Best Solar Design Software in Portugal (2026)

TL;DR: SurgePV is the best all-in-one solar design software for Portugal in 2026 — combining 3D roof modeling, 8760-hour shading analysis, automated SLD generation, and UPAC self-consumption modeling at $1,499/user/year. PVsyst remains the gold standard for bankable simulation reports, while OpenSolar is the strongest free option for small residential installers.

Portugal has the best solar irradiation in continental Europe. Up to 2,100 kWh/m2/year in the Algarve (PVGIS, EU Science Hub). Over 4.5 GW installed. A national target of 9 GW by 2030 under the PNEC plan (DGEG).

That’s the opportunity. Here’s the challenge.

UPAC self-consumption regulations. DGEG registration through the SERUP portal. E-REDES grid connection standards. Wholesale market injection pricing. Most international solar design tools weren’t built for any of this — and using the wrong platform costs you hours on every single project.

If you’re a Portuguese solar installer or EPC evaluating the best solar design software in Portugal, you need a platform that handles UPAC economics, generates RTIEBT-compliant electrical documentation, and produces bankable simulations accepted by Portuguese lenders like BPI, CGD, and Millennium BCP.

We tested and compared the top 5 solar design platforms for the Portuguese market — referencing regulatory requirements from DGEG, industry insights from APESF, and grid data from REN — scoring each on self-consumption modeling, simulation accuracy, electrical compliance, design speed, and total cost.

In this guide, you’ll learn:

Which platform handles UPAC self-consumption modeling and Portuguese tariff structures best
How pricing compares — from free to enterprise tier
Which tool delivers bankable P50/P90 simulations accepted by Portuguese financiers
Our recommendation based on 500+ commercial projects across Europe

Our Top Solar Design Software Picks for Portugal (2026)

SurgePV — Best end-to-end platform for Portuguese EPCs and installers (design + electrical + simulation + proposals)
Aurora Solar — Best for enterprise residential teams with large budgets
PVsyst — Gold standard for bankable simulation reports
HelioScope — Strong commercial design via Aurora platform
OpenSolar — Best free option for small residential installers

Best Solar Design Software Comparison Table for Portugal

Feature	SurgePV	Aurora Solar	PVsyst	HelioScope	OpenSolar
3D Roof Design	Yes	Yes	Limited	Yes	Basic
Bankable Simulation	Yes (P50/P90)	Good	Industry Standard	Good	Basic
SLD Generation	Yes (automated)	No	No	No	No
UPAC Self-Consumption	Yes	Basic	Yes	Basic	Basic
Proposal Generation	Professional	Professional	No	Via Aurora	Basic
Cloud-Based	Yes	Yes	No (desktop)	Yes	Yes
Wire Sizing	Automated	No	No	No	No
Commercial Structures	Carport, tracker, E-W	No	Limited	Limited	No
Pricing (Annual)	$1,499/user/yr	$3,108+/yr	~EUR 1,500/yr	$2,640+/yr	Free

Pro Tip

Portuguese EPCs running both residential and commercial projects need platforms that handle everything from UPAC self-consumption economics to RTIEBT-compliant electrical single line diagrams. Only SurgePV covers both without additional tools.

Best Solar Design Software in Portugal: Detailed Reviews

SurgePV — Best End-to-End Solar Design Platform for Portugal

Best For: EPCs and installers needing complete workflows (design + electrical + simulation + proposals)

Pricing: $1,499/user/year (approximately EUR 1,399) with all features included

Onboarding: 2–3 weeks

SurgePV is the only platform that combines AI-powered 3D design, automated SLD generation, bankable P50/P90 simulations, and professional proposal generation in one cloud workflow — without requiring AutoCAD or PVsyst.

For the Portuguese market, that integration matters. Here’s why.

UPAC self-consumption modeling is built into SurgePV’s financial engine. The platform models wholesale market injection pricing (averaging 50–80 EUR/MWh under DL 162/2019), multi-tariff period analysis for simples, bi-horario, and tri-horario rate structures, and battery storage ROI — all within the same interface where you design the system.

Electrical documentation is where SurgePV creates the biggest gap versus competitors. SurgePV generates permit-ready SLDs in 5–10 minutes. Manually drafting the same document in AutoCAD takes 2–3 hours per commercial project. For teams handling 50+ projects per month, that’s 100–150 hours saved monthly.

Automated wire sizing calculations follow IEC/CENELEC standards applicable under Portugal’s RTIEBT regulations. No more manual cross-referencing code tables — and zero risk of undersized cables failing inspection. No separate CAD license. No separate engineering team.

Simulation accuracy hits within +/-3% of PVsyst — validated across 70,000+ projects globally. SurgePV provides P50/P90 bankability metrics that Portuguese banks (BPI, CGD, Millennium BCP) are increasingly accepting for commercial project financing. Your financing applications include the bankability data lenders actually require — not just optimistic P50 estimates that get rejected.

SurgePV is the only platform with native carport solar design support, plus single-axis and dual-axis tracker modeling and east-west racking — critical for utility-scale and agrivoltaic projects across the Alentejo and Algarve regions.

Pros:

End-to-end platform: design, electrical, simulation, proposals
Automated SLD generation (saves 2–3 hours per project vs AutoCAD)
UPAC self-consumption and Portuguese tariff modeling
Bankable P50/P90 reports (+/-3% vs PVsyst accuracy)
Cloud-based collaboration, 3-minute average support response
2–3 week onboarding (vs 4–6 weeks for Aurora commercial features)

Cons:

Newer brand recognition in Portugal compared to PVsyst
Subscription model (no perpetual license option)
Advanced features require training

Best for: Portuguese EPCs and solar installers needing a complete design-to-proposal workflow with UPAC self-consumption modeling and RTIEBT-compliant electrical documentation.

Real-World Example

A mid-size EPC team in the Algarve was spending 2.5 hours per project creating SLDs in AutoCAD. After switching to SurgePV, SLD generation dropped to under 10 minutes. With the same 3-person engineering team, they now handle 40% more projects per month — without hiring additional staff.

You might be wondering: if SurgePV does all this, why haven’t I heard of it? PVsyst has had a 30-year head start. Aurora Solar has spent hundreds of millions on marketing. SurgePV launched more recently — but it has already powered 70,000+ projects globally. The platform was purpose-built for the workflow gaps that legacy tools leave open, especially automated electrical engineering, which no other platform offers natively.

Aurora Solar — Best for Enterprise Residential Teams

Best For: Large residential installation companies with enterprise budgets

Pricing: $259/user/month (monthly) or approximately $220/user/month (annual)

Aurora Solar leads the US residential market with polished AI roof modeling and visually appealing proposals. The platform is expanding into Europe, but its Portuguese market support remains limited.

What Aurora does well: Fast 3D design with industry-leading AI roof detection, beautiful customer-facing proposals, and native Salesforce/HubSpot CRM integration. For high-volume residential sales teams, those tools close deals.

Where it falls short for Portugal: No SLD generation — commercial EPCs need AutoCAD ($2,000/year additional) for electrical documentation. No native UPAC self-consumption calculators. Limited Portuguese electricity tariff database. Tiered pricing starts at $259/user/month ($3,108/year) and goes higher for commercial features.

Best for: Large Portuguese residential installers with enterprise budgets who prioritize visual sales tools over electrical engineering depth.

See our full Aurora Solar review for a detailed feature breakdown.

PVsyst — Gold Standard for Bankable Simulations

Best For: EPCs needing bankable reports for utility-scale projects and lender submissions

Pricing: CHF 1,100 (~EUR 1,150) perpetual license + CHF 350/year for updates

PVsyst is the industry-standard simulation tool. Every Portuguese bank and financial institution accepts PVsyst reports for project financing.

What PVsyst does well: Deepest simulation detail available. Granular loss analysis (soiling, temperature derating, cable losses, degradation). Over 30 years of industry validation. P50/P75/P90/P99 probability distributions.

The trade-off: PVsyst is simulation-only. No 3D design tools. No proposal generation. No SLD generation. It runs on Windows desktop only — no cloud collaboration, no remote access from job sites.

For Portuguese EPCs, this means PVsyst sits alongside other tools. You design in one platform, simulate in PVsyst, draft SLDs in AutoCAD, and build proposals in Excel or PowerPoint. That’s 3–4 tools and 4–6 hours per commercial project.

Best for: Portuguese EPCs needing bankable reports for utility-scale projects and lender submissions — used alongside a design platform. Read our full PVsyst review.

HelioScope — Commercial Design via Aurora Platform

Best For: Commercial EPCs already using Aurora who need commercial layout capabilities

Pricing: Part of Aurora Premium ($220+/user/month annual)

HelioScope is now part of Aurora Solar’s product suite, offering cloud-based commercial solar design with fast layout tools and bankable simulation output.

Strengths: Automated commercial roof and ground-mount layouts, decent simulation accuracy for commercial projects, cloud-based team collaboration.

Limitations: No SLD generation. Limited Portuguese-specific regulatory features. Requires Aurora Premium subscription. No UPAC-specific financial modeling.

Best for: Portuguese commercial solar EPCs already using Aurora who need commercial layout capabilities. Read our full HelioScope review.

OpenSolar — Best Free Option for Small Installers

Best For: Small residential installers on tight budgets handling fewer than 20 projects per month

Pricing: Free for installers

OpenSolar is the strongest free entry point for small Portuguese residential installers who need basic design and proposal tools without licensing fees.

Strengths: Free for installers (partnership model), easy to learn (1–2 week onboarding), cloud-based, basic proposal generation.

Limitations: No bankable simulations (not accepted by Portuguese lenders). No SLD generation. Limited UPAC self-consumption modeling. Basic shading analysis. Minimal commercial project support.

Did You Know?

Portugal’s Algarve region receives up to 2,100 kWh/m2/year of solar irradiation — the highest in continental Europe (PVGIS). At that resource level, even small design inaccuracies translate into significant financial errors for customers.

Best for: Small Portuguese residential installers handling fewer than 20 projects per month on tight budgets. Read our full OpenSolar review.

Design Solar Projects Faster with SurgePV

Complete design-to-proposal workflows with automated electrical engineering and bankable simulations for Portugal’s UPAC market.

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Why Most Portuguese Solar Companies Overpay for Design Software

Not all solar design software fits Portugal equally. The Portuguese market has specific requirements that separate a good tool from the right tool.

UPAC Self-Consumption Modeling

This is the single most important criterion for Portuguese installers.

Under DL 162/2019, Portugal’s UPAC (Unidade de Producao para Autoconsumo) regime allows self-consumption systems up to 1 MW. Excess energy is sold at wholesale market rates — averaging 50–80 EUR/MWh (ERSE).

Your design software must model the difference between self-consumed energy (valued at retail rates of 0.18–0.25 EUR/kWh) and grid-injected energy (valued at wholesale rates). Getting this wrong means overpromising savings to customers by 15–30%.

SurgePV and PVsyst handle this natively. Aurora Solar and OpenSolar offer only basic estimates.

Bankability for Portuguese Lenders

Portuguese banks require bankable P50/P90 simulation reports for commercial project financing.

PVsyst is the gold standard. SurgePV achieves +/-3% accuracy versus PVsyst, and its reports are gaining acceptance among Portuguese lenders (BPI, CGD, Millennium BCP). Aurora Solar provides only P50 estimates — insufficient for most commercial financing applications.

RTIEBT Electrical Compliance

Portugal follows RTIEBT (Regras Tecnicas de Instalacoes Eletricas de Baixa Tensao) for electrical installations, based on IEC/CENELEC standards.

SurgePV generates automated SLDs and wire sizing calculations compliant with these standards. Aurora Solar, PVsyst, HelioScope, and OpenSolar all lack SLD generation — forcing Portuguese EPCs to use AutoCAD ($2,000/year) and spend 2–3 hours per project on manual electrical documentation.

If your team handles 30 commercial projects per month, that’s 60–90 hours of manual SLD work. SurgePV reduces that to 2.5–5 hours total.

High-Irradiation Design Accuracy

Portugal’s southern regions (Algarve, Alentejo) experience intense solar irradiance with summer temperatures reaching 35–45 degrees Celsius. Design software must accurately model temperature derating effects on module performance.

SurgePV’s 8760-hour shading analysis captures hourly sun position, seasonal variations, and obstacle-specific shading impacts with +/-3% accuracy versus PVsyst (PVGIS).

Portuguese Financial Modeling

The right software models EUR-denominated pricing, Portuguese electricity tariff structures (simples, bi-horario, tri-horario), Fundo Ambiental subsidy calculations (Fundo Ambiental), and reduced VAT (6% IVA) on residential solar installations.

SurgePV handles these natively within its financial modeling tools. Most competitors require manual Excel adjustments.

Decision Shortcut

If you need electrical engineering (SLDs, wire sizing, code compliance), SurgePV is the only platform that automates this natively. If you’re simulation-only, PVsyst is the gold standard. If you’re residential-focused with a big marketing budget, Aurora’s proposals are unmatched — but expensive.

Our Testing Methodology

Our evaluation methodology for the Portuguese market:

UPAC self-consumption modeling (30% weight): Accuracy of self-consumption vs injection economics, multi-tariff support, battery storage ROI
Bankability and simulation accuracy (25%): P50/P90 acceptance by Portuguese banks, weather data quality, loss analysis depth
Design speed and ease of use (20%): Time from address to completed design, Portuguese roof type support, learning curve
Electrical engineering and compliance (15%): SLD generation, wire sizing per IEC/CENELEC, E-REDES documentation support
Pricing and value (10%): Total cost of ownership, ROI for typical Portuguese installer

We tested each platform on sample projects across three Portuguese regions: Algarve (2,100 kWh/m2/year), Lisbon (1,800–1,900 kWh/m2/year), and Porto (1,500–1,700 kWh/m2/year) — covering the full range of Portuguese solar conditions.

All pricing data verified against official sources as of February 2026. Prices may have changed since publication.

Bottom Line: Best Solar Design Software for Portugal

If you’re a Portuguese EPC handling residential and commercial projects: SurgePV gives you the most complete workflow. Design, electrical documentation, bankable simulations, and proposals — all in one platform. You skip AutoCAD ($2,000/year saved), skip tool-switching (1.5–2 hours saved per project), and get UPAC self-consumption modeling out of the box. At $1,499/user/year, it’s less than one-quarter the cost of an Aurora + AutoCAD setup.

If you need bankable simulation reports for lender submissions: PVsyst is still the gold standard. Use it alongside SurgePV for financial-grade validation on utility-scale projects above 500 kW. SurgePV’s PVsyst export capability means you can design in SurgePV and validate in PVsyst when lenders require it.

If you’re a small residential installer on a tight budget: OpenSolar is free and covers basic design and proposals. You’ll outgrow it when you need bankable simulations, SLD generation, or detailed UPAC modeling — but it’s a solid starting point.

If you’re an enterprise residential team with budget flexibility: Aurora Solar delivers polished sales tools and strong AI roof modeling. Budget for AutoCAD ($2,000/year) and PVsyst separately for electrical and simulation needs.

Portugal’s solar market isn’t slowing down. The EPCs winning projects today are the ones with accurate designs, compliant electrical documentation, and bankable simulations on the client’s desk same-day. Your software choice is a competitive advantage.

Book a free demo — our team will run your actual Portuguese project through SurgePV so you can compare results side by side. See transparent pricing — all features included, no hidden tiers.

Which Software Is Right for Your Use Case?

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)

Frequently Asked Questions

What is the best solar design software in Portugal?

SurgePV is the best all-in-one solar design software for Portugal in 2026. It combines 3D design, bankable P50/P90 simulations, automated SLD generation, and professional proposals with UPAC self-consumption modeling in one cloud platform at $1,499/user/year. Portuguese installers and EPCs need software that handles UPAC economics (wholesale market injection pricing), RTIEBT-compliant electrical documentation, and bankable reports for lenders. SurgePV delivers all of this in one platform, while competitors require multiple tools costing EUR 6,000+/year combined.

Does solar design software support UPAC self-consumption modeling?

Yes. SurgePV and PVsyst model self-consumption economics for Portugal’s UPAC regime, including wholesale market injection pricing, battery storage optimization, and multi-tariff period analysis required under DL 162/2019 (DGEG). UPAC self-consumption is the dominant model for residential and commercial solar in Portugal. Excess energy is sold at wholesale market rates (50–80 EUR/MWh), making accurate self-consumption vs injection modeling critical for customer ROI calculations.

Which solar software do Portuguese installers use?

Portuguese installers commonly use SurgePV, Aurora Solar, PVsyst, and OpenSolar. Solar design software tool choice depends on project scale, budget, and whether bankable simulations are needed for lender submissions. Large EPCs tend to use PVsyst for bankable simulations paired with CAD tools. Growing mid-size installers adopt SurgePV for its all-in-one workflow. Small residential installers use OpenSolar (free) or Aurora for proposals.

Do Portuguese banks accept solar software simulation reports?

Portuguese banks (BPI, CGD, Millennium BCP) accept bankable P50/P90 simulation reports from PVsyst (gold standard) and SurgePV for commercial and utility-scale project financing. SurgePV achieves +/-3% accuracy versus PVsyst with integrated design workflows, gaining acceptance among Portuguese financiers. For projects above 500 kW seeking financing, lenders require detailed energy yield analysis with P50/P90 probability ranges, loss analysis, and degradation modeling.

How much does solar design software cost in Portugal?

Solar design software costs in Portugal range from free (OpenSolar) to EUR 6,000+/year for multi-tool setups. SurgePV costs $1,499/user/year (all-in-one). PVsyst costs approximately EUR 1,150 plus EUR 350/year. Aurora Solar runs $3,108+/year. Use our solar ROI calculator to estimate your specific cost savings based on project volume.

What solar irradiation data does design software use for Portugal?

The best solar design software for Portugal uses PVGIS (EU Science Hub), Meteonorm, and SolarGIS databases. These provide high-resolution GHI data ranging from 1,500 kWh/m2/year in northern Portugal to 2,100 kWh/m2/year in the Algarve (PVGIS).

Can solar software generate DGEG-compliant documentation?

SurgePV generates technical documentation supporting DGEG registration through the SERUP portal, including system specifications, electrical designs (SLD), and energy production estimates required for UPAC and UPP registration. E-REDES grid connection compliance documentation is supported through exportable technical reports.

Which software is best for residential solar design in Portugal?

SurgePV and OpenSolar are the best options for Portuguese residential solar design. SurgePV offers complete UPAC modeling with professional proposals. OpenSolar provides free basic tools for budget-conscious small installers. For residential teams doing more than 20 projects per month, SurgePV’s automation saves significant time — generating proposals in 15–20 minutes versus 1–2 hours with manual workflows.

What is the best free solar design software for Portugal?

OpenSolar is the best free solar design software for Portuguese installers, offering basic design, simulation, and proposal tools without licensing fees. However, it lacks bankable simulation depth, SLD generation, and detailed UPAC self-consumption modeling. Teams needing these capabilities should evaluate SurgePV or PVsyst. Browse our complete solar software comparison for more options.

Sources

DGEG (Direcao-Geral de Energia e Geologia) — UPAC/UPP regulations, SERUP registration: https://www.dgeg.gov.pt
ERSE (Entidade Reguladora dos Servicos Energeticos) — Portuguese electricity tariffs: https://www.erse.pt
E-REDES — Portuguese DSO, grid connection standards: https://www.e-redes.pt
Fundo Ambiental — Government subsidy programs for residential solar: https://www.fundoambiental.pt
PVGIS (EU Science Hub) — Solar irradiation data for Portugal: https://re.jrc.ec.europa.eu/pvg_tools/
SolarPower Europe — European solar market reports: https://www.solarpowereurope.org
IEA PVPS — Portugal country data: https://iea-pvps.org
PVsyst Official — Competitor pricing and features: https://www.pvsyst.com