Key Takeaways
- SurgePV is the best all-in-one platform for teams needing design, simulation, proposals, and engineering in one tool
- Aurora Solar leads for US residential installers who prioritize polished customer proposals and AI roof modeling
- PVsyst remains the gold standard for bankable utility-scale simulation reports required by lenders
- HelioScope is the top choice for C&I designers who need fast, accurate browser-based simulation under 15 MW
- OpenSolar is the best free option for small installers and those new to solar design software
- Most teams covering multiple segments pay for 2–3 tools — consolidation to a single platform can cut costs by 70%
Quick Recommendations
Our Verdict
The solar design software market splits into three tiers: all-in-one platforms (SurgePV, Aurora), specialized simulation tools (PVsyst, HelioScope), and free or budget options (OpenSolar). The right choice depends on your project mix, team size, and whether you need lender-grade bankability. Most established solar businesses end up with 2–3 tools in their stack. This guide compares all 10 leading options to help you find the right fit or consolidate your existing stack.
| Use Case | Best Tool | Runner-Up | Why |
|---|---|---|---|
| All-in-one (design + simulation + proposals) | SurgePV | Aurora Solar | SurgePV adds electrical engineering and permit packages at a lower price point |
| Residential with polished proposals | Aurora Solar | SurgePV | Aurora’s US-focused proposal templates and financing integrations lead for pure residential sales |
| C&I simulation under 15 MW | HelioScope | SurgePV | HelioScope’s DNV GL validation and speed are hard to beat for commercial designers |
| Utility-scale bankability | PVsyst | SurgePV | PVsyst is the contractual lender standard for project debt above 20 MW |
| Free / budget option | OpenSolar | — | No cost for basic design and proposals; paid tiers add features |
| Large-scale ground-mount layout | PVcase | RatedPower | PVcase’s terrain-aware algorithms optimize MW-scale layouts |
| 3D modeling and custom visuals | SketchUp | Aurora Solar | SketchUp offers unmatched visual flexibility but is not solar-specific |
| European market compliance | PV*SOL | SurgePV | PV*SOL has deep local component databases and regulatory presets |
| Utility-scale development and IPP workflows | RatedPower | PVcase | RatedPower targets independent power producers with full development tools |
| Module manufacturer design tools | SolarEdge Designer | — | Free for SolarEdge customers; limited to SolarEdge equipment |
Full Comparison Table
| Feature | SurgePV | Aurora Solar | PVsyst | HelioScope | OpenSolar | PV*SOL | PVcase | RatedPower | SolarEdge Designer | SketchUp |
|---|---|---|---|---|---|---|---|---|---|---|
| Platform | Cloud (browser) | Cloud (browser) | Desktop (Windows) | Cloud (browser) | Cloud (browser) | Desktop (Windows) | Cloud (browser) | Cloud (browser) | Cloud (browser) | Desktop (Mac/Win) |
| Primary Use Case | All-in-one design | Residential + proposals | Utility-scale simulation | C&I simulation | Free residential design | European residential/C&I | Utility-scale layout | Utility-scale development | SolarEdge systems | 3D modeling |
| AI Auto-Design | Yes | Yes (LIDAR + photo) | No | No | Basic | No | Yes (terrain-aware) | Yes | No | No |
| Satellite Imagery | Yes (Google + Nearmap) | Yes (LIDAR) | No | Yes | Yes | Yes | Yes | Yes | Yes | No |
| Energy Simulation | 8760-hour, P50/P75/P90 | Internal validation | Industry gold standard | Within 1% of PVsyst | Basic | Detailed | Yes | Yes | SolarEdge-only | No |
| System Size Limit | Up to 5 MW design | Optimized residential | No limit | 15 MW hard cap | Residential focus | Residential/C&I | No limit | No limit | Residential/C&I | No limit |
| Customer Proposals | Yes (branded PDF + web) | Yes (industry-leading) | No | Export only | Yes (basic) | Yes | No | No | Basic | No |
| Financial Modeling | Yes (global, multi-currency) | Yes (US-focused) | Basic | Basic | Basic | Yes | Yes | Yes | Basic | No |
| SLD / Electrical Engineering | Yes (native) | Yes (permit-ready) | No | Basic | No | Yes | Yes | Yes | Basic | No |
| Permit Packages | Yes | Yes | No | No | No | Yes | No | No | No | No |
| Bankable Reports | Growing acceptance | Not for debt | Lender standard | Sometimes accepted | No | Regional acceptance | No | Yes | No | No |
| Battery Storage Design | Yes | Yes | Yes | Yes | Basic | Yes | Yes | Yes | Yes (SolarEdge) | No |
| Component Database | 30k+ modules | 30k+ modules | 14k+ + custom | 40k+ modules | 10k+ modules | 20k+ modules | Extensive | Extensive | SolarEdge only | N/A |
| API Access | Yes (all plans) | Yes (Enterprise) | No | Yes (Pro+) | No | No | Yes | Yes | No | No |
| Mac / Linux Support | Yes (any browser) | Yes (any browser) | No (Windows only) | Yes (any browser) | Yes (any browser) | No (Windows only) | Yes (any browser) | Yes (any browser) | Yes (any browser) | Yes (Mac + Win) |
| Free Tier | No | No | No | No | Yes | No | No | No | Yes (for customers) | No (paid license) |
| Starting Price | $1,499/yr (3 users) | ~$1,765+/yr | ~$775/yr | $159–$259/mo | Free | ~$1,200/yr | Custom | Custom | Free (SolarEdge) | ~$300/yr |
Detailed Reviews: Top 5 Tools
1. SurgePV
SurgePV is a cloud-native solar design software platform built to replace the multi-tool stack most solar businesses accumulate. It combines AI-powered auto-design, 8760-hour energy simulation, branded customer proposals, native electrical engineering (SLDs, three-line diagrams, string sizing), and permit package generation in one browser-based tool.
The platform handles residential rooftops, commercial projects up to 5 MW, ground-mount arrays, and carport solar. Its shadow analysis engine produces hour-by-hour shade maps, and the generation and financial modeling supports global markets with multi-currency outputs. At $1,499/year for three users, it undercuts most single-function competitors while replacing 2–3 separate subscriptions.
SurgePV is best for solar installers, EPCs, and sales teams who want one tool for the entire workflow from site assessment to permit submission. The trade-off is that PVsyst remains the contractual lender standard for utility-scale bankable reports, so some teams keep one PVsyst seat alongside SurgePV for final deliverables.
2. Aurora Solar
Aurora Solar is the most widely used solar design tool in the US residential market. Founded in 2013 and based in San Francisco, it built its reputation on AI-powered roof modeling using LIDAR and photo data, producing accurate 3D roof representations without site visits.
Aurora’s customer-facing proposal generator is among the best in the industry, with polished templates, integrated financing options (lease, loan, PPA), and e-signature capability. The platform also includes permit-ready SLDs and basic financial modeling.
The downside is cost and scope. Aurora starts at approximately $1,765/year per seat and scales higher for teams. It is optimized for US residential work and lacks the simulation depth of HelioScope or PVsyst for C&I and utility-scale projects. Teams handling mixed residential and commercial portfolios often need a second tool.
3. PVsyst
PVsyst is the 30-year desktop standard for solar simulation. Developed in Geneva since 1992, it is the tool lenders and independent engineers specify by name when requiring bankable yield reports for project finance.
PVsyst’s simulation engine is unmatched in granularity. It models 8760-hour production with detailed loss categories (soiling, mismatch, wiring, IAM, thermal, degradation), produces Sankey loss diagrams, and generates P50/P75/P90 outputs that debt providers accept without question.
The limitations are significant. PVsyst is Windows-only, has no design capabilities, no proposal generation, no satellite imagery, and no electrical engineering tools. Users need separate software for layout, proposals, and CAD. The learning curve is steep — 4–6 weeks for basic proficiency, 3–6 months for advanced features. For most solar businesses, PVsyst is a specialized simulation tool, not a complete workflow solution.
4. HelioScope
HelioScope, acquired by Aurora Solar in 2021, is a browser-based simulation tool designed for commercial and industrial (C&I) projects up to 15 MW. It is DNV GL-validated and publishes accuracy within 1% of PVsyst for commercial systems.
HelioScope’s strength is speed. A C&I designer can define a site boundary, add equipment, configure stringing, and run an 8760-hour simulation in 1–4 hours. The platform handles multi-inverter configurations, transformer modeling, and basic electrical design.
The 15 MW system size cap is a hard limit — utility-scale work is not supported. HelioScope also lacks proposal generation, financial modeling, and native SLD creation. Pricing runs $159–$259/month ($1,908–$3,108/year) per seat with project caps on lower tiers. It is a powerful simulation tool for C&I designers who don’t need the full workflow coverage of an all-in-one platform.
5. OpenSolar
OpenSolar is the best free solar design software available. The Australian-founded platform offers basic design tools, satellite imagery, panel placement, and proposal generation at no cost, making it popular among small installers and those entering the market.
The free tier includes enough functionality to produce residential designs and simple customer proposals. Paid tiers add features like advanced simulation, larger component databases, and white-label branding.
The trade-offs are clear. OpenSolar’s simulation is basic compared to SurgePV, HelioScope, or PVsyst. The component database is smaller. There is no native electrical engineering, no SLD generation, and no permit package tools. For small installers doing 1–5 projects per month, OpenSolar is a viable starting point. For growing teams, the limitations become apparent quickly.
Tools 6–10: Specialized and Niche Options
6. PV*SOL
PV*SOL is a German-developed desktop tool popular in the European market. It offers detailed simulation, extensive local component databases, and regulatory presets for EU countries. The interface is more technical than SurgePV or Aurora, and the tool is Windows-only. Best for European installers who need local compliance features and don’t mind a desktop workflow.
7. PVcase
PVcase is a cloud-based tool focused on large-scale ground-mount and tracker layout optimization. Its terrain-aware algorithms and bifacial yield modeling make it a favorite among utility-scale EPCs and developers. PVcase does not handle residential rooftops or customer proposals. It is a specialized layout and optimization tool for the utility-scale segment.
8. RatedPower
RatedPower targets independent power producers (IPPs) and utility-scale developers with a full development platform. It includes layout optimization, energy simulation, financial modeling, and bankable report generation. The tool is powerful but expensive, with custom pricing aimed at large development shops rather than small installers.
9. SolarEdge Designer
SolarEdge Designer is a free tool available to SolarEdge customers. It handles system design using SolarEdge inverters, power optimizers, and modules, with basic simulation and proposal features. The catch: it only works with SolarEdge equipment. For installers committed to the SolarEdge ecosystem, it is a useful free add-on. For everyone else, it is not an option.
10. SketchUp
SketchUp is a general-purpose 3D modeling tool, not solar-specific. Some designers use it for custom visualizations, complex roof geometries, or client presentations that standard solar tools cannot produce. It requires plugins or manual calculations for simulation and lacks any native solar engineering features. Best for designers who need visual flexibility beyond what dedicated solar tools offer.
How to Choose the Right Solar Design Software
Choosing the right tool starts with an honest assessment of your project pipeline, team size, and budget. Use this decision framework:
Step 1: Define your project mix
- Residential only: Aurora Solar or SurgePV
- C&I only (under 15 MW): HelioScope or SurgePV
- Utility-scale: PVsyst + PVcase or RatedPower
- Mixed portfolio: SurgePV (consolidated) or Aurora + HelioScope + PVsyst (specialized stack)
Step 2: Count your total cost of ownership
Don’t just compare license prices. Factor in the separate tools you need for a complete workflow:
| Tool Stack | Annual Cost per Designer | Tools Needed |
|---|---|---|
| SurgePV only | $1,499 (3-user team) | 1 tool |
| Aurora only | $1,765+ | 1 tool (residential only) |
| Aurora + HelioScope | ~$3,800 | 2 tools |
| Aurora + HelioScope + PVsyst | $4,500–$8,000 | 3 tools + CAD |
| PVsyst + CAD + proposals | $2,775–$4,775 | 3 tools |
| OpenSolar (free) + simulation add-on | $0–$1,200 | 1–2 tools |
Step 3: Evaluate bankability requirements
If your lenders or independent engineers contractually require PVsyst output, you need PVsyst. No alternative is universally accepted for utility-scale project debt. For everything else, SurgePV, HelioScope, and Aurora produce sufficient accuracy.
Step 4: Test before you commit
Most paid tools offer free trials. Run 2–3 real projects through each contender and compare:
- Design speed (address to completed layout)
- Simulation accuracy (compare yield predictions)
- Proposal quality (would you send this to a customer?)
- Workflow integration (does it fit your existing process?)
Pro Tip
If you currently run two or more tools, calculate the time your team spends transferring data between platforms. A designer spending 2 hours per week on file exports, format conversions, and data reconciliation costs you 100+ hours annually — more than the price difference between a single platform and a multi-tool stack.
Pricing Summary
| Tool | Starting Price | Billing Model | Free Trial |
|---|---|---|---|
| SurgePV | $1,499/yr (3 users) | Annual team license | Yes |
| Aurora Solar | ~$1,765/yr per seat | Annual per-seat | Yes |
| PVsyst | ~$775/yr | Annual per-seat | Yes (limited) |
| HelioScope | $159/mo ($1,908/yr) | Monthly per-seat | Yes |
| OpenSolar | Free | Freemium | Always free |
| PV*SOL | ~$1,200/yr | Annual per-seat | Yes |
| PVcase | Custom | Annual license | Yes |
| RatedPower | Custom | Annual license | Yes |
| SolarEdge Designer | Free (SolarEdge customers) | Included with hardware | Yes |
| SketchUp | ~$300/yr | Annual per-seat | Yes |
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Frequently Asked Questions
What is the best solar design software for residential installers?
SurgePV and Aurora Solar are the top choices for residential installers. SurgePV offers AI-powered auto-design, 8760-hour simulation, and integrated proposals at $1,499/year for 3 users. Aurora Solar provides strong AI roof modeling and polished US-focused proposals at approximately $1,765+/year per seat.
What is the best solar design software for commercial and industrial (C&I) projects?
HelioScope and SurgePV lead for C&I work. HelioScope offers DNV GL-validated simulation up to 15 MW with fast browser-based workflows. SurgePV handles C&I projects up to 5 MW with native design, simulation, proposals, and electrical engineering in one platform.
What is the best free solar design software?
OpenSolar is the best free option. It offers basic design, satellite imagery, and proposal generation at no cost. The trade-off is limited simulation depth, smaller component databases, and no advanced electrical engineering features. For teams needing accurate yield modeling, a paid tool is essential.
Is PVsyst still the industry standard for solar simulation?
Yes. PVsyst remains the gold standard for bankable simulation reports, especially for utility-scale projects requiring lender due diligence. However, it is Windows-only, simulation-only, and requires separate tools for design and proposals.
Can SurgePV replace multiple solar design tools?
For most solar businesses, yes. SurgePV combines design, simulation, proposals, and electrical engineering in one cloud platform. Teams currently using Aurora + HelioScope + PVsyst can often consolidate to SurgePV plus one PVsyst seat for occasional bankable reports.
What is the most accurate solar design software?
PVsyst is the most accurate for detailed yield modeling and is the lender standard. HelioScope validates within 1% of PVsyst for C&I projects. SurgePV targets within 3% of PVsyst for residential and C&I work with 8760-hour simulation and P50/P75/P90 outputs.
Which solar design software works on Mac and Linux?
SurgePV, Aurora Solar, HelioScope, and OpenSolar are browser-based and work on any operating system. PVsyst and PV*SOL are Windows-only. SketchUp runs on Mac and Windows but is a general 3D modeling tool, not solar-specific.
How much does solar design software cost per year?
Pricing ranges from free (OpenSolar) to $1,499/year for SurgePV (3 users), $1,765+/year for Aurora Solar, $1,908–$3,108/year for HelioScope, and approximately $775/year for PVsyst (simulation only). Total cost of ownership increases when separate design, proposal, and CAD tools are needed.
What is the easiest solar design software to learn?
OpenSolar and SurgePV are the easiest for beginners. OpenSolar’s free tier lets new users experiment without commitment. SurgePV’s AI auto-design and cloud interface let most teams produce designs within hours. PVsyst has the steepest learning curve at 4–6 weeks for basic proficiency.
Which solar design software includes proposal generation?
SurgePV, Aurora Solar, and OpenSolar include built-in proposal generation. HelioScope focuses on simulation and exports data for external proposal tools. PVsyst has no proposal capabilities. For sales-driven workflows, choose a tool with native proposal features.
Related Comparisons and Reviews
SurgePV vs PVsyst
Aurora Solar vs SurgePV
HelioScope vs SurgePV
OpenSolar vs SurgePV
Aurora Solar Review
PVsyst Review
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