The Best Solar Software in 2026
We researched solar software from official websites, including pricing pages, plan tables and product documentation. Rankings focus on each product’s core solar workflow, value for money and verified features, so buyers can compare design, modeling, proposals and monitoring capabilities in one category.
Our top picks
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Top ranked
OpenSolar#1 of 189.2/10A free core app covers solar design, sales and project management in one workflow.
Free plan · 30-day trial
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Runner-up
Aurora Solar#2 of 189.0/10A detailed solar sales and design workspace, with a $159-per-user monthly entry price.
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Top-ranked free plan
System Advisor Model (SAM)#8 of 188.1/10Open-source PV and project-finance modeling for analysts who want desktop tools and scripting.
Free plan
Advertiser disclosure: iTechGuides is reader-supported. Vendors can pay for top positions in our rankings and for a place on other products' pages, and we may earn a commission when you click some links. Bought places stand at the number bought; this page and our disclosure say so. Paying vendors may get a fuller, more detailed review from our editors, and that review can change their score. How we rank.
The full ranking 18 tools, best first
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Best forSolar teams wanting an end-to-end workflow at no cost
A free core app covers solar design, sales and project management in one workflow.
Free plan · 30-day trial Our OpenSolar verdict → Visit OpenSolarFor vendors Sponsor this spot · #1 · $149/mo →9.2/10★★★★★Visit OpenSolar -
Best forSales teams needing detailed designs and proposals
A detailed solar sales and design workspace, with a $159-per-user monthly entry price.
9.0/10★★★★☆Visit Aurora Solar -
Best forInstallers needing proposals and automated permit plans
A web-based solar design and sales tool with proposal, financing, and permit workflows.
- Permit documentation
- Proposal builder
- PV design & simulation
8.8/10★★★★☆Visit Solargraf -
Best forTeams modeling storage projects through monitoring
A web suite spanning storage modeling, economics, proposals, dispatch, and monitoring.
- System monitoring
- Proposal builder
- PV design & simulation
8.6/10★★★★☆See Energy Toolbase -
Best forMid-market and enterprise solar project teams
A broad solar design and development suite for terrain-aware, large-scale projects.
- Permit documentation
- Proposal builder
- PV design & simulation
8.5/10★★★★☆Visit PVcase -
Best forModelers needing detailed PV simulation and analysis
Detailed PV simulation, shading, storage and financial analysis for Windows.
- PV design & simulation
- Financial modeling
8.4/10★★★★☆Visit PVsyst -
Best forDesktop users designing and documenting PV systems
A desktop PV design tool spanning system simulation, financial analysis and project documentation.
- Permit documentation
- PV design & simulation
- Financial modeling
8.2/10★★★★☆Visit BlueSol -
Best forAnalysts seeking free, scriptable PV and financial modeling
Open-source PV and project-finance modeling for analysts who want desktop tools and scripting.
- PV design & simulation
- Financial modeling
8.1/10★★★★☆Visit SAM -
Best forDesktop users focused on PV design and yield analysis
A Windows desktop tool for PV design, shading, yield, storage, and financial analysis.
- PV design & simulation
- Financial modeling
8.0/10★★★★☆Contact Valentin -
Best forBIM-oriented teams needing detailed PV design
A Windows desktop PV design tool for teams working across BIM, electrical sizing and project economics.
- PV design & simulation
- Financial modeling
7.9/10★★★★☆Visit Solarius-PV -
Best forTeams wanting PV modeling with a free entry tier
Web-based PV modeling with a free tier and paid tools for detailed design and analysis.
- PV design & simulation
- Financial modeling
7.8/10★★★★☆Visit archelios -
Best forInstallers combining drone surveys with permit workflows
Connect drone surveys to 3D solar design, proposals and permit documentation.
- Permit documentation
- Proposal builder
- PV design & simulation
7.7/10★★★★☆Visit Scanifly -
Best forSolar teams building roof models and proposals
Pvneo combines roof modeling, solar simulations and interactive proposals in a cloud-based web app.
- Proposal builder
- PV design & simulation
- Financial modeling
7.6/10★★★★☆Visit Pvneo -
Best forTeams comparing potential PV sites and yields
A web-based tool for comparing PV sites, simulating yields, and testing project economics.
- PV design & simulation
- Financial modeling
7.5/10★★★★☆Visit Solargis -
Best forOperators needing alerts and inverter-level monitoring
A monitoring portal for operators who need inverter-level comparisons and mobile alerts.
- System monitoring
7.2/10★★★★☆Contact Solar-Log -
Best forMid-market and enterprise multi-plant operators
GPM Horizon centralizes operational visibility and asset workflows across renewable plants.
- System monitoring
7.0/10★★★★☆Visit GPM Horizon -
Best forSolarEdge installers managing commissioning in the field
A free iOS app for SolarEdge installation, commissioning, and field service workflows.
6.9/10★★★☆☆Visit SolarEdge Go -
Best forLarge developers evaluating utility-scale PV projects
A utility-scale PV evaluation platform combining 3D design, ray tracing, and exportable yield analysis.
- PV design & simulation
- Financial modeling
6.8/10★★★☆☆Visit Solargis
No tools match those filters.
Compare at a glance
| # | Tool | Free plan | Paid from | PV design & simulation | Financial modeling | Proposal builder | System monitoring | Score |
|---|---|---|---|---|---|---|---|---|
| 1 | OpenSolar | Yes | 9.2 | |||||
| 2 | Aurora Solar | No | $1,620/user/yr | 9.0 | ||||
| 3 | Solargraf | No | Yes | Yes | Yes | No | 8.8 | |
| 4 | Energy Toolbase | No | $299/user/mo | Yes | Yes | Yes | Yes | 8.6 |
| 5 | PVcase | Yes | Yes | Yes | 8.5 | |||
| 6 | PVsyst | No | 25 CHF/device/yr | Yes | Yes | No | No | 8.4 |
| 7 | BlueSol | No | Yes | Yes | 8.2 | |||
| 8 | System Advisor Model (SAM) | Yes | Free | Yes | Yes | No | No | 8.1 |
| 9 | PV*SOL | Yes | Yes | No | 8.0 | |||
| 10 | Solarius-PV | No | €599 one-time | Yes | Yes | No | No | 7.9 |
| 11 | archelios Suite | Yes | €990/yr | Yes | Yes | 7.8 | ||
| 12 | Scanifly | No | Yes | Yes | Yes | No | 7.7 | |
| 13 | Pvneo | No | Yes | Yes | Yes | 7.6 | ||
| 14 | Solargis Prospect | No | €2,400/yr | Yes | Yes | No | No | 7.5 |
| 15 | Solar-Log WEB | No | No | No | Yes | 7.2 | ||
| 16 | GPM Horizon | No | No | No | Yes | 7.0 | ||
| 17 | SolarEdge Go | Yes | Free | 6.9 | ||||
| 18 | Solargis Evaluate | No | Yes | Yes | No | No | 6.8 |
Head-to-head All 28 comparisons →
- OpenSolar vs Aurora Solar
- OpenSolar vs Solargraf
- OpenSolar vs Energy Toolbase
- OpenSolar vs PVcase
- OpenSolar vs PVsyst
- OpenSolar vs BlueSol
- OpenSolar vs System Advisor Model (SAM)
- Aurora Solar vs Solargraf
- Aurora Solar vs Energy Toolbase
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How we rank solar software
Every tool on this page was researched by iTechGuides Editors from its official website — pricing pages, plan tables and product documentation. We rank on how well each one does this category's core job, what the free or entry plan includes, and where it falls short. Where we have enough verified facts, the score out of 10 is a rubric — job fit, value and how much we could verify — shown with its breakdown on every tool's page; a tool we have not verified enough to score yet shows its rank without a number. Scores are re-checked when a product changes its plans. Read the full editorial policy, or submit a tool we missed.
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
Last updated · How we research and update