Best Solar Design Software in Slovenia (2026)

TL;DR: SurgePV is the best all-in-one solar design software for Slovenia in 2026 — combining automated SLD generation for all five DSOs, 8760-hour shading analysis, samooskrba self-supply modeling, and Eco Fund subsidy calculations at $1,899/year for 3 users. PVsyst remains the bankability gold standard for commercial financing. PV*SOL is the strongest European residential desktop option.

Slovenia is punching above its weight. A country of just 2 million people has pushed past 900 MW of installed solar — and the government wants 3.3 GW by 2030 (Slovenia NECP). That is nearly four times today’s capacity. In a market this small and this fast-moving, every project matters.

But here is where it gets tricky. Five separate DSOs. The samooskrba self-supply scheme with strict annual consumption matching. Eco Fund subsidies that open in periodic windows. Alpine snow loading in Gorenjska. Mediterranean irradiance in Primorska.

Most solar design tools were built for larger, simpler markets — and they don’t handle any of this natively.

Pick the wrong platform, and you are manually adjusting every project for net metering calculations, subsidy impacts, and DSO documentation. Pick the right one, and those hours disappear.

We tested and compared the top 5 solar design platforms for Slovenia, evaluating each on self-supply modeling, grid compliance, alpine terrain handling, simulation accuracy, and pricing.

In this guide, you’ll learn:

• Which platform handles all five Slovenian DSO grid connection requirements
• How pricing compares across tools (from EUR 950/year to over EUR 2,900/year)
• Which software models samooskrba self-supply sizing and Eco Fund subsidies accurately
• Our recommendation based on 400+ commercial projects across Europe

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Quick Comparison Table

Software	Best For	Pricing/Year	SLD Generation	Self-Supply
SurgePV	All segments (end-to-end)	$1,899 (3 users)	Yes (automated)	Yes (samooskrba)
Aurora Solar	Residential proposals	~EUR 2,900/yr	No	No
PVsyst	Bankable simulations	~EUR 1,050/yr	No	No
HelioScope	Commercial C&I design	~EUR 2,900+/yr	No	No
PV*SOL	European residential	EUR 950-1,900	No	Basic

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Best Solar Design Software in Slovenia (Detailed Reviews)

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

Best For: EPCs and installers across all segments (self-supply, commercial, utility)

Pricing: $1,899/year (3 users); $1,499/user/year (For 3 Users plan)

Onboarding: 2-3 weeks

SurgePV is an end-to-end solar design and engineering platform that combines layout design, electrical engineering, bankable simulations, and proposal generation in a single cloud-based tool.

For Slovenia specifically, that single-platform approach solves the biggest pain point local installers face.

Here is the problem: most competing tools force you to juggle 2-3 separate applications for a complete project. Design in one tool, draft single line diagrams in AutoCAD for the DSO, run simulations in PVsyst, then build proposals manually. That workflow adds hours per project and thousands in extra software licenses. In a market where 200-350 installers compete for every customer, those hours are the difference between winning and losing the job.

SurgePV eliminates that entirely.

Key Features for Slovenia

• Automated SLD generation — Creates code-compliant electrical schematics in 5-10 minutes for all five Slovenian DSOs (Elektro Ljubljana, Maribor, Celje, Gorenjska, Primorska). Manual AutoCAD drafting takes 2-3 hours for the same output.
• P50/P75/P90 bankability metrics — Produces the production estimates Slovenian banks (NLB, Nova KBM) and commercial lenders require. Accuracy within +/-3% of PVsyst. That means your financing applications include the data lenders actually need — not just optimistic estimates that delay approvals.
• 8760-hour shading analysis — Hour-by-hour simulation across the full year. Critical for Slovenia’s diverse terrain, where alpine mountain shading in Gorenjska behaves completely differently from coastal conditions in Primorska.
• Self-supply (samooskrba) modeling — System sizing matched to annual consumption with net metering calculations at Slovenian retail rates (EUR 0.16-0.22/kWh). Eco Fund subsidy integration (EUR 180/kW, up to EUR 3,000) shows customers pre- and post-subsidy payback. Customers see the exact financial picture — including subsidies — before signing.
• Native carport and tracker design — SurgePV is the only platform with built-in solar carport design. Single-axis and dual-axis tracker support included. With Slovenia’s commercial parking installations growing, this gives you project types other tools simply cannot handle.
• Financial modeling — Supports EUR payback analysis, IRR, and NPV calculations with electricity escalation rates for Slovenian tariff structures.
• Wire sizing and voltage drop calculations — Instant automated calculations per IEC standards, eliminating manual spreadsheet work. No more cross-referencing code tables — and zero risk of undersized cables failing DSO inspection.

Pricing

Plan	Price	Users
Individual	$1,899/year	3 users
For 3 Users	$1,499/user/year	3 users
For 5 Users	$1,299/user/year	5 users
Enterprise	Custom	Multiple

All features included on every plan. No hidden fees, no feature gating. See full pricing.

Who SurgePV Is Best for in Slovenia

• Installers handling self-supply (samooskrba) projects needing fast sizing and Eco Fund calculations
• Commercial EPCs handling 50 kW-5 MW projects needing DSO-compliant SLDs
• Companies needing bankable P50/P90 reports for Slovenian bank financing
• Teams looking to eliminate AutoCAD dependency and reduce per-project costs

Limitations

• English interface (no Slovenian localization yet)
• Slovenian DSO utility rates require manual input (not pre-loaded)

SurgePV launched more recently than PVsyst’s 30-year head start or Aurora Solar’s hundreds of millions in US marketing — 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 that no other platform offers natively.

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Aurora Solar — Best for Slovenian Residential Sales Workflows

Best For: Larger installers focused on residential proposals

Pricing: ~EUR 2,900/year ($3,108/year)

Aurora Solar is best known for its AI-powered roof modeling and polished sales proposals. It leads the US residential market and its design tools are genuinely strong for rooftop solar layout.

What Works for Slovenia

• Industry-leading automatic 3D roof detection speeds up residential design
• Beautiful, interactive client-facing proposals help close deals
• CRM integrations (Salesforce, HubSpot) streamline larger sales operations

Where It Falls Short in Slovenia

• No samooskrba modeling — Cannot size systems to match annual consumption per Slovenia’s self-supply rules
• No Eco Fund integration — EUR 180/kW subsidies must be calculated and added manually
• No SLD generation — DSO grid connection documentation requires separate AutoCAD (~EUR 2,000/year)
• US-centric pricing — ~EUR 2,900/year is steep for Slovenian installer margins
• USD proposals — Generates USD by default, requiring manual EUR conversion for Slovenian customers

Best for: Larger Slovenian installers with international operations who prioritize sales presentation over local regulatory features.

For a deeper analysis, read our full Aurora Solar review.

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PVsyst — Simulation Gold Standard for Slovenian Bankable Reports

Best For: Engineers focused on utility-scale and commercial bankable simulations

Pricing: ~EUR 1,050/year (CHF 1,100) plus AutoCAD ~EUR 2,000/year for complete workflow

PVsyst is the industry reference for bankable energy production estimates. If you are seeking project financing from Slovenian banks like NLB or Nova KBM, PVsyst reports carry unmatched credibility with evaluators.

What Works for Slovenia

• Universally accepted by Slovenian banks and financing institutions
• Detailed loss modeling (temperature, soiling, mismatch, inverter efficiency)
• P50/P90 reports are the gold standard for project financing
• Meteonorm integration includes Slovenian weather data across all regions

Where It Falls Short in Slovenia

• Not a design platform — PVsyst is simulation-only. You need a separate tool for layout design
• No SLD generation — Electrical documentation requires external CAD tools
• No proposal generation — Cannot produce client-facing sales documents
• No self-supply modeling — Cannot calculate samooskrba sizing or Eco Fund subsidies
• Desktop-only — No cloud collaboration, limiting team workflows

Best for: Engineering teams focused on commercial and utility-scale projects where bankable simulations are the primary requirement.

Read our full PVsyst review for a detailed breakdown.

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HelioScope — Fast Commercial Solar Design for Slovenia

Best For: Commercial EPCs designing 50 kW-5 MW rooftop systems

Pricing: ~EUR 2,900+/year

HelioScope is a cloud-based design platform focused on commercial and industrial (C&I) solar projects. Its browser-based CAD tools make it fast to learn and fast to use for mid-scale rooftop work.

What Works for Slovenia

• Fast commercial rooftop design in a browser-based interface
• Integrated simulation with credible production estimates
• Supports Slovenian locations with international weather data
• Team collaboration through cloud-based project sharing

Where It Falls Short in Slovenia

• No SLD generation — Commercial projects requiring DSO electrical documentation need external tools
• No self-supply features — Cannot model samooskrba sizing or Eco Fund subsidies
• Limited residential tools — Not optimized for Slovenia’s dominant self-supply residential segment (50% of market)
• Contact-for-pricing model — Typically ~EUR 2,900+/year, but not transparent

Best for: Commercial EPCs designing 50 kW-5 MW rooftop systems in Slovenia who prioritize speed over local regulatory features.

See our full HelioScope review for more details.

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PV*SOL — European Residential Design Tool for Slovenia

Best For: Residential installers familiar with European software tools

Pricing: EUR 950-1,900/license

PV*SOL is a German-developed desktop tool built for the European market. Its strength is detailed residential design with strong battery storage modeling — important as 30-40% of Slovenian residential buyers now ask about storage.

What Works for Slovenia

• European-focused with some Slovenian climate data included
• Strong battery storage modeling for self-consumption optimization
• Good residential 3D visualization for tile rooftops
• IEC-standard electrical calculations

Where It Falls Short in Slovenia

• No SLD generation — DSO grid connection documentation requires external CAD software
• No Eco Fund integration — Subsidy calculations must be done manually
• Desktop-only — No cloud collaboration for team-based workflows
• Limited proposal generation — Basic output compared to SurgePV or Aurora Solar
• No samooskrba sizing — Cannot automatically match system to annual consumption

Best for: Slovenian residential installers already familiar with European tools who want solid battery modeling and residential design.

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Solar Design Software Comparison Table for Slovenia

Feature	SurgePV	Aurora Solar	PVsyst	HelioScope	PV*SOL
Best for	All segments	Residential	Simulation	Commercial	EU residential
Self-supply sizing	Yes (samooskrba)	No	No	No	Basic
SLD generation	Yes (automated)	No	No	No	No
P50/P90 reports	Yes	P50 only	Yes (gold standard)	Yes	Good
Eco Fund calculator	Yes	No	No	No	No
Carport design	Yes (only platform)	No	No	No	No
Proposal generation	Yes	Yes	No	Basic	Basic
Cloud-based	Yes	Yes	No (desktop)	Yes	No (desktop)
Alpine terrain	Yes	Limited	Limited	Limited	Good
Pricing/year	$1,899 (3 users)	~EUR 2,900	~EUR 1,050	~EUR 2,900+	EUR 950-1,900

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What Slovenian Solar Projects Actually Demand From Your Software

Self-Supply (Samooskrba) System Sizing

Half of Slovenia’s solar market runs on the samooskrba self-supply scheme. The rules are specific: systems must be sized to match annual electricity consumption, with annual net metering at the retail rate (EUR 0.16-0.22/kWh). Oversizing beyond consumption means excess production is compensated at a lower rate — or donated to the grid (Agencija za energijo). Your design software needs to model this accurately, or you are either undersizing (leaving money on the table) or oversizing (creating a poor financial case for the customer).

DSO Grid Compliance (5 Regional Operators)

Slovenia has five regional DSOs — Elektro Ljubljana, Elektro Maribor, Elektro Celje, Elektro Gorenjska, and Elektro Primorska. Each requires technical documentation including single line diagrams, protection device specifications, and inverter details for grid connection approval. Software that generates SLDs automatically — like SurgePV — saves 2-3 hours per project compared to manual AutoCAD drafting. With 20 projects per month, that is 40-60 hours saved — essentially a full-time employee’s monthly capacity.

Alpine Terrain and Snow Loading

Slovenia’s geography is unusually diverse for a country its size. Alpine regions in the north (Gorenjska, Koroska) experience heavy snowfall and require structural calculations for snow loading. Coastal Primorska enjoys Mediterranean irradiance (1,300-1,400 kWh/m2/year). Continental regions in the east (Pomurje) have hot summers and cold winters. Your shading analysis tool needs to account for mountain horizons, seasonal snow cover, and significant regional variation in solar resource.

Eco Fund (Eko Sklad) Subsidy Integration

Eco Fund provides EUR 180/kW subsidies for residential solar — up to EUR 3,000 per system. These subsidies open in periodic application windows, and homeowners expect to see the financial impact in proposals immediately. Design software that integrates subsidy calculations into financial projections automatically eliminates manual spreadsheet work and produces more accurate, persuasive proposals.

Bankability for Slovenian Financing

Commercial and utility-scale projects in Slovenia require P50/P90 production estimates for bank financing. NLB and Nova KBM expect IEC-compliant simulations. PVsyst is the gold standard. SurgePV simulations achieve +/-3% accuracy compared to PVsyst — increasingly accepted by Slovenian financial institutions for projects under 5 MW.

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Our Testing Methodology (And Why It Matters)

We evaluated each platform against five weighted criteria specific to the Slovenian market:

1. Self-supply and net metering (30%) — Samooskrba sizing, annual netting, Eco Fund subsidy calculations, financial modeling
2. Grid compliance and SLD generation (25%) — Five DSO requirements, electrical documentation, protection device specs
3. Alpine and terrain design (20%) — Snow loading, mountain shading, diverse geography from coast to Alps
4. Bankability and simulation (15%) — P50/P90 capabilities, weather data accuracy for Slovenian locations
5. Cost-effectiveness (10%) — Annual cost relative to Slovenian installer margins and team size scalability

Testing was conducted between January and February 2026, using real Slovenian project data and regulatory documentation from Agencija za energijo and the five regional DSOs.

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Bottom Line: Best Solar Design Software for Slovenia

Slovenia’s solar market is accelerating — but the combination of five DSOs, samooskrba rules, Eco Fund subsidies, and alpine terrain makes software selection more important than in simpler markets.

Here is how to choose:

For installers and EPCs across all segments: SurgePV delivers the most complete workflow. Automated SLD generation for all five DSOs, self-supply sizing with Eco Fund calculations, P50/P90 simulations for bank financing, and integrated proposals — all in one platform at $1,899/year for 3 users.

For residential sales teams: Aurora Solar offers polished proposals, but the ~EUR 2,900/year cost and missing Slovenian features (samooskrba, Eco Fund, SLDs) make it a harder sell for most local installers.

For simulation-only needs: PVsyst remains the bankability gold standard for commercial and utility-scale financing. Pair it with SurgePV for the complete design workflow.

For European residential specialists: PV*SOL offers solid residential design with strong battery modeling, but desktop-only limitations and missing SLD generation hold it back.

Slovenia’s solar targets are not slowing down. The installers winning projects today are the ones producing DSO-compliant documentation and accurate self-supply proposals faster than their competitors — not the ones still toggling between three separate tools. Your software choice is a competitive advantage in a market with 200-350 companies fighting for the same customers.

Want to see how SurgePV handles Slovenian project workflows? Book a demo and our team will walk you through a project using your actual site data.

Compare SurgePV’s pricing — transparent rates, all features included, no sales call required.

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Which Software Is Right for Your Use Case?

Your Business Profile	Recommended Software	Why This Choice
Multi-segment EPC (residential + commercial)	SurgePV	Handles all project types in one platform. Automated SLD generation eliminates AutoCAD dependency. Bankable P50/P90 simulations for commercial financing. Best all-in-one ROI for teams handling 10+ diverse projects monthly.
High-volume residential installer (50+ projects/month)	Aurora Solar or SurgePV	Aurora excels at fast residential proposals with polished visuals. SurgePV offers similar proposal quality plus electrical engineering at lower cost. Choose Aurora if budget allows and sales presentation is priority #1; choose SurgePV for better cost-per-project economics.
Utility-scale developer (financing required)	PVsyst + SurgePV	PVsyst delivers gold-standard bankable reports universally accepted by lenders and investors. Use SurgePV for initial design and electrical documentation, then validate with PVsyst for final financing submissions.
Commercial rooftop specialist	SurgePV or HelioScope	SurgePV provides complete workflow including SLD generation and proposals. HelioScope offers fast commercial layout tools but requires separate solutions for electrical and proposals.
Small installer (under 10 projects/month, tight budget)	OpenSolar or PV*SOL	OpenSolar is free for basic design and proposals. PV*SOL offers European-focused residential design at one-time cost (~EUR 1,000-1,900). Upgrade to SurgePV as you scale.
Engineering consultant (simulation specialist)	PVsyst	Simulation-only focus with deepest technical detail. Universally recognized by lenders, investors, and technical evaluators.

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When You May Not Need Advanced Solar Software

Not every solar project in Slovenia requires a full-featured design platform.

Small residential installers (under 10 projects/month): If you are handling fewer than 10 residential installations per month with straightforward roof layouts, free tools like OpenSolar or basic spreadsheet calculations may meet your needs. The learning curve and subscription costs of advanced platforms might not pay off at low volumes.

Projects outsourcing engineering: If you outsource electrical engineering to third-party firms that handle SLD generation, equipment sizing, and technical documentation, you may only need basic design and proposal tools.

Simple ground-mount arrays with no shading: Large, unshaded ground-mount installations on flat terrain with minimal design complexity can often be sized using basic calculations. If your projects don’t involve complex shading analysis, multiple roof planes, or carport structures, advanced 3D modeling may be unnecessary.

Teams with established CAD workflows: If your team is deeply proficient in AutoCAD and has efficient manual workflows for electrical documentation, transitioning to automated SLD generation may not provide immediate ROI. However, consider the time savings for new hires and scaling operations.

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Frequently Asked Questions

What is the best solar design software in Slovenia?

SurgePV is the best all-in-one solar design software for Slovenia in 2026. It combines 3D design, bankable simulations, SLD generation for all five regional DSOs, and self-supply (samooskrba) financial modeling with Eco Fund subsidy calculations at $1,899/year for 3 users. For simulation-only needs, PVsyst remains the bankability standard.

Which software supports Slovenian self-supply (samooskrba)?

SurgePV models Slovenia’s self-supply scheme with system sizing matched to annual consumption, net metering calculations, and Eco Fund subsidy integration (EUR 180/kW) for accurate financial projections. PV*SOL offers basic self-supply support but without Eco Fund integration.

What software do Slovenian solar installers use?

Slovenian installers use a mix of tools depending on project type. SurgePV covers all segments with complete workflows. PVsyst is standard for bankable simulations. HelioScope handles commercial C&I design. PV*SOL is popular for European residential projects. Aurora Solar serves larger companies with international operations.

How much does solar design software cost in Slovenia?

Costs range from EUR 950/year (PV*SOL basic) to ~EUR 2,900/year (Aurora Solar or HelioScope). SurgePV starts at $1,899/year for 3 users with all features included. PVsyst costs ~EUR 1,050/year for simulation only. Consider total cost of ownership — tools without SLD generation often require an additional EUR 2,000/year AutoCAD license.

Do I need SLD generation for Slovenian solar projects?

Yes. All five Slovenian DSOs (Elektro Ljubljana, Maribor, Celje, Gorenjska, Primorska) require single line diagrams for grid connection approval. SurgePV generates them automatically in 5-10 minutes. Other platforms require separate AutoCAD licenses costing EUR 2,000/year.

Can solar software handle Slovenia’s alpine terrain?

SurgePV models alpine terrain including mountain shading, snow loading for northern regions like Gorenjska, and diverse Slovenian geography from coastal Primorska to continental Pomurje. Its 8760-hour shading analysis accounts for seasonal variation across all three of Slovenia’s climate zones.

Which software includes Eco Fund calculations for Slovenia?

SurgePV integrates Eco Fund (Eko sklad) subsidies — EUR 180/kW, up to EUR 3,000 per system — into financial projections and proposals, showing pre- and post-subsidy payback periods for Slovenian residential customers.

Is there free solar design software for Slovenia?

OpenSolar offers a free tier but lacks Slovenian self-supply modeling, Eco Fund calculations, and DSO compliance features. PVsyst has a 30-day trial. SurgePV at $1,899/year for 3 users provides the best Slovenian market support with full design, simulation, and engineering capabilities.

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Sources

• Agencija za energijo (Energy Agency of Slovenia) — Self-supply regulations and grid connection rules
• ELES (Slovenian Transmission System Operator) — Grid codes and connection standards
• Eco Fund (Eko sklad) — Residential solar subsidies and application guidelines
• Ministry of Infrastructure of Slovenia — Energy policy and NECP targets
• IRENA — Slovenia Renewable Energy Profile — Installed capacity and growth data
• European Commission — Slovenia NECP — National Energy and Climate Plan
• Global Solar Atlas — GHI data for Slovenian regions
• G2 Aurora Solar Reviews — User reviews and ratings
• SurgePV Product Documentation — Official feature specifications (accessed February 2026)