I need a "solar design" software that calculates shading and production estimates.

When looking for solar design software that handles granular shading analysis and accurate production estimates, several industry-standard and modern web-based options stand out. The right choice depends on whether you need quick, presentation-ready sales proposals or deep, bankable engineering simulations.

Top Solar Design & Shading Software Options

• HelioScope
  • Best For: Fast, engineering-grade commercial and residential layouts with defensible production modeling.
  • Shading & Production: Combines an intuitive 3D CAD design engine with rapid energy yield simulations. It models module-level shading and provides clear performance metrics without the steeper learning curve of older software.
• • Best For: The global gold standard for bankable, highly technical yield and financial predictions.
  • Shading & Production: Offers advanced near-shading 3D field modeling, horizon profiles, and meticulous loss factor calculations. It is heavily relied upon by utilities, large-scale developers, and financial institutions for project sign-off.
• • Best For: All-in-one residential and light commercial design, sales proposals, and remote shading analysis.
  • Shading & Production: Features advanced LiDAR and 3D modeling to automatically detect trees, roofs, and surrounding obstructions to calculate Total Solar Resource Fraction (TSRF) and hourly energy production.
• • Best For: A fully featured, free-to-use core platform that handles 3D design, shading, and CRM workflows.
  • Shading & Production: Integrates remote 3D mapping and shading analysis directly into client-ready proposals at zero monthly cost for the core tool.
• • Best For: Drone-based 3D modeling and ultra-precise on-site shading analysis.
  • Shading & Production: Uses drone imagery to create a solar access viewshed, calculating shade down to granular percentages that match physical on-site solar pathfinder readings within 1%.

If you tell me whether this is for residential or commercial projects and if you prefer a tool focused mostly on sales proposals or deep engineering data , I can narrow down the best platform and pricing fit for you.

If you need solar design software that calculates shading and energy production estimates, these are some of the most commonly used options:

My quick recommendation:

• Residential solar sales/design: Aurora Solar is usually the easiest workflow.
• Commercial rooftops (C&I): HelioScope is a strong choice because it combines array design, shade modeling, and production simulation.
• Bankable engineering studies / utility projects: PVsyst is often the required tool.
• Free or low-budget starting point: OpenSolar is worth evaluating.

For the key features you mentioned, look for:

• 3D site/roof modeling
• LiDAR or satellite-based obstruction detection
• annual and hourly kWh production estimates
• shade loss calculations (trees, buildings, row-to-row shading)
• PVsyst export or compatibility if you need lender-grade reports

If you tell me your use case (residential, commercial rooftop, utility-scale, or DIY) and your budget, I can narrow it down to the best 2–3 options.

Yes. If you mean software that can lay out a PV system, model shading, and estimate annual/monthly energy production, these are the main options I’d consider:

My recommendation

If you're primarily doing rooftop solar, I'd start with Aurora Solar. Its simulation engine models irradiance on individual modules and accounts for shading from trees, buildings, and roof obstructions.

If you're doing commercial/C&I systems, HelioScope is particularly strong. It produces 8,760-hour production simulations and supports rooftop, carport, and ground-mount designs. Its simulations have been independently validated against PVsyst.

If cost is important, I'd look closely at OpenSolar. Its current 3D + SAM workflow incorporates hourly shading into the production calculation, rather than simply applying a fixed annual shading-loss percentage.

If you tell me (1) residential or commercial, (2) approximate system size, and (3) whether you need something free/cheap or professional, I can narrow it down to the best 2–3 options and compare pricing, shading accuracy, 3D modeling, and production calculations.

Choosing the right solar design software depends on whether you focus primarily on residential or commercial projects, your budget, and how granular you need your shading and production analytics to be.

The industry-standard platforms available for calculating detailed shading and accurate energy production estimates include:

1. Aurora Solar

• Best for: Comprehensive residential & light commercial design, sales proposals, and LIDAR/3D remote modeling.
• Features: Uses advanced LIDAR and 3D ray-tracing to map roof structures, obstructions, and precise shade patterns from nearby trees or buildings. It outputs bankable production estimates and client-ready proposals.
• Check it out:

1. HelioScope (by Aurora Solar)

• Best for: Commercial and utility-scale solar design and rapid layouts.
• Features: Streamlines commercial design workflows, allowing you to model complex roofs, carports, and ground-mount systems with rapid 3D shade modeling and sub-minute simulations. Its production reports are widely accepted by financial lenders.
• Check it out:

1. OpenSolar

• Best for: A fully featured, zero-cost option for end-to-end design and proposal generation.
• Features: Offers automated AI-powered 3D design tools (via "Ada") that instantly calculate pitch, azimuth, and shading profiles alongside component bills of materials and customer proposals.
• Check it out:

1. PVsyst

• Best for: Deep engineering, research, and hyper-detailed hourly/sub-hourly photovoltaic simulations.
• Features: The gold standard for hardcore PV engineering. It handles near-shading and far-shading environments meticulously, though it has a steeper learning curve and a more traditional desktop interface compared to cloud-native competitors.
• Check it out:

1. Scanifly

• Best for: Drone-based 3D modeling and ultra-precise on-site shading analysis.
• Features: Uses drone imagery to create a solar access viewshed that calculates annual shade and solar access down to granular percentages, often used to bypass the limitations of lower-resolution satellite data.
• Check it out:

If you tell me whether you are designing mostly residential or commercial projects, and whether you prefer a free or paid tool, I can help narrow down the best fit for your workflow.

Here are top web results for exploring this topic:

SolarEdge·https://www.solaredge.com Designer: Free SolarEdge solar design software tool SolarEdge Designer is a free solar design tool that helps PV professionals like yourself lower PV design costs and close more deals. Find out more. ... Generate exceptional PV designs for maximized en Solargraf·https://www.solargraf.com Solar Shading Analysis Software : Accurate Shading and Production ...Shadows from trees, buildings, and other obstructions can cause voltage fluctuations and lower energy output, making shading analysis a vital step in solar system design. Importance of shading analysi Scanifly·https://scanifly.com Scanifly: The #1 Solar Design Software for Quality-Obsessed ...Scanifly is the only solar design software that lets contractors design instantly with AI, then verify with drones—all in one place. Qbits Energy·https://qbitsenergy.com Solar Shading Analysis Software : 2026 Guide - Qbits Energy AI Solar Design 2026: Clara AI Leads. AI solar design lets you draft a complete layout from natural language in seconds. Here is how Clara AI in SurgePV compares with Aurora AI Mode and other AI desig GreenLancer·https://www.greenlancer.com Choosing The Best Solar Design & Proposal Software in 2026 Solar design software has become the backbone of a modern installation business. The right platform combines layout modeling, production estimates, and solar proposal software into one workflow. Insta Enphase·https://solargrafsupport.enphase.com Generate a Shade Report - Enphase Energy Getting started. Before generating a shade report, you will first need to complete the roof design and solar design for your project. To learn more about completing these steps, see: Roof Design · Sol Pylon·https://getpylon.com Pylon - #1 Solar Design Software Design with confidence. Eliminate the guesswork and design solar systems with certainty. Pylon's accurate solar calculations provides your solar design team with the confidence they need to create the OpusFlow·https://opusflow.io 10 Best Solar Design Software In 2026 - OpusFlow 4. OpenSolar: powerful and free solar design software. 10 Best solar design software in 2026 | OpusFlow. Yes, free. OpenSolar proves you don't always need a subscription to get top-quality design feat Reddit·https://www.reddit.com r/solar on Reddit: Is there any "easy-to-use" tool that approximates ...... and will then be able to produce an accurate estimate of the system's annual kWh production, and compare versions. Helioscope or Aurora are two commonly used tools by installers. 3 more replies · List.Solar·https://apps.list.solar Best 3D & Shading Analysis Software in 2026 - Solar Apps Directory 3D & Shading Analysis vs. Related Solar Software. It is easy to confuse this category with others in the solar tech stack. Here is how they differ: Solar Design Software vs. Solar Simulation Software:

Yes. If your main requirements are solar layout + shading analysis + annual production estimates, these are the strongest options:

• helioscope.aurorasolar.com — My top pick for engineering/design work. It models row-to-row and obstruction shading, and its production simulation uses hourly modeling. HelioScope says its production estimates have been independently validated to be within 1% of PVsyst.
• aurorasolar.com — Excellent if you're doing residential sales + design. It generates 3D roof models and combines shading analysis, production estimates, proposals, and sales workflows.
• opensolar.com — Best low-cost/free option to investigate first. It has 3D shading analysis and production modeling based on NREL's SAM. Independent validation found its production estimates within 0.1–1.9% of PVsyst estimates.
• pvcase.com — Better suited to larger commercial/utility projects, particularly if you need detailed CAD/terrain workflows. Its shading analysis calculates annual shading losses and irradiance on individual modules.

What I'd choose

If you tell me residential vs. commercial, approximate system size (e.g. 10 kW, 500 kW, 5 MW), and whether you need electrical design/proposals too, I can narrow it down to the best 1–2 options and compare pricing, shading accuracy, production modeling, and ease of use.

Yes. If you mean software that lays out PV modules, models 3D shading, and estimates annual/monthly energy production, there are several good options.

My top picks

1. Aurora Solar — best for residential/commercial sales

   • 3D roof modeling and remote site assessment
   • LIDAR-based shade analysis
   • Production simulations and estimates
   • Particularly good if you want customer proposals and financial analysis alongside the engineering.

2. HelioScope — my recommendation for serious PV design

   • Excellent for rooftop, carport, and ground-mount systems
   • Detailed shading analysis at the module level
   • Production reports, including 8760-hour modeling
   • Its production estimates are reported as validated to within 1% of PVsyst by third parties.
   • It also produces shade reports with Solar Access %, TSRF, and other metrics.

3. PVcase — best for large/utility-scale projects

   • Strong terrain/topography modeling
   • Detailed shading and irradiance analysis
   • Integrates with AutoCAD workflows
   • PVcase Yield handles detailed energy modeling, including shading effects.

If you just need one

I'd start with HelioScope if your primary requirement is:

“Draw the solar array → account for trees/buildings/obstructions and row-to-row shading → calculate expected kWh production.”

It has a particularly strong combination of design + shade analysis + production simulation.

If you're designing residential systems and generating sales proposals, I'd lean toward Aurora Solar instead.

If you tell me whether you're designing residential, commercial rooftops, or utility-scale, I can narrow it down to the best 2–3 options, including pricing and free/trial availability.

The market for solar design software features several top-tier platforms that handle 3D modeling, detailed shading analysis, and energy production simulations . The right choice depends heavily on your budget, whether you focus on residential or commercial projects, and if you need an all-in-one proposal tool.

Top Solar Design Platforms

• Aurora Solar : The industry standard for residential and light commercial design and sales. It features AI-assisted 3D modeling from satellite/LIDAR imagery, highly accurate shade heatmaps (TSRF), and integrated financial proposals. Great for high-volume workflows, though paid plans start around $159/month.
• HelioScope : Built primarily for commercial and industrial (C&I) system design. It excels at rapid layout creation for large flat roofs or ground mounts, advanced electrical design, and single-line diagrams (SLDs). It pairs fast simulations with bankable energy reports.
• OpenSolar : The leading free end-to-end platform. It offers robust mapping, 3D design, shading analysis, and client proposals without a software license fee for the core tool (making it ideal for startups or smaller residential installers).
• PVsyst : The gold standard for deep engineering precision and utility-scale modeling. It requires manual 3D obstruction and horizon drawing, but provides the most rigorous, universally accepted simulation metrics for financial backing and lender approval.
• SolarEdge Designer : A free tool if you are designing systems using SolarEdge hardware. It offers HD satellite imagery, automated 3D roof/shading analysis, and electrical stringing calculations.

To help narrow down the exact software you need, tell me:

• Are you designing primarily residential, commercial, or utility-scale systems?
• Do you need a tool that also generates customer-facing sales proposals and financing quotes , or just pure engineering/shading calculations?

Choosing the right solar design software depends on whether you need a quick, client-facing sales tool or a rigorous, engineering-grade simulator for complex or large-scale sites.

The top industry platforms that specialize in 3D modeling, detailed shading analysis, and accurate energy production estimates are organized below by use case:

• Aurora Solar is the industry standard for high-volume residential and light commercial projects. It features LiDAR-assisted 3D modeling, advanced near-shade and horizon obstruction analysis, and integrated financial proposals.
• HelioScope is widely favored by commercial and industrial (C&I) designers for its fast layout engine, robust electrical stringing capabilities, and dependable performance simulations.
• OpenSolar is a strong choice if you need a budget-friendly or free core platform. It offers end-to-end design, system sizing, and interactive customer proposals, though advanced features or specific add-ons may carry costs.
• SurgePV is an all-in-one cloud option that bundles rapid AI 3D roof modeling from satellite imagery with module-level, hourly shading analyses and bankable P₅₀/P₇₅/P₉₀ yield estimates.
• PVsyst is the ultimate desktop gold standard for deep engineering precision. While it lacks automated sales proposals or a streamlined UI for rapid pitching, it provides unmatched technical loss and near-shading analysis required for utility-scale bankability.

To help narrow down the ideal software for you, let me know:

• Are you designing primarily residential or commercial/utility-scale systems?
• Do you need the software to also handle sales proposals and financing or just pure engineering and yield modeling?

Yes. If by “solar design” software you mean something that can lay out panels, model obstructions/shading, and estimate annual energy production, there are several good choices.

My shortlist

If you want something to start using without spending much, I'd try OpenSolar first. Its 3D system uses NREL's SAM model and can apply shading hourly throughout the year. OpenSolar says its production estimates have been independently measured at within 0.1–1.9% of PVsyst in validation testing.

For professional commercial design, I'd lean toward HelioScope. It provides automatic layout, detailed shading analysis, and 8760-hour production simulations. Its current Basic plan is listed at $159/month per license, while Pro is $259/month; HelioScope states that its production estimates are within 1% of PVsyst.

For residential work, Aurora Solar is probably the strongest all-in-one option. It combines 3D roof modeling, LIDAR-based shade analysis, panel layout, production estimates, and sales proposals.

What I'd choose

• Just need panel layout + shading + kWh estimate: OpenSolar
• Residential installer doing lots of proposals: Aurora Solar
• Commercial/industrial rooftops: HelioScope
• Engineering reports / financing / highly detailed simulations: PVsyst
• Utility-scale ground mount: PVcase + PVsyst

If you tell me residential vs. commercial vs. utility, and roughly how large the systems are (e.g. 10 kW, 500 kW, 5 MW), I can narrow it down to the 2–3 best options and compare pricing, shading methodology, accuracy, and ease of use.