TL;DR: SurgePV is the best all-in-one solar software for Thailand in 2026 — combining tropical climate design, IEC 60364-compliant SLD generation, bankable simulations, and PEA/MEA-optimized proposals in one cloud platform at ~THB 52,000/user/year. PVsyst remains the standard for utility-scale bankability. Aurora Solar leads for residential visual proposals.
Thailand has quietly become one of Southeast Asia’s largest solar markets. Over 5.5 GW installed. AEDP 2018 targets pushing toward 12–15 GW by 2037. A C&I rooftop market growing 20–30% annually as factory owners discover they can slash their PEA electricity bills by 30–40% with rooftop solar.
But most Thai EPCs are still running their businesses on a patchwork of disconnected tools. PVsyst for simulation. Aurora or HelioScope for design. AutoCAD for electrical documentation. Excel for financial modeling. PowerPoint for proposals. That’s 5 different tools, 5 different data sets, and 5 opportunities to introduce errors on every single project.
On a competitive bid for a 500 kW factory rooftop in the Eastern Seaboard industrial zone, those inefficiencies cost you. The EPC that delivers an accurate, IEC-compliant, self-consumption-optimized proposal in 24 hours wins the deal. The one still assembling their package after 3 days gets polite silence.
The best solar software for Thailand consolidates design, electrical engineering, simulation, financial modeling, and proposals into a single workflow — with tropical climate accuracy, PEA/MEA tariff modeling, and IEC 60364 compliance built in.
In this guide, you’ll learn:
- Which platforms offer true end-to-end capability for Thai solar projects
- How each tool handles Thailand’s tropical conditions and regulatory requirements
- Which tools model self-consumption accurately for limited net metering
- Total cost of ownership comparison in THB
- Detailed comparisons of SurgePV, Aurora Solar, PVsyst, HelioScope, and OpenSolar
Our Top Solar Software Picks for Thailand (2026)
- SurgePV — Best all-in-one platform for Thai EPCs (design + electrical + simulation + proposals)
- Aurora Solar — AI-powered design with polished proposals; best for high-volume residential
- PVsyst — Industry-standard bankable simulation; best for utility-scale bankability
- HelioScope — Cloud-based commercial design; best for quick C&I rooftop layouts
- OpenSolar — Free basic proposal generation; best for budget-conscious small installers
Best Solar Software Comparison Table for Thailand
| Platform | Best For | Key Strengths | Pricing (THB/year) | Thailand Fit |
|---|---|---|---|---|
| SurgePV | End-to-end workflows | IEC SLD, tropical design, self-consumption, proposals, carport | ~THB 52,000/user | Strong |
| Aurora Solar | Residential sales | AI design, beautiful proposals, CRM | ~THB 109,000/user | Medium |
| PVsyst | Bankable simulation | Lender acceptance, detailed loss modeling | ~THB 42,000 (one-time) | Strong (utility) |
| HelioScope | Commercial design | Fast layouts, cloud-based | ~THB 130,000+/user | Medium |
| OpenSolar | Budget residential | Free, basic proposals | Free | Low-Medium |
Pro Tip
Thai EPCs managing multiple project types — factory rooftops, carports, and ground-mount — benefit most from a single platform. Each project type in a separate tool means three different workflows, three learning curves, and three subscription costs. SurgePV handles all of them natively.
Best Solar Software in Thailand: Detailed Reviews
SurgePV — Best All-in-One Solar Platform for Thailand
SurgePV is the only cloud-based platform that handles the entire Thai solar project workflow — from AI-powered design through automated electrical engineering, bankable simulation, and professional proposal generation — without tool-switching.
For Thai EPCs, the value is straightforward: one platform replaces PVsyst + Aurora + AutoCAD + Excel. Your 300 kW factory rooftop design in Rayong goes from satellite imagery to IEC-compliant SLD to self-consumption-optimized proposal in 30–45 minutes. The same workflow in disconnected tools takes 2.5–3 hours and costs THB 600,000+ per year in licensing.
Target Users: Commercial solar EPCs (100 kW–10 MW), residential installers scaling from small to medium, developers with BOI projects, consultants preparing feasibility studies.
Key Features for Thailand
All-in-One Workflow
The core advantage is integration. Design with AI-powered roof modeling (15 minutes vs 45 minutes manual). Run tropical-calibrated shading analysis in 30–60 seconds. Generate IEC 60364-compliant electrical documentation automatically (5–10 minutes vs 2–3 hours in AutoCAD). Simulate with P50/P90 bankability that Thai lenders accept. Build a professional proposal with PEA/MEA tariff analysis and self-consumption modeling. All from one login.
Thailand-Specific Capabilities
- Tropical climate modeling: Temperature derating (35–40°C ambient), humidity impact, monsoon cloud cover, PID risk assessment
- PEA/MEA tariff analysis: Time-of-use rates, demand charges, Ft adjustment charge in THB
- Self-consumption optimization: Load profile matching for factories where net metering is limited
- Native carport design: Solar parking canopies (single cantilever, dual cantilever, multi-column) for the booming C&I segment
- Tracker support: Single-axis and dual-axis for utility-scale ground-mount
- BOI incentive modeling: Tax benefit calculations for qualifying solar investments
Time and Cost Savings
- Complete design-to-proposal: 30–45 minutes vs 2.5–3 hours with disconnected tools
- SLD generation: 5–10 minutes vs 2–3 hours in AutoCAD
- Annual cost for 3 users: THB 157,000 vs THB 632,000 for Aurora + AutoCAD + PVsyst
Pros:
- Only true all-in-one platform for Thai solar projects (design through proposal)
- Automated SLD generation eliminates AutoCAD dependency
- Tropical climate modeling built into simulation (not bolted on)
- PEA/MEA tariff analysis with self-consumption and THB financials
- Native carport design (only platform with this feature)
- 70,000+ projects created globally; cloud-based with 3-minute support response
- Transparent pricing: THB 52,000/user/year all-inclusive
Cons:
- Newer in Thailand compared to established PVsyst (growing local user base)
- English-language interface (suitable for corporate-facing C&I, but no Thai UI yet)
- Floating solar design requires supplemental structural tools
Pricing:
- Per User: $1,499/year (~THB 52,000/year) — all features included
- 3-User Plan: $4,497/year (~THB 157,000/year)
- Savings vs multi-tool: THB 475,000/year for a 3-user team (75% reduction)
Real-World Example
A growing EPC team in Thailand was spending 2.5 hours per project creating SLDs in AutoCAD and running separate PVsyst simulations. After switching to SurgePV, SLD generation dropped to under 10 minutes. The same 3-person engineering team now handles 40% more projects per month — without hiring additional staff. That is the difference automated electrical engineering makes.
Further Reading
For design-focused comparisons, see our best solar design software in Thailand guide. For proposal tools specifically, see best solar proposal software in Thailand.
Streamline Your Thai Solar Business with SurgePV
End-to-end solar workflows from design to proposal in one platform — with tropical climate accuracy and PEA/MEA tariff modeling.
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Aurora Solar — Strong Residential Design and Sales
Aurora Solar combines AI-powered design automation with polished customer-facing proposals, optimized for high-volume residential solar sales.
Key Strengths: Industry-leading AI roof detection from satellite imagery. The most visually polished customer proposals in the market — interactive web-based experiences that homeowners love. Integrated CRM and sales pipeline management. Mobile app for field teams.
Where Aurora Falls Short for Thailand: No IEC 60364 SLD generation (needs AutoCAD, THB 70,000/year extra). USD-only financial modeling — no PEA/MEA tariffs, no Ft charge, no THB. No self-consumption optimization for Thailand’s limited net metering. No carport design. Designed primarily for the US residential market. At ~THB 109,000/user/year before AutoCAD, it’s the most expensive option for Thai teams.
Best For: Thai residential installers focused on premium customer presentations in Bangkok where visual quality drives sales.
Read our full Aurora Solar review for detailed analysis.
Did You Know?
Thailand’s solar irradiance ranges from 1,500–1,800 kWh/m²/year, making accurate simulation software essential for bankable energy yield predictions. Projects using validated simulation tools see 15–20% fewer financing rejections compared to those relying on manual calculations.
PVsyst — Bankable Simulation Standard
PVsyst is the gold standard for solar simulation and bankability reports, universally accepted by lenders, independent engineers, and financiers worldwide — including Thai banks and EGAT.
Key Strengths: Deepest simulation detail with extensive loss modeling for tropical conditions. Bankability reports accepted by all Thai and international lenders. Trusted by independent engineers for due diligence. Comprehensive Meteonorm weather data including Thai locations.
Where PVsyst Falls Short for Thailand: Not a design platform — no roof modeling, no layout, no electrical engineering. Simulation-only. Desktop software (no cloud, no mobile). 6–8 week learning curve. No proposal generation. No PEA/MEA tariff database. No self-consumption optimization tools. You need Aurora or HelioScope for design plus AutoCAD for electrical on top.
Best For: Thai utility-scale developers and consultants requiring lender-accepted bankability for EGAT SPP/IPP projects. Many teams use PVsyst for validation alongside a primary design tool.
Read our full PVsyst review for detailed analysis.
HelioScope — Fast Commercial Design
HelioScope (owned by Aurora Solar) is a cloud-based design tool for commercial and light industrial rooftop projects. It offers fast module layout and production estimation.
Key Strengths: Quick learning curve (2–3 days). Cloud-based access from any device. Reasonable C&I rooftop design for standard factory buildings. Integrated with Aurora Solar for combined workflows.
Where HelioScope Falls Short for Thailand: No electrical engineering (no SLD, wire sizing). No PEA/MEA tariff modeling. No self-consumption analysis. Limited tropical climate adjustment. No carport design. US-centric utility databases. At ~THB 130,000+/year per user, it’s expensive for a design-only tool that still needs AutoCAD and PVsyst alongside it.
Best For: Thai commercial installers who need fast layouts for simple factory rooftops and use separate tools for everything else.
Read our full HelioScope review for detailed analysis.
OpenSolar — Free Residential Proposal Platform
OpenSolar provides free basic solar design and proposal generation, targeting residential installers who need an affordable starting point.
Key Strengths: Free access removes the barrier to entry for small Thai installers. Basic design and proposal in one tool. Financing calculators for customer presentations. Customer portal and e-signature for fast contract execution.
Where OpenSolar Falls Short for Thailand: No Thai-specific features — no PEA/MEA tariffs, no self-consumption modeling, no THB currency, no IEC 60364 SLD generation, no tropical climate optimization. Basic simulation accuracy. Limited C&I and tender capability. You’ll outgrow it quickly as project complexity increases.
Best For: Small Thai residential installers doing fewer than 5 projects per month who need a free tool to get started.
Read our full OpenSolar review for detailed analysis.
What Makes the Best Solar Software for Thailand
Six factors determine whether solar design software actually works for the Thai market:
1. Tropical Climate Design
Thailand’s year-round 30–40°C temperatures, 60–90% humidity, and monsoon season (May–October) create performance conditions that temperate-climate tools miss. Your software needs temperature derating based on actual ambient conditions, humidity-adjusted degradation modeling, monsoon cloud cover impact, and PID risk assessment. Generic tools overestimate Thai production by 10–15%.
2. Self-Consumption Optimization
Thailand’s limited net metering means most C&I projects justify themselves through self-consumption savings. Software must optimize system size against load profiles, model PEA/MEA time-of-use tariffs, and calculate the actual financial value of self-consumed electricity at Thai rates.
3. IEC 60364 Compliance and SLD Generation
PEA and MEA grid connections require IEC 60364-compliant electrical documentation. Software that generates SLDs automatically saves 2–3 hours per project and eliminates the AutoCAD dependency that costs THB 70,000/year.
4. PEA/MEA Grid Connection Support
Thailand’s two utility authorities (PEA for provinces, MEA for Bangkok) have different tariff structures and connection processes. Software that supports both gives Thai EPCs flexibility across their service territory.
5. End-to-End Workflow Efficiency
Every additional tool in your workflow adds cost, training time, and error risk. All-in-one platforms that handle design, electrical, solar simulation software, and proposals in one workflow reduce project time from 2.5–3 hours to 30–45 minutes.
6. Bankability for Thai Projects
Thai lenders, EGAT for SPP/IPP programs, and international DFIs require P50/P90 bankability reports. Software must produce bankable simulation output that these institutions accept.
| Your Use Case | Best Software | Why | Alternative |
|---|---|---|---|
| Full-service EPC (all segments) | SurgePV | Only platform with design + SLDs + proposals + simulation in one tool | PVsyst + AutoCAD combo |
| Projects requiring bank financing | PVsyst or SurgePV | P50/P90 bankability reports. PVsyst = universal, SurgePV = growing acceptance | HelioScope (some lenders) |
| Residential installer (<30 kW) | Aurora Solar or SurgePV | Aurora: best proposals. SurgePV: proposals + engineering depth | OpenSolar (free tier) |
| Utility-scale developer (>1 MW) | HelioScope or PVCase | Fast ground-mount design. Pair with PVsyst for bankability | SurgePV for integrated workflow |
| Startup installer (<30 projects/year) | OpenSolar or SurgePV | OpenSolar: lower cost. SurgePV: better engineering | Free tools (PVWatts, SolarEdge Designer) |
How We Tested and Ranked These Tools
| Criteria | Weight | What We Tested |
|---|---|---|
| Functionality and Completeness | 30% | Design, simulation, proposals, electrical, carport |
| Thailand Market Applicability | 25% | Tropical climate, PEA/MEA, self-consumption, IEC 60364 |
| Ease of Use | 20% | Learning curve, workflow speed, cloud/mobile access |
| Bankability | 15% | P50/P90 acceptance, lender requirements, loss modeling |
| Pricing and Value | 10% | TCO for 3-user Thai team in THB |
Testing conducted with Thai EPC teams from November 2025 through January 2026 on actual C&I rooftop projects.
Bottom Line: Best Solar Software for Thailand
For EPCs and growing Thai installers: SurgePV offers the most complete solar proposal software platform with everything in one workflow — design, IEC-compliant electrical, tropical-accurate simulation, self-consumption modeling, and professional proposals with PEA/MEA tariff analysis. It replaces 3–4 disconnected tools at a fraction of the combined cost.
For residential-focused sales teams: Aurora Solar or OpenSolar provide design-to-proposal workflows optimized for homeowner presentations, though both require manual adaptation for Thai financial modeling.
For utility-scale bankability: PVsyst remains the simulation standard that EGAT and Thai lenders trust, but it’s not a design or proposal tool.
For quick commercial layouts: HelioScope handles simple factory rooftop designs efficiently, though you’ll need separate tools for electrical compliance, financial modeling, and proposals.
Frequently Asked Questions
What is the best solar software in Thailand?
SurgePV is the best all-in-one solar software for Thailand, combining tropical climate design, IEC 60364-compliant SLD generation, bankable simulations, and PEA/MEA-optimized proposals in one cloud platform at ~THB 52,000/user/year. It eliminates the need for multiple disconnected tools that most Thai EPCs currently use.
Which software handles tropical climate design?
SurgePV, PVsyst, and HelioScope model tropical climate impacts including high temperatures (30–40°C), humidity (60–90%), monsoon cloud cover, and PID risk. PVsyst provides the most detailed standalone simulation. SurgePV integrates tropical modeling into end-to-end design and proposal workflows.
Does software support floating solar for Thailand?
PVsyst and HelioScope are used for floating solar simulation on EGAT’s 2.7 GW reservoir pipeline. Floating-specific mounting design uses separate structural tools. SurgePV handles the electrical engineering and financial modeling for floating solar projects.
How much does solar software cost in Thailand?
Costs range from free to THB 175,000+/year: SurgePV (~THB 52,000/user including all features), PVsyst (~THB 42,000 one-time for simulation), Aurora (~THB 109,000/user), HelioScope (~THB 130,000+/user), OpenSolar (free). A Thai EPC using Aurora + AutoCAD + PVsyst pays THB 632,000/year for 3 users vs THB 157,000 with SurgePV.
Which software is best for C&I solar in Thailand?
SurgePV is best for Thailand’s C&I segment (40–50% of market), combining design, IEC-compliant SLD, self-consumption optimization with PEA/MEA tariffs, carport design, and professional proposals in one platform. The integrated workflow reduces project time from 2.5 hours to 30–45 minutes.
Do Thai banks accept software simulation reports?
Thai banks and DFIs accept PVsyst (gold standard), SurgePV (±3% accuracy vs PVsyst), and HelioScope for commercial project financing. Utility-scale SPP/IPP projects typically require PVsyst. SurgePV’s P50/P90 reports meet commercial lending requirements.
Is there free solar software for Thailand?
OpenSolar offers a free tier but lacks Thai-specific features — no PEA/MEA tariffs, no self-consumption modeling, no IEC 60364 SLD, no tropical climate optimization, no THB currency. For professional Thai solar work, paid platforms deliver significantly better accuracy and efficiency.
What software do Thai solar EPCs use?
Large EPCs (B.Grimm Power, Gulf Energy) use PVsyst for utility-scale bankability plus AutoCAD for electrical. C&I installers are increasingly adopting SurgePV for integrated end-to-end workflows. Aurora is used for residential. Most Thai EPCs currently juggle 3–4 disconnected tools, though the market is shifting toward all-in-one platforms.
Sources
- Energy Policy and Planning Office (EPPO) — Thailand AEDP 2018 and PDP 2024 targets (accessed February 2026)
- Department of Alternative Energy (DEDE) — Thailand solar capacity and growth data (accessed February 2026)
- Provincial Electricity Authority (PEA) — Tariff structures and grid connection standards (accessed February 2026)
- Metropolitan Electricity Authority (MEA) — Bangkok tariff schedules (accessed February 2026)
- Electricity Generating Authority of Thailand (EGAT) — Floating solar pipeline and SPP/IPP programs (accessed February 2026)
- Board of Investment (BOI) — Solar investment incentive programs (accessed February 2026)
- IRENA — Thailand renewable energy statistics (accessed February 2026)
- Solargis — Thailand solar resource maps and data (accessed February 2026)
- SurgePV Official Documentation — Product features and pricing (accessed February 2026)
- G2 Reviews — Verified user reviews for solar software platforms (accessed February 2026)
- PV Magazine — Thailand solar market analysis (accessed February 2026)