use of “bankable” language does not establish acceptance by the reviewing party on your project.

PVsyst

The PVsyst shop describes version 8 as simulation software for grid-connected and stand-alone PV systems, with a Professional license distinct from educational and other licenses. Do not confuse discounted, watermarked or pumping-specific products with that professional offer.

Use a representative simulation to inspect inputs, loss assumptions and reporting. Determine how its outputs will enter any separate layout or customer-proposal workflow. Confirm required methods and review responsibilities with the report recipient; using a recognized modeling product does not itself issue a financing certificate or independent assessment.

HelioScope

HelioScope’s official site presents commercial solar and storage design and sales, including rooftops, carports and ground mounts. The site identifies Aurora ownership. Describing it as a rooftop-only tool with merely basic proposals would not reflect that published scope.

Request a current offer for your configuration and test the layout, storage assumptions, production and commercial outputs you need. The homepage’s lender-acceptance and validation statements are vendor claims; this guide has not independently verified every project type, model setting or recipient’s acceptance requirements.

OpenSolar

OpenSolar presents an integrated design, sales and management workflow. Its February 2026 notice distinguishes the free core app from charged API Access and supported connectors, with charges beginning April 16, 2026. That is different from an invented restricted free tier that forces an upgrade to a paid core subscription.

Test the actual equipment, local financial setup, customer document and handoff. If your team connects an external CRM or accounting system, verify connection pricing and terms separately. A free core app is neither evidence of inferior simulation accuracy nor assurance that every external service is free.

Solargraf

Solargraf’s manual-stringing documentation, published March 5, 2026, describes string-inverter placement, panel-string connection and electrical compatibility checks in the guided design experience. Microinverters use a different association workflow. This contradicts a blanket claim that it cannot support string-inverter work.

Confirm the relevant experience is enabled, inspect the actual equipment library and test warning behavior for your configuration. Ask which proposal, permitting and export functions your plan and location support. Compatibility checks in software should be reviewed against current equipment instructions and applicable project requirements.

PVGIS

The European Commission’s PVGIS page provides free solar-resource and PV-performance information for worldwide locations except the poles. It is not limited to EU projects. The page distinguishes existing services from newer public beta tools.

Record the tool version, location, selected resource dataset and configuration used for an estimate. Treat a resource or production result as one input to a design workflow, with its assumptions retained for comparison. Do not silently compare different datasets or infer electrical approval from an energy estimate.

PVWatts

PVWatts V8 estimates PV electricity production using specified system, location and loss inputs. Its documentation distinguishes annual and monthly energy outputs from hourly output variables and units.

Use it for a clearly scoped production estimate or comparison case. Record the model inputs and weather basis before interpreting a difference from another tool. Capacity alone cannot specify annual generation, and a simple estimate does not establish surveyed roof geometry, final string design or a permitting package.

SketchUp

SketchUp’s August 2026 analysis documentation describes Advanced Shadows, with selected solstice or equinox analysis. It also identifies other analysis types as Public Labs features in development. The documentation does not support a claim that its analysis ecosystem has had no updates.

Geometry and visual shadow analysis can help investigate obstructions. A daylight or shadow result is not automatically annual PV energy or electrical mismatch loss. Identify the analysis type, available subscription features and any separate extension or PV-model handoff needed for your deliverable.

What to Look For in Solar Design Software

Start with six capability checks. Each should produce evidence you can inspect; a feature label alone is not a pass.

1. Geometry and Shade Analysis

Inspect the input imagery or survey, dimensions, tilt, azimuth and obstructions. Record unresolved measurements. Test a known obstruction and ask what the reported loss represents. An instantaneous shadow, an annual irradiance loss and an electrical production loss are related but different quantities.

Request the near-shading and horizon methods, treatment of electrical mismatch, time basis and output limitations. A tool need not have every possible model to fit every job; it must support the calculation you are relying on, with a controlled specialist handoff where necessary.

2. String Design and Inverter Checks

Identify who selects equipment and reviews the electrical design. Demonstrate the exact module and inverter configuration, including relevant voltage, current and temperature assumptions. Ask which checks are implemented and which remain the designer’s responsibility.

A valid-looking string or absence of a software warning does not establish that conductor sizing, protection, installation requirements and connection approval have all been addressed. Retain the equipment-data version and named review step with the output.

3. Inspectable Energy Modeling

Ask to see the resource data, geometry, equipment, losses, temperature treatment and energy boundary. Explain whether the result is an annual estimate, a time series or an uncertainty assessment. More output rows do not, by themselves, prove greater accuracy.

For a project requiring P50 or P90, obtain the recipient’s required period, uncertainty method and review scope. A single modeled annual figure is not automatically a probability assessment or guaranteed minimum production. Keep report acceptance requirements separate from a product’s marketing description.

4. Proposal Revisions and Financial Assumptions

Change module count, production or a tariff assumption and inspect the customer document. The layout, equipment schedule, expected energy and price should identify the same approved revision. Record exclusions, unverified incentives and conditions rather than letting attractive formatting conceal uncertainty.

Model bills using the relevant consumption, tariff and export treatment. Generation is not necessarily self-consumed energy, and a generated kilowatt-hour is not necessarily worth the retail import rate. Ask who checks the financial assumptions before the proposal is released.

5. BOM and Usable Exports

Inspect sample outputs in the receiving workflow. Match equipment models and quantities to the current layout and electrical design. Clarify which quantities are generated, estimated or supplied by a reviewer; route-dependent cable lengths and structural details should not be presumed complete.

Test the required PDF, spreadsheet, drawing or machine-readable output rather than insisting every project needs the same formats. Record manual transformation and review effort. A file that opens correctly can still lack information the recipient requires.

6. Integrations, Ownership and Access

List the records and fields that must pass between systems. Test changes, duplicate records, failed transfers, permissions and an export at contract termination. A named connector does not establish that all needed fields synchronize.

For multiple offices or markets, test each required workflow. Separate language and currency support from current legal, incentive and connection requirements. Name the local reviewer and any continuing manual work.

Match the Shortlist to Your Business

Do not reject a tool solely because it is free, desktop-based or lacks a self-service trial. Do not choose a combined platform solely because it reduces the number of applications. Determine whether the outputs and handoffs satisfy the work your team is responsible for.

Use the software checklist to record requirements and unresolved items. For commercial procurement, the commercial buyer guide adds project-specific deliverable and review considerations.

ROI: Measure Time and Total Cost Without Inventing Results

Price the same operating volume and seat count in each candidate. Include setup, training, usage, imagery, connections and required specialist review. Keep labor capacity separate from subscription charges and cash savings.

For a hypothetical comparison, suppose twenty monthly projects each take three hours in Workflow A and two hours in Workflow B, at a modeled labor value of USD 75 per hour. A costs USD 100 monthly in software; B costs USD 300. Then:

The modeled difference is USD 1,300 monthly, with twenty hours of capacity released under those assumptions. It is not a measured result for SurgePV or another named tool, a guarantee of extra sales or an automatic payroll reduction. Add any onboarding and specialist-review differences before using it for a purchase decision.

In a pilot, record time spent collecting data, operating the tool, correcting outputs, reviewing work and preparing the final handoff. Compare the same scope and quality standard. A quicker draft is not a faster completed project if unresolved inputs or rework merely move downstream.

Keep a blank decision record: candidate, tested project, required deliverable, evidence, reviewer, unresolved issue, workaround cost and decision. Mark untested requirements as untested. Essential failures should be resolved before interface or price preferences determine the outcome.

To include SurgePV in that evaluation, request a demonstration with permitted inputs and agree which requirements can be shown. Follow the same acceptance tests used for the rest of the shortlist.

Frequently Asked Questions

What is the best solar design software in 2026?

There is no universal winner established by this guide. Match the tool to your required geometry, energy modeling, electrical deliverables, proposal workflow and review process. Use the shortlist to request evidence, then test the same representative project and revision in each candidate.

What features should I look for in solar design software?

Start with required outputs and their reviewers. Check site geometry, shading method, equipment data, production assumptions, electrical scope, proposal revisions and usable exports. Add integrations and access controls where the workflow needs them. A specialist tool plus a controlled handoff can be appropriate.

How much does solar design software cost?

Compare current written terms for the same seats, projects and deliverables. Identify annual versus monthly billing, currency, taxes, usage charges, imagery, integrations and onboarding. The dated price table separates per-user prices from minimum team totals; it does not normalize unlike plans or currencies.

Can solar design software generate client proposals?

Some platforms combine design and customer proposals; others specialize in modeling or geometry. Test a change to equipment, production or pricing and inspect the revised proposal. Integration alone does not prove that every value remains synchronized or that a customer document is suitable for engineering approval.

What is the difference between PVsyst, Aurora Solar, and SurgePV?

They are candidates for different workflow requirements, rather than interchangeable certificates of project quality. This guide separates documented vendor scope from editorial evaluation questions. Compare the outputs your project actually needs, including any specialist model, sales document or external review.

Does solar design software work for commercial and utility-scale projects?

Evaluate the actual project size, layout, equipment, modeling scope and required deliverables. Commercial and utility-scale projects may need specialist engineering and independent review. A software-generated report is not automatic lender acceptance, a stamped electrical design or permission to connect.

What solar design software is best for markets outside the US?

Test the actual location, equipment, weather data, tariffs, language, currency and export requirements. Ask vendors to identify supported features and remaining manual work for that jurisdiction. A global coverage label does not establish local incentive eligibility, code compliance or utility acceptance.

How do I evaluate shade analysis quality in solar software?

Inspect the geometry and obstruction evidence, calculation method and reported quantity. A shadow image, shaded-area fraction, irradiance loss and electrical energy loss are different outputs. Test a known obstruction and ask how near shading, horizon effects and electrical mismatch are treated, with limitations recorded.