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

If you need solar design + shading + production estimates, I’d shortlist:

• OpenSolar — strong 3D shading and production modeling using SAM; good starting point and relatively accessible.
• HelioScope — excellent for commercial layouts, shading, and detailed production simulations.
• Aurora Solar — strong 3D/shading analysis, particularly for residential and commercial sales/design workflows.
• PVsyst — geared toward detailed engineering and financing-grade production studies rather than fast sales design.

If you tell me whether you're designing residential, commercial, or utility-scale systems, I can narrow it to the most suitable 2–3 options and compare pricing/features.

Here are the top-tier solar design software options that specialize in accurate 3D modeling, detailed module-level shading analysis, and bankable production estimates:

1. Aurora Solar — Widely considered the industry standard for residential and light commercial projects. It features advanced LIDAR-assisted 3D roof modeling, automated obstruction and shade detection, and bankable production simulations. Check it out on Aurora Solar.
2. HelioScope — Built specifically for commercial and utility-scale projects. It provides fast, engineering-grade simulations, single-line diagrams, and advanced shading engines without requiring a heavy desktop install. Learn more at HelioScope.
3. OpenSolar — An exceptional option if you want robust 3D design, shading analysis, and customer proposals at no subscription cost for core features. Explore the platform via OpenSolar.
4. PVsyst — The gold standard for deep, technical, and scientific-grade photovoltaic system simulations. It is heavily relied upon for large-scale engineering validation and financing, though it has a steeper learning curve than cloud-based tools. More info at PVsyst.
5. Scanifly — Best for drone-based 3D modeling and ultra-precise on-site shading analysis using proprietary viewshed technology. Details can be found on Scanifly.

To help narrow down the best fit, tell me:

• Are you designing residential or commercial/utility-scale systems?
• Do you need an all-in-one proposal and CRM tool , or purely engineering-grade simulation?

Here are the top-tier solar design software options specifically tailored for precise 3D modeling, detailed shading analysis, and bankable energy production estimates:

• 1. Aurora Solar – Widely considered an industry standard for residential and commercial US projects. It features lightning-fast remote 3D modeling (using LiDAR or user-defined polygons), highly accurate hourly 8760 energy simulation, and detailed module-level shading analysis. Explore it at Aurora Solar.
• 1. HelioScope – Excellent for commercial and high-end residential design. It pairs an ultra-fast layout engine with robust, bankable energy yield simulations and comprehensive shade-mapping tools, striking a great balance between engineering depth and clean proposals. Check it out at HelioScope.
• 1. PVsyst – The undisputed global gold standard for utility-scale and complex commercial engineering. It is the heavy-duty software that institutional investors and lenders routinely mandate for independent energy production validation reports. Learn more via PVsyst.
• 1. OpenSolar – A powerful, feature-rich platform that is completely free to use for design, 3D shading analysis, and proposals, monetizing instead via integrated services. It's fantastic for lean teams or startups wanting robust capability without massive software overhead. Visit OpenSolar.
• 1. SurgePV – A modern browser-based alternative gaining traction for accurate, module-level, 8760-hour shading analysis embedded seamlessly into the layout and sales workflow.

To help narrow down the best fit, tell me:

• Are you designing mostly residential, commercial, or utility-scale systems?
• Do you need something freemium/budget-friendly or an enterprise engineering suite?

Yes. If you mean solar PV design software that lays out panels, models shading, and estimates annual/monthly energy production, these are the strongest options:

• OpenSolar — Best starting point / free option. It has 3D site modeling, automated shading analysis, and production modeling using NREL's SAM engine. OpenSolar reports production results within about 0.1–1.9% of PVsyst in independent validation.
• HelioScope — Best for professional/commercial design. Strong 3D layout and shading simulation, detailed electrical modeling, and 8760-hour production estimates. Its simulations have been independently validated against PVsyst.
• PVsyst — Best for engineering-grade analysis. Excellent if you need detailed loss modeling, horizon/near-object shading, component-level simulation, and reports suitable for engineering/financing.
• Solargraf — Good for residential installers. Includes automated roof/PV design, hourly shading simulation, pixel-level solar-access analysis, heat maps, and production estimates.
• Aurora Solar — Best polished all-in-one sales/design platform. It generates 3D roof models, performs shading analysis, and produces production estimates using NREL-validated calculation engines.

My recommendation

If you're just starting, I'd try OpenSolar first. It gives you the core functionality you're asking for without immediately committing to expensive engineering software.

If you're doing serious engineering/commercial work, I'd choose PVsyst or HelioScope.

If you're an installer designing residential systems and generating customer proposals, I'd look hardest at Aurora Solar, Solargraf, or OpenSolar.

There's also NREL SAM, which is completely free and can model PV systems, equipment, losses, and shading, but it's more of an engineering simulation tool than an easy roof-layout/design platform.

If you tell me whether you're designing residential rooftops, commercial roofs, ground-mount systems, or DIY, I can narrow this down to the best 2–3 choices and compare price, shading accuracy, ease of use, and production calculations.

Yes. If you mean software that can lay out PV panels, model shading, and estimate annual energy production, these are the strongest options:

• aurorasolar.com — Best overall for residential/commercial sales design. It creates 3D roof models, accounts for shading from trees/buildings/obstructions, and uses detailed electrical simulation to estimate production.
• helioscope.aurorasolar.com — Best for commercial PV design. Strong array-layout and shading tools with detailed 8,760-hour production simulations; its results have been independently validated against PVsyst to within about 1% under aligned assumptions.
• opensolar.com — Best low-cost/free option. Its 3D design can automatically calculate pitch, azimuth and shading, and its SAM-based calculator provides production modeling and shade reports.
• PVsyst — Best for engineering-grade/bankable production studies. It's more technical and less convenient for sales layouts, but is widely used when detailed energy-yield analysis is required.

My recommendation

If you're an installer designing residential systems, I'd start with Aurora Solar.

If you're doing commercial rooftops/ground mounts, I'd look at HelioScope.

If you're looking for something you can try without a substantial software commitment, start with OpenSolar.

If you tell me residential vs. commercial, approximate system size, and whether you need free/cheap software, I can narrow this down to the best 2–3 options and compare price, shading accuracy, production modeling, 3D modeling, and reports.

Depending on whether you are doing residential sales proposals, deep engineering design, or highly bankable yield reports, several industry-standard software tools specialize in 3D shading and energy production estimates:

• Aurora Solar — Widely considered a top-tier platform for US residential and commercial design. It offers advanced AI-driven 3D modeling from satellite/lidar imagery, granular module-level shading analysis, and complete proposal generation. Check it out on Aurora Solar.
• HelioScope — Excellent for engineering and commercial design. It bridges the gap between raw speed and engineering depth, letting you quickly lay out arrays, model complex near-shading objects, and run real-time simulations. Learn more at HelioScope.
• PVsyst — The gold-standard desktop software for utility-scale and bankable energy yield reports. It provides deep, highly rigorous meteorological data and near-shading scene modeling, though it has a steeper learning curve than web-based sales tools. Details are available on PVsyst.
• OpenSolar — A powerful open-access/free-to-use option that includes 3D design, shading analysis, and client proposals without hefty upfront software licensing fees. Explore it at OpenSolar.
• Solargraf — Known for its fast, NREL-verified automated shading engine and accurate Solar Access Values (SAVs) calculated directly from satellite weather data. Check out Solargraf for streamlined workflows.

To help narrow down the best fit, tell me:

• Are you designing mostly residential or commercial/utility-scale systems?
• Do you need client-facing proposals and financial modeling, or purely technical engineering analysis?

Yes. If you need solar PV design software that models shading and estimates energy production, I’d shortlist these:

• HelioScope — my top pick for ease of use. It handles rooftop, carport, and ground-mount layouts, shade modeling, electrical design, and production simulations. Its simulations are reported as being within 1% of PVsyst under aligned assumptions, and it produces hourly/8760 production reports.
• PVsyst — best for engineering-grade analysis. It provides detailed hourly/sub-hourly simulations, near-object and horizon shading, electrical losses, component modeling, weather data, and detailed loss analysis. It's more complex to learn but is excellent when accuracy and bankability matter.
• Aurora Solar — best for residential/commercial sales + design. Its simulation engine can account for shading from trees, buildings, and roof obstructions at the module level and calculate the resulting production.
• System Advisor Model (SAM) — best free option. It's from NREL and can calculate PV production using detailed module/inverter models, with options for shading and other losses. It's powerful, though the design/layout experience isn't as turnkey as HelioScope or Aurora.

What I'd choose

If you're designing actual installations, I'd lean toward HelioScope. Its current plans include shade reports, production simulations, CAD exports, equipment libraries, and storage modeling; pricing currently starts at $159/month for the Basic plan.

If you tell me whether you're designing residential rooftops, commercial rooftops, ground-mount systems, or utility-scale, I can narrow this down to the best 2–3 options (including free/low-cost choices).

Choosing the right solar design software depends on your project scale (residential vs. utility), your workflow (sales-focused vs. deep engineering), and whether you need bankable finance-grade reports.

The industry standard platforms vary by specific use case:

• PVsyst: The global gold standard for engineering and bankability . Best for detailed, bank-grade yield simulations and financial sign-offs, though it has a steep learning curve and a traditional desktop interface.
• HelioScope: Best for fast, accurate commercial and residential layouts . It provides browser-based 3D modeling and shading analysis with production calculations that run within 1% of PVsyst, but with a much cleaner, quicker user interface.
• Aurora Solar: Best for US residential sales and design teams . It offers powerful automated 3D modeling (using LIDAR or high-res imagery), remote shading analysis, and integrated proposals, though it can get expensive at the enterprise tier.
• OpenSolar: Best for smaller installers looking for a zero-cost option . It is a completely free, end-to-end design, shading, and proposal platform that handles basic-to-moderate residential needs without license overhead.
• PVcase / RatedPower: Best for utility-scale and large commercial ground-mount plants, automating site selection, electrical design, and yield optimization.

To help narrow down the best fit, tell me:

• Are you designing primarily residential, commercial, or utility-scale systems?
• Do you need an all-in-one tool that also generates customer proposals/sales quotes , or purely technical/engineering yield modeling?

Yes. If you mean solar PV design software that lays out panels, analyzes shading, and estimates annual/monthly energy production, there are several strong options.

My top picks

• aurorasolar.com — Best for residential + commercial

• 3D roof/site modeling

• Shading analysis from trees, buildings, and obstructions

• Panel/inverter design

• Production estimates and financial modeling

• Particularly good if you need polished customer proposals

• Aurora says its simulation engine has been validated by NREL.

• helioscope.aurorasolar.com — Best for commercial/C&I

• Very fast array layout

• Detailed shade modeling

• 8,760-hour production simulations

• Rooftop, carport, and ground-mount designs

• Production estimates reported as within 1% of PVsyst when assumptions are aligned.

• pvsyst.com — Best for engineering/bankable studies

• Extremely detailed PV performance modeling

• Sophisticated shading and loss analysis

• Detailed weather/meteo inputs

• Strong choice when a lender, investor, or EPC requires a formal yield report

• More difficult to learn than Aurora or HelioScope.

• sam.nrel.gov — Best free option

• Free

• Detailed PV modeling

• Module/inverter specifications

• Shading and system-loss calculations

• Good if you're comfortable doing more of the engineering yourself.

What I'd choose

If you tell me (1) residential, commercial, or utility-scale, (2) your country, and (3) whether you need a free/cheap option, I can narrow this down to the 2–3 best choices and compare their actual pricing, shading capabilities, production accuracy, and ease of use.

Here are the top solar design software options that specialize in 3D shading analysis and energy production estimates, broken down by use case and budget:

1. Aurora Solar
   • Best For: Overall residential/commercial design, bankable shade reports, and client proposals.
   • Features: Industry-leading LIDAR-assisted 3D modeling, precise automated shade/solar access calculations, financial/ROI simulations, and permit-ready plan sets.
   • Check it out: Explore features via Aurora Solar.
2. OpenSolar
   • Best For: Full-featured design and proposals without a steep software subscription cost.
   • Features: Offers core 3D design, remote shade analysis, and proposal generation at no cost for core software features, making it popular for independent installers and startups.
   • Check it out: Get started on OpenSolar.
3. HelioScope
   • Best For: Commercial, industrial (C&I), and utility-scale projects.
   • Features: Fast, engineering-grade field layout and advanced simulation tools that handle complex shading, wiring zones, and performance modeling at scale.
   • Check it out: Learn more at HelioScope.
4. PVsyst
   • Best For: Deep, academic/professional engineering and near-shading simulation.
   • Features: The global standard for rigorous photovoltaic system performance calculations. It provides microscopic control over near-shading, horizon profiles, electrical effects, and hourly meteorological data.
   • Check it out: Review technical specs at PVsyst.
5. Scanifly
   • Best For: Drone-based 3D modeling and ultra-precise on-site shade analysis.
   • Features: Uses proprietary drone "vshot" technology to map environments in 3D space, calculating solar access and TSRF with extreme granularity.
   • Check it out: See how it works at Scanifly.

Could you tell me:

• Are you designing for residential, commercial, or utility scale?
• Do you prefer a free platform or a paid professional suite?

I can help narrow down the ideal tool for your specific workflow.