Best Solar Design Software in Lithuania (2026)

TL;DR: SurgePV is the best overall solar design software for Lithuania — combining automated SLD generation (Litgrid/DSO compliant), P50/P90 bankable simulations, and integrated proposals in one cloud platform at $1,899/year for 3 users. PVsyst remains the bankability gold standard for projects above 1 MW requiring universal lender acceptance. Aurora Solar is the residential prosumer choice. HelioScope handles utility-scale ground-mount. PV*SOL offers German precision for cold-climate modeling.

Lithuania’s solar market is accelerating. 40-60% annual capacity growth has pushed installed PV past 280 MW, with a national target of 1 GW by 2030 under the National Energy Independence Strategy. The Baltic state’s post-2022 push for energy independence is reshaping every corner of the industry.

But designing solar systems here presents unique challenges. Litgrid grid connection documentation. Prosumer net metering thresholds at 500 kW. STR construction codes with snow loads up to 1.5 kN/m2. A Baltic climate where summer production outpaces winter by a factor of 10. Most design tools were built for sunnier, simpler markets — and they don’t handle any of this well.

If you’re designing solar systems in Lithuania, you need a platform that handles Litgrid compliance, produces bankable P50/P90 reports for Swedbank and SEB, and accounts for the extreme seasonality of Baltic irradiance.

We tested and compared the top 5 solar design software platforms for the Lithuanian market, evaluating each on regulatory compliance, simulation accuracy, electrical engineering capabilities, and pricing.

In this guide, you’ll learn:

• Which platform handles Litgrid/DSO grid connection documentation best
• How pricing compares across tools (from $990/year to over $6,800/year)
• Which software produces bankable reports accepted by Lithuanian banks (Swedbank, SEB, Luminor)
• Our recommendation based on 500+ commercial projects across Europe

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Best Solar Design Software in Lithuania (Detailed Reviews)

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

Best For: EPCs and installers across all segments

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 software platform that combines layout design, electrical engineering, bankable simulations, and proposal generation in a single cloud-based tool.

For the Lithuanian market, that matters more than you might think.

Here’s why: most competing platforms force you to switch between 2-3 separate tools for a complete commercial project. Design in one tool, export to AutoCAD for single line diagrams (SLDs), then run a separate simulation in PVsyst. That workflow adds 2-3 hours per project and costs thousands in extra licenses.

SurgePV eliminates that entirely.

Key Features for Lithuania

• Automated SLD generation — Creates IEC 60364-compliant electrical schematics in 5-10 minutes, meeting Litgrid and DSO documentation requirements. Manual AutoCAD drafting takes 2-3 hours for the same output. That means your team spends time winning projects instead of drafting diagrams that any software should produce automatically.
• P50/P75/P90 bankability metrics — Produces the production estimates Lithuanian banks (Swedbank, SEB, Luminor, DNB) require for project financing. Accuracy within +/-3% of PVsyst. Your financing applications include the exact bankability data lenders expect — not just optimistic P50 estimates that get rejected.
• 8760-hour shading analysis — Hour-by-hour simulation across the full year, critical for Lithuania’s Baltic climate at 54-56 degrees north latitude where winter sun angles create long shadows and irradiance drops to 60-90 kWh/m2 per month.
• 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 Lithuania’s commercial sector growing rapidly, this isn’t a nice-to-have — it’s a competitive edge other platforms simply don’t offer.
• Financial modeling — Supports EUR-based calculations with Lithuanian prosumer net metering rules (under 500 kW, annual settlement). Model volatile electricity prices (0.08-0.18 EUR/kWh) across multiple scenarios.
• Wire sizing and voltage drop calculations — Instant automated calculations per IEC 60364 standards, eliminating manual spreadsheet work. No more cross-referencing STR code tables — and zero risk of undersized cables failing 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 Lithuania

• Commercial EPCs handling 100 kW-5 MW projects needing Litgrid-compliant SLDs
• Prosumer solar developers working with net metering systems under 500 kW
• Installers scaling from residential to commercial who need electrical engineering without AutoCAD
• Multi-market companies operating across Lithuania, the Baltics, and the EU

Limitations

• English interface (Lithuanian localization on the 2026 roadmap)
• Smaller Lithuanian user base compared to PVsyst (established since 1992)

You might be wondering: if SurgePV does all this, why haven’t I heard of it? Fair question. 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.

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PVsyst — Simulation Gold Standard for Lithuanian Bankability

Best For: Engineers and developers focused on financed projects above 1 MW

Pricing: EUR 1,040-1,600/year (desktop license) plus AutoCAD ~$2,000/year for complete workflow

PVsyst is the industry reference for bankable energy production estimates. If you’re seeking project financing from Swedbank, SEB, or Luminor for a Lithuanian solar project, PVsyst reports carry unmatched credibility with evaluators.

What Works for Lithuania

• Universally accepted by all Lithuanian financial institutions (Swedbank, SEB, Luminor, DNB)
• PVGIS weather data integration with Lithuanian-specific irradiance data (54-56 degrees N)
• Detailed snow and shading analysis critical for Baltic climate performance
• P50/P75/P90 reports are the gold standard for project financing

Where It Falls Short in Lithuania

• Not a design platform — PVsyst is simulation-only. You’ll 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
• Desktop-only — No cloud collaboration, limiting distributed team workflows across Vilnius, Kaunas, and Klaipeda

Best for: EPCs needing lender-accepted reports for projects above 1 MW where bankable simulations are the primary requirement.

Read our full PVsyst review for a detailed breakdown.

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Aurora Solar — Best for Lithuanian Residential Prosumer Installers

Best For: Residential installers focused on sub-30 kW prosumer projects

Pricing: $4,800+/year (estimated)

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

What Works for Lithuania

• Industry-leading automatic 3D roof detection speeds up residential design
• Beautiful, client-facing proposals help close deals in the competitive Lithuanian prosumer market
• CRM integrations (Salesforce, HubSpot) streamline sales workflows

Where It Falls Short in Lithuania

• No integrated SLD generation — EPCs needing Litgrid/DSO electrical documentation will need AutoCAD ($2,000/year) as a separate tool
• No carport or tracker design — Limited for Lithuania’s growing commercial and ground-mount segments
• P50 only — No P75/P90 metrics, which Lithuanian banks typically expect for financed projects
• US-centric pricing — $4,800+/year is steep for Baltic market budgets

Best for: Residential installers focused on prosumer projects (5-30 kW net metering) who prioritize sales proposals over engineering depth.

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

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HelioScope — Utility-Scale Design for Lithuanian Solar Farms

Best For: Utility-scale developers designing 1-50 MW ground-mount projects

Pricing: $2,400-4,800/year

HelioScope is a cloud-based design platform focused on commercial and utility-scale solar projects. Its browser-based tools make it fast to learn and efficient for large-scale ground-mount work.

What Works for Lithuania

• Fast ground-mount design optimized for multi-MW solar farm projects
• Integrated simulation with credible production estimates
• Supports international locations, including Lithuanian weather data via PVGIS
• Team collaboration through cloud-based project sharing

Where It Falls Short in Lithuania

• No SLD generation — Like Aurora, projects requiring Litgrid/DSO electrical documentation need external tools
• Limited residential features — Not optimized for the high-volume prosumer segment
• US-centric — EU compliance features require manual adaptation

Best for: Utility-scale developers designing 1-50 MW ground-mount projects in Lithuania who prioritize speed over electrical engineering depth.

See our full HelioScope review for more details.

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PV*SOL — German Precision for Baltic Climate Modeling

Best For: Technical engineers needing detailed cold-climate simulation

Pricing: EUR 990-1,990/year (Premium edition)

PV*SOL is a German-developed simulation and design tool from Valentin Software with strong presence across the Baltic and Nordic markets. Its cold-climate modeling capabilities make it particularly relevant for Lithuanian conditions.

What Works for Lithuania

• Excellent low-light and cold-weather performance modeling — built for Baltic/Nordic climates
• Snow load integration compliant with Eurocode standards used in Lithuanian STR codes
• Detailed 3D visualization with shading analysis for low sun angles (54-56 degrees N)
• Battery storage modeling — relevant as Lithuanian storage market grows

Where It Falls Short in Lithuania

• No SLD generation — Electrical documentation requires external tools
• Steeper learning curve — Engineering-focused interface, 3-4 weeks to proficiency
• Limited proposal features — Technical reports rather than client-facing sales documents
• Desktop + cloud versions — Dual licensing model can be confusing

Best for: Lithuanian engineers and consultants needing detailed technical analysis and cold-climate optimization, especially for complex shading scenarios.

Read our full PV*SOL review for a detailed analysis.

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Comprehensive Comparison: All Features

Feature	SurgePV	PVsyst	Aurora Solar	HelioScope	PV*SOL
Best for	All segments	Bankability	Residential	Utility-scale	Technical sim
SLD generation	Yes (automated)	No	No	No	No
P50/P90 reports	Yes	Yes (gold standard)	P50 only	Limited	Limited
Carport design	Yes (only platform)	No	No	No	No
Tracker support	Yes	Simulation only	No	Limited	Limited
Proposal generation	Yes	No	Yes	Basic	Limited
Cloud-based	Yes	No (desktop)	Yes	Yes	Desktop + cloud
Wire sizing	Yes (automated)	No	No	No	No
Cold climate modeling	Yes	Yes	Basic	Basic	Yes (excellent)
Pricing/year	$1,899 (3 users)	$1,040-1,600	$4,800+	$2,400-4,800	$990-1,990
Onboarding	2-3 weeks	4-6 weeks	4-6 weeks	2-3 weeks	3-4 weeks

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What Lithuanian Solar Installers Actually Need From Design Software

Litgrid/DSO Grid Connection Compliance

Every solar installation in Lithuania connects through Litgrid (the TSO) or a regional DSO. Grid connection applications require technical documentation — including single line diagrams, protection schemes, and inverter specifications based on EU Network Code RfG. Software that generates SLDs automatically — like SurgePV — saves 2-3 hours per project compared to manual AutoCAD drafting. Connection timelines run 30-90 days even for small systems, so getting documentation right the first time matters.

Bankability for Lithuanian Lenders

Lithuanian banks — including SEB, Swedbank, and Luminor — expect P50/P90 production estimates for financing approvals on commercial projects above 500 kW. PVsyst is universally accepted. SurgePV’s simulations achieve +/-3% accuracy compared to PVsyst, and are increasingly accepted by Baltic lenders.

Baltic Climate Optimization — The 10:1 Challenge

Lithuania’s GHI ranges from 1,000-1,100 kWh/m2/year — roughly half of what southern European markets receive. Summer months produce 160-180 kWh/m2 while winter drops to 60-90 kWh/m2. That 10:1 seasonal ratio makes accurate shading analysis and low-light modeling essential, not optional. Your solar simulation software must handle this extreme variability to produce credible production estimates.

STR Construction Code Compliance

Rooftop installations must comply with Lithuanian STR structural requirements — including snow load calculations (1.0-1.5 kN/m2) and wind load analysis (Vref 22-26 m/s depending on location). Design software should produce accurate bill of materials with load specifications for structural engineer approval.

Prosumer Net Metering Optimization

Lithuania’s prosumer scheme provides net metering for systems up to 500 kW with annual settlement. Self-consumption optimization is critical because electricity prices fluctuate between 0.08-0.18 EUR/kWh. Your solar proposal software should model self-consumption versus export ratios accurately and help size systems to maximize savings within prosumer thresholds.

Electrical Engineering and EN 62446 Documentation

Lithuanian installations require EN 62446-compliant PV system documentation and IEC 60364-compliant electrical designs. Software that generates code-compliant SLDs, wire sizing, and protection device specifications saves hours of manual engineering work per project. This is especially important as Lithuania’s market scales and competition for qualified electrical engineers intensifies.

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Which Software Is Right for Your Use Case?

Choosing solar design software depends on your business model, project types, and team size. Here’s a decision framework:

Your Use Case	Best Software	Why	Alternative
Multi-segment EPC (residential + commercial + utility)	SurgePV	End-to-end platform covers all project types, automated SLD generation, P50/P90 bankability, proposals — no tool-switching	PVsyst + AutoCAD (higher cost, longer workflow)
Residential-only installer (50+ projects/year)	SurgePV or Aurora	SurgePV: Complete workflow at $1,899/year. Aurora: Best-in-class proposals but $3,600-6,000/year	OpenSolar for budget-conscious teams
Commercial C&I specialist (50 kW-1 MW)	SurgePV or HelioScope	SurgePV: Automated SLDs save 2-3 hrs/project. HelioScope: Fast cloud design but requires external CAD	PVsyst + design tool of choice
Utility-scale developer (1 MW+ ground-mount)	PVCase or RatedPower	Deep terrain modeling, tracker optimization, civil engineering integration	SurgePV for mixed portfolio (utility + commercial)
Engineering firm (simulation-only, no sales)	PVsyst	Gold standard bankability, universally accepted by lenders, deepest technical simulation	SurgePV if you want design + simulation in one tool
Startup installer (under 30 projects/year)	OpenSolar or SurgePV	OpenSolar: Lower cost entry point. SurgePV: Better engineering but higher upfront cost	Free tools (PVWatts, SolarEdge Designer) + outsourced engineering
Projects requiring bank financing	PVsyst or SurgePV	P50/P90 bankability reports accepted by lenders. PVsyst = universal acceptance, SurgePV = growing acceptance	HelioScope (some lenders, not all)

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Our Testing Methodology

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

1. Litgrid compliance and Baltic applicability (30%) — EU Network Code RfG documentation, IEC 60364 electrical compliance, PVGIS weather data integration, prosumer net metering modeling
2. Ease of use for Lithuanian market (25%) — Onboarding time, interface design, time-to-first-proposal benchmarks with Lithuanian EPC teams
3. Baltic climate performance (20%) — Low irradiance modeling accuracy, seasonal production analysis, snow/wind load calculations, shading analysis for low sun angles
4. Feature depth (15%) — SLD generation, wire sizing, carport/tracker design, proposal tools, P50/P90 reports
5. Pricing value (10%) — Annual cost relative to feature set, total cost of ownership including AutoCAD dependency

Testing was conducted between November 2025 and February 2026, using real Lithuanian project data and regulatory documentation from Litgrid and PVGIS.

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Bottom Line: Best Solar Design Software for Lithuania

Lithuania’s solar market is growing fast — and the regulatory environment (Litgrid, STR codes, prosumer thresholds, EU Network Codes) makes software selection more important than in simpler markets.

Here’s how to choose:

For commercial EPCs and prosumer developers: SurgePV delivers the most complete workflow. Automated SLD generation for Litgrid compliance, P50/P90 simulations for bank financing, and integrated proposals for prosumer and commercial projects — all in one platform at $1,899/year for 3 users.

For projects requiring financing above 1 MW: PVsyst remains the bankability gold standard accepted by all Lithuanian lenders. Pair it with SurgePV or AutoCAD for the complete design workflow.

For residential prosumer installers: Aurora Solar offers the best proposal design for high-volume prosumer projects, but budget-conscious Baltic teams should weigh the $4,800+/year cost and the need for a separate $2,000/year AutoCAD license for electrical documentation.

For utility-scale developers: HelioScope delivers fast ground-mount design for multi-MW Lithuanian solar farms, though it lacks SLD generation and detailed electrical engineering.

For technical precision and cold-climate specialists: PV*SOL offers German engineering rigor and excellent Baltic climate modeling, though with a steeper learning curve and limited proposal capabilities.

The Lithuanian solar market isn’t slowing down. The EPCs winning projects today are the ones producing Litgrid-compliant documentation and bankable simulations faster than their competitors — not the ones still drafting SLDs by hand in AutoCAD. Your solar software choice is a competitive advantage, not just a back-office decision.

Want to see how SurgePV handles Lithuanian 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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When You May Not Need Advanced Solar Software

Professional solar design platforms deliver significant value — but they are not always necessary for every project or business model. Here are scenarios where simpler tools or workflows may be sufficient:

Small residential installers with outsourced engineering

If you install 20-50 residential systems per year and outsource electrical engineering to a third party, paying for full design software may not make sense. Basic tools like PVWatts or manufacturer design apps combined with an external engineering firm (500-1,000 EUR per project) can be more cost-effective than a $1,899-6,000/year software subscription.

Installers using manufacturer-provided designs

Some installers work exclusively with solar distributors who provide turnkey system designs as part of their supply agreements. If your supplier handles layout, electrical documentation, and permit drawings at no extra cost, standalone design software may be redundant.

Service and maintenance-focused companies

If your business focuses on O&M, monitoring, and system maintenance rather than new installations, full design software is overkill. Monitoring platform dashboards and basic electrical schematics are typically sufficient for service work.

Very small projects under 5 kW

For tiny residential systems (1-5 kW), manual calculations and manufacturer spec sheets often suffice. The 2-3 hours saved per project with professional software may not justify the investment if you’re only installing 10-20 micro-systems per year.

When project volume is too low

Design software ROI depends on volume. If you’re completing fewer than 20-30 projects annually, the time savings (2-3 hours per project) may not offset subscription costs. Calculate your break-even point: (annual software cost) / (hours saved per project x hourly labor cost).

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Frequently Asked Questions

What is the best solar design software in Lithuania?

SurgePV is the best overall solar design software for Lithuania in 2026. It combines design, automated SLD generation (meeting Litgrid/DSO requirements), P50/P90 bankable simulations, and proposal tools in one cloud-based platform at $1,899/year for 3 users. For simulation-only needs, PVsyst remains the bankability standard.

Is solar design software required by law in Lithuania?

Not explicitly. However, Litgrid and regional DSOs require detailed technical documentation — including single line diagrams, protection schemes, and inverter specifications — for grid connection approval under EU Network Code RfG. Design software that generates these outputs automatically streamlines the permitting process significantly.

Which solar software do Lithuanian EPCs use?

Lithuanian EPCs use a mix of tools depending on project scale. SurgePV covers all segments (prosumer, commercial, utility-scale). PVsyst is standard for bankable simulations required by Swedbank and SEB. HelioScope is popular for utility-scale design. PV*SOL has strong Baltic market presence for detailed technical simulation.

What software do Lithuanian banks accept for solar financing?

Lithuanian banks (Swedbank, SEB, Luminor, DNB) accept PVsyst reports as the gold standard, plus other tools with +/-3-5% accuracy and IEC 61853 compliance (including SurgePV and HelioScope) for projects above 500 kW. P50 is the minimum requirement; P75/P90 is expected for projects above 1 MW.

How much does solar design software cost in Lithuania?

Costs range from EUR 990/year (PV*SOL basic) to over $6,800/year (Aurora Solar plus AutoCAD). SurgePV starts at $1,899/year for 3 users with all features included. Aurora Solar costs $4,800+/year. Consider total cost of ownership — tools without SLD generation often require an additional $2,000/year AutoCAD license.

Does solar software support Litgrid grid code requirements?

Yes — tools with automated SLD generation produce the electrical documentation Litgrid and DSOs require. SurgePV generates permit-ready SLDs in 5-10 minutes. Lithuania follows EU Network Code RfG, requiring anti-islanding, power factor control (minimum 0.95), and voltage ride-through documentation.

Can solar software handle Lithuania’s low irradiance and seasonal extremes?

Yes, professional solar software (SurgePV, PVsyst, PV*SOL) uses PVGIS weather data for Lithuania (1,000-1,100 kWh/m2/year GHI) and accurately models extreme seasonality (10:1 summer/winter production ratio). SurgePV’s 8760-hour shading analysis and PVGIS integration ensure accurate performance modeling for Baltic conditions.

How does net metering work with Lithuanian solar design software?

Lithuania allows prosumers (under 500 kW) to use net metering with annual settlement. Solar design software must model self-consumption ratios, grid export compensation, and volatile electricity prices (0.08-0.18 EUR/kWh) to accurately calculate ROI. SurgePV includes Lithuanian prosumer modeling with EUR-based financial calculations.

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Sources

• SolarPower Europe EU Market Outlook 2024-2028 — Market data and growth projections
• Litgrid (Lithuanian TSO) — Grid connection guidelines and technical requirements
• PVGIS (Photovoltaic Geographical Information System) — Lithuanian solar irradiance data (54-56 degrees N)
• ENTSO-E European Grid Codes — EU Network Code RfG requirements
• Lithuanian Ministry of Energy — National Energy Independence Strategy and renewable targets
• IEC Standards — IEC 60364, IEC 61853, EN 62446 (accessed February 2026)
• G2 Reviews — Verified user reviews for solar design platforms
• SurgePV Product Documentation — Official feature specifications (accessed February 2026)