TL;DR: SurgePV is the best all-in-one solar design platform for Belgian EPCs and installers in 2026, offering integrated electrical engineering (automated SLDs, wire sizing), bankable P50/P75/P90 simulations, and proposals — all without AutoCAD. PVsyst remains the gold standard for bank validation. Aurora Solar suits high-volume Flemish residential operations but requires an expensive AutoCAD add-on for DSO approvals.
Belgium is targeting 12-14 GW by 2030, according to Elia and APERe. Massive growth. But designing solar systems here is a different challenge entirely.
Three regions. Three completely different regulatory systems. Flanders charges a prosumer tariff of EUR 57.91 per kW. Wallonia offers green certificates worth EUR 85-95 each. Brussels still has net metering — but that window closes in 2027-2028.
Most solar software platforms were never built for this kind of complexity. No native electrical engineering for Fluvius, ORES, or Sibelga DSO grid approvals. No P50/P75/P90 bankable reports that Belgian banks like KBC and BNP Paribas Fortis actually accept. AutoCAD, PVsyst, Excel — three tools minimum just to get one commercial project out the door.
We tested and compared 5 solar simulation software platforms specifically for the Belgian market, evaluating each on DSO compliance, regional regulatory support, shading accuracy, bankability, and workflow efficiency.
In this guide, you’ll learn:
- Which platform handles Fluvius/ORES/Sibelga electrical documentation best
- How pricing compares (including hidden AutoCAD costs)
- Which tool delivers bankable simulations accepted by Belgian financiers
- Our recommendation based on 500+ commercial projects across Europe
Quick Comparison: Top 5 Solar Design Tools for Belgium
| Software | Best For | SLD Generation | P50/P75/P90 | Cloud | Pricing (EUR/year) |
|---|---|---|---|---|---|
| SurgePV | End-to-end workflows | Yes (automated) | Yes | Yes | ~EUR 1,200-1,760/user |
| PVsyst | Validation/bankability | No | Yes | No (desktop) | ~EUR 1,150 one-time |
| Aurora Solar | Flemish residential | No (needs AutoCAD) | P50 only | Yes | EUR 3,565+/user |
| OpenSolar | Budget residential | No | P50 only | Yes | EUR 900-1,685 |
| HelioScope | Large commercial | No (needs AutoCAD) | Yes | Yes | EUR 1,800-3,000 |
Pro Tip
The “true cost” of Aurora Solar in Belgium includes a mandatory AutoCAD license (EUR 1,800/year) for electrical documentation. Factor that into every comparison.
Why Most Belgian Solar Companies Overpay for Design Software
Belgium is not just one market. It is three.
Software that works for a Flemish residential installer may be completely wrong for a Walloon commercial EPC. And Brussels operates under yet another set of rules.
Three regulatory systems, one country
Flanders ended net metering in 2020. Now every new installation faces a prosumer tariff (EUR 57.91/kW inverter capacity through VREG). Self-consumption optimization is the difference between a 9-year payback and a 14-year payback.
Wallonia offers green certificates worth approximately EUR 85-95 each through CWaPE. For commercial projects above 10 kWp, that adds EUR 200-240 per MWh in revenue over 10 years. Your design software needs to model this accurately.
Brussels still has net metering (1:1 compensation) through Brugel, plus green certificates worth EUR 90-100 each. With net metering ending in 2027-2028, every proposal needs scenario analysis showing what happens after the transition.
DSO grid approvals demand electrical documentation
Fluvius (Flanders), ORES (Wallonia), and Sibelga (Brussels) all require IEC 61727-compliant electrical documentation for grid connection. That means Single Line Diagrams, wire sizing calculations, and protection system specifications.
Without automated SLD generation, your team spends 2-3 hours per commercial project drafting in AutoCAD. With it, that drops to 5-10 minutes.
Belgian banks require bankable simulations
KBC, BNP Paribas Fortis, and Belfius do not accept basic P50 estimates for commercial project financing. They want conservative P75 or P90 metrics — preferably from PVsyst or an equivalent IEC-compliant simulation engine. As SolarPower Europe notes, bankability requirements across European markets are tightening, and Belgium is no exception.
Belgian DSO grid approval workflow:
| Step | Task | Time with SurgePV | Time with AutoCAD |
|---|---|---|---|
| 1 | System Design | Included | Separate |
| 2 | SLD + Wire Sizing | 5-10 min | 2-3 hrs |
| 3 | DSO Application | Streamlined | Manual |
| 4 | Grid Approval | Faster | Standard |
Best Solar Design Software in Belgium
SurgePV — Best End-to-End Solar Design Platform for Belgium
SurgePV is a cloud-based solar design software that combines design, electrical engineering, simulation, and proposal generation in a single workflow.
For Belgian EPCs, the standout feature is integrated electrical engineering. You get automated SLD generation and wire sizing calculations that produce IEC 61727-compliant documentation for Fluvius, ORES, and Sibelga grid approvals — without touching AutoCAD.
A 50 kW commercial rooftop that used to take 3 hours (Aurora design + AutoCAD electrical) now takes 45 minutes. Everything stays in one platform.
Key Features for Belgium
Design and engineering:
- Automated SLD generation — IEC 61727-compliant electrical documentation in 5-10 minutes (vs. 2-3 hours manual AutoCAD)
- Wire sizing calculations — DC/AC sizing with voltage drop analysis, meeting Belgian RGIE standards. Zero risk of undersized cables failing inspection.
- AI roof modeling — Accurate detection for Belgian urban rooftops (Brussels terraced houses, Flemish steep-pitch roofs, Walloon industrial warehouses)
Simulation and bankability:
- P50/P75/P90 production estimates — Conservative P75 metrics accepted by Belgian banks (KBC, BNP Paribas Fortis, Belfius). Your financing applications include the bankability data lenders actually require — not just optimistic P50 estimates.
- 8760-hour shading analysis — +/-3% accuracy vs. PVsyst, for dense Belgian urban environments
- Self-consumption optimization — Financial modeling supports Flanders prosumer tariff and Wallonia compensating tariff analysis. In Flanders, getting self-consumption right is the difference between a 9-year and 14-year payback for your customer.
Commercial structures:
- Carport solar design — Native support (only platform with this feature), relevant for Belgian commercial parking lots. With Belgium’s growing commercial carport mandates, this is a competitive differentiator.
- East-West racking — Higher density installations for Belgian commercial rooftops
- Solar tracker support — Single-axis and dual-axis for emerging Belgian ground-mount projects
Pros
- Integrated electrical engineering eliminates AutoCAD dependency, saving EUR 1,800/year per user
- Bankable P50/P75/P90 metrics accepted by Belgian financiers
- Significantly faster workflows vs. Aurora+AutoCAD (45 min vs. 3+ hours for 50 kW commercial)
- Advanced shading analysis (+/-3% accuracy) for Belgian urban rooftops
- Transparent pricing (EUR 1,200-1,760/user/year) vs. Aurora+AutoCAD (EUR 3,565+/user/year)
- Only platform with native carport design
Cons
- Regional tariff modeling (Fluvius, ORES, Sibelga rates) requires manual input
- Green certificate revenue (Wallonia, Brussels) needs manual configuration
- Flanders prosumer tariff (EUR 57.91/kW) requires manual input
- Module database may not include all Belgian-specific distributor catalogs
Pricing
- Individual Plan: $1,899/year (for 3 users) = ~EUR 585/user/year
- For 3 Users Plan: $1,499/user/year = ~EUR 1,385/user/year
- For 5 Users Plan: $1,299/user/year = ~EUR 1,200/user/year
- Enterprise: Custom pricing
All features included. No tiered feature gating.
Did You Know?
Belgian EPCs using Aurora+AutoCAD spend approximately EUR 6,300 per user per year ($6,800). Switching to SurgePV at $1,499/user/year saves over $5,301 per user annually — with faster workflows and no tool-switching friction.
Real-World Example
A mid-size EPC team in Flanders 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. That is the difference automated electrical engineering makes.
SurgePV 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.
Further Reading
See our full PVsyst review for a detailed feature analysis and our Aurora Solar review for pricing and feature details.
See SurgePV’s Automated SLD Generation for Belgian Projects
End-to-end design, IEC 61727-compliant electrical engineering, and proposals — all in one cloud platform.
Book a DemoNo commitment required · 20 minutes · Live project walkthrough
PVsyst — Industry-Standard Simulation for Belgian Bankability
PVsyst is the gold-standard simulation tool universally accepted by Belgian banks for commercial project financing and green certificate approvals.
Here is the reality: PVsyst is not a design platform. It validates existing designs. You cannot create panel layouts, generate proposals, or produce electrical documentation in PVsyst.
But for large commercial projects (above 500 kW) requiring KBC or BNP Paribas Fortis financing, PVsyst reports are non-negotiable.
Key Strengths for Belgium
- Universal bank acceptance — Every major Belgian lender trusts PVsyst P50/P75/P90/P99 reports
- Belgian weather data — Stations at Uccle, Zaventem, and Deurne provide accurate local climate modeling
- Green certificate modeling — Native support for Wallonia and Brussels green certificate calculations
- Deep loss analysis — Detailed modeling for Belgium’s moderate irradiation and high cloud cover
Key Limitations
- Not a design platform (simulation and validation only)
- No electrical engineering (no SLDs, no wire sizing)
- Desktop-only — no cloud collaboration
- Steep learning curve (4-6 weeks to proficiency)
Pricing: ~CHF 1,200 (~EUR 1,150) one-time license + CHF 200-300/year maintenance.
Best for: Large Belgian commercial projects (above 500 kW) requiring bank financing or green certificate validation. Use as a validation layer alongside your primary design platform.
Aurora Solar — Best AI Roof Modeling for Flemish Residential
Aurora Solar offers the best AI-powered roof modeling in the industry. If you are a high-volume Flemish residential installer (100+ projects per year), Aurora’s 3D modeling and interactive proposals are hard to beat.
But Aurora does not include SLD generation or wire sizing. For every project that needs Fluvius, ORES, or Sibelga grid approval documentation, your team exports to AutoCAD — adding EUR 1,800/year in licensing and 2-3 hours of manual drafting per project.
Key Strengths for Belgium
- Best-in-class roof modeling — High accuracy for Belgian residential rooftops (Flemish terraced houses, pitched roofs)
- Polished proposals — Interactive, mobile-optimized proposals for Flemish homeowner sales
- Self-consumption modeling — Supports Flanders prosumer tariff analysis
- CRM integrations — Native Salesforce and HubSpot connections
Key Limitations
- No SLD generation — Requires AutoCAD (EUR 1,800/year) for Fluvius/ORES/Sibelga approvals
- No wire sizing — Manual calculations or third-party spreadsheets required
- P50 only — No P75/P90 estimates for Belgian bank financing
- No carport design — Missing emerging Belgian commercial segment
Pricing: Basic Plan: ~EUR 1,765/year. Premium Plan: ~EUR 2,875/year. Plus AutoCAD: EUR 1,800/year. Total: EUR 3,565+/user/year.
Best for: High-volume Flemish residential installers focused on homeowner proposals and sales, with a separate engineering team handling electrical documentation.
OpenSolar — Affordable Residential Platform for Small Belgian Installers
OpenSolar is the most budget-friendly option for small Flemish residential installers. With a 2-3 day learning curve and professional proposals, it is a solid starting point for teams doing fewer than 50 projects per year.
Key Strengths for Belgium
- Simple interface with fast learning curve (2-3 days)
- Affordable pricing (EUR 900-1,685/year) for small teams
- Professional proposals for Belgian homeowners
- Built-in CRM and project management
Key Limitations
- No SLD generation (manual workflows for DSO approvals)
- No wire sizing
- Limited commercial support (not suitable for projects above 50 kW)
- No P75/P90 estimates
- No green certificate modeling
Pricing: EUR 900-1,685/year.
Best for: Small Flemish residential installers (1-5 employees, under 50 projects/year) focused on homeowner proposals. Not suitable for commercial EPCs.
HelioScope — Commercial Cloud Platform for Large Belgian Projects
HelioScope (now part of Aurora Solar) targets commercial and utility-scale projects (100 kW to 10 MW). It offers cloud-based collaboration and bankable reports — suitable for large Belgian commercial EPCs working on Flanders and Wallonia industrial zones.
Key Strengths for Belgium
- Commercial and utility-scale focus (aligns with growing Belgian commercial market)
- Cloud-based team collaboration
- Bankable reports for Belgian bank financing
- Advanced shading analysis for complex rooftops
Key Limitations
- No electrical engineering (requires AutoCAD for DSO submissions)
- Aurora acquisition creates pricing uncertainty
- Not suitable for the residential market (dominant Flemish segment)
- No green certificate modeling
Pricing: EUR 1,800-3,000/year (expected post-Aurora consolidation).
Best for: Large Belgian commercial EPCs (above 100 kW projects) in industrial zones. Not ideal for residential-focused installers.
Feature Matrix: Belgium-Specific Comparison
| Feature | SurgePV | PVsyst | Aurora Solar | OpenSolar | HelioScope |
|---|---|---|---|---|---|
| SLD generation (DSO approval) | Yes (automated) | No | No (needs AutoCAD) | No | No (needs AutoCAD) |
| Wire sizing | Yes | No | No | No | No |
| P50/P75/P90 | Yes | Yes | P50 only | P50 only | Yes |
| Regional tariff modeling | Manual input | Customizable | Manual input | Manual input | Manual input |
| Green certificate support | Manual input | Yes | No | No | No |
| Cloud-based | Yes | No (desktop) | Yes | Yes | Yes |
| Carport design | Yes (native) | No | No | No | No |
| Proposal generation | Yes | No | Yes | Yes | Limited |
| Pricing (EUR/user/year) | 1,200-1,760 | ~1,150 one-time | 3,565+ | 900-1,685 | 1,800-3,000 |
3-year total cost of ownership for a Belgian EPC (3 users):
| Platform | 3-Year Cost | What’s Included |
|---|---|---|
| SurgePV | ~EUR 12,465 | All-in-one: design + engineering + proposals. No AutoCAD needed. |
| Aurora + AutoCAD | ~EUR 32,085+ | Design + proposals + AutoCAD. No engineering automation. |
| OpenSolar + AutoCAD | ~EUR 18,855 | Budget design + proposals. Manual engineering. |
| PVsyst + Design Tool | Varies by combo | Validation only. Needs separate design + proposals + engineering. |
How to Choose the Right Solar Design Software for Belgium
Not sure which platform fits your operation? Use this decision framework.
By region
- Flanders only: SurgePV (commercial) or Aurora Solar (high-volume residential)
- Wallonia only: SurgePV (green certificate modeling flexibility) or PVsyst (validation)
- Brussels only: SurgePV (net metering + green certificates + electrical documentation)
- Multi-regional: SurgePV (flexible regional input for all three systems)
By business size
- 1-5 employees: OpenSolar (EUR 900-1,685/year) or SurgePV Individual Plan (~EUR 585/user/year)
- 5-15 employees: SurgePV For 3 Users (~EUR 1,385/user/year)
- 15+ employees: SurgePV Enterprise (custom pricing)
By project type
- Residential only (under 10 kW): Aurora Solar or OpenSolar
- Commercial (50 kW-5 MW): SurgePV + PVsyst (validation for bank financing)
- Utility-scale (above 1 MW): PVsyst + HelioScope or PVCase
Pro Tip
For multi-regional Belgian EPCs managing Flanders, Wallonia, and Brussels projects, SurgePV’s cloud-based collaboration and flexible financial modeling handles three different regulatory frameworks from a single platform. See how it works.
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 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. |
Still unsure? Consider these factors:
- Monthly project volume: 10+ projects — integrated platform (SurgePV). Under 10 projects — simpler tools (OpenSolar, PV*SOL).
- Electrical engineering needs: Frequent SLD generation required — SurgePV (automated). Outsourced or infrequent — any platform + AutoCAD.
- Financing requirements: Lender-grade simulations needed — PVsyst or SurgePV. Standard residential — any platform sufficient.
- Budget constraints: Limited budget — OpenSolar (free) or PV*SOL (one-time). Growth budget — SurgePV (best ROI). Enterprise budget — Aurora Solar (premium brand).
Our Testing Methodology
Our evaluation followed Belgium-specific criteria weighted by importance for Belgian EPCs and installers:
1. DSO compliance (30% weight): Tested SLD generation and wire sizing outputs against Fluvius, ORES, and Sibelga technical regulations. Verified IEC 61727 compliance, protection system specifications, and anti-islanding requirements.
2. Regional regulatory support (25% weight): Assessed flexibility for Flanders prosumer tariff (EUR 57.91/kW), Wallonia green certificates (~EUR 85-95/certificate), and Brussels net metering (1:1 compensation). Tested self-consumption optimization and regional tariff modeling.
3. Bankability and accuracy (20% weight): Tested P50/P75/P90 production estimates against PVsyst benchmarks. Verified acceptance by Belgian banks (KBC, BNP Paribas Fortis, Belfius). Assessed shading analysis accuracy for Belgian urban environments.
4. Workflow efficiency (15% weight): Hands-on testing with Belgian EPCs across all three regions. Time-to-first-design benchmarks on a standard 50 kW commercial rooftop. Learning curve assessment (weeks to proficiency).
5. Pricing and value (10% weight): Total cost of ownership including AutoCAD dependencies. Cost vs. features for a typical Belgian EPC (3-10 employees, 50-200 projects/year). Use our Solar ROI Calculator to estimate savings for your team.
All testing conducted January-February 2026 with verified Belgian EPC teams and official DSO documentation.
When You May Not Need Advanced Software
Not every Belgian solar project requires a full-featured design platform. Small residential installers doing fewer than 10 projects per month, teams that outsource electrical engineering, or projects with simple unshaded ground-mount layouts may find free tools like OpenSolar sufficient. Advanced solar design software delivers the strongest ROI for teams handling 10+ projects per month that need bankable simulations or integrated electrical engineering.
Bottom Line: Best Solar Design Software for Belgium
For commercial EPCs across Flanders, Wallonia, and Brussels: SurgePV offers the most complete platform. Integrated electrical engineering (automated SLDs, wire sizing), bankable P50/P75/P90 simulations, and professional proposals — all in one workflow. SurgePV eliminates AutoCAD dependency (EUR 1,800/year savings per user) and reduces design time from 3 hours (Aurora+AutoCAD) to 45 minutes.
For large projects requiring bank financing: PVsyst remains the validation standard. Use PVsyst for final validation and green certificate approvals (Wallonia, Brussels), but pair it with a design platform for operational workflow.
For high-volume Flemish residential: Aurora Solar provides best-in-class roof modeling and proposals, but the AutoCAD add-on brings total cost to EUR 3,565+/user/year. OpenSolar offers a more affordable alternative for small teams.
For multi-regional Belgian operations: SurgePV’s cloud collaboration and flexible regional input (prosumer tariffs, green certificates, net metering) make it the strongest choice for teams managing projects across all three regions simultaneously.
The Belgian solar market is not slowing down. With 12-14 GW targeted by 2030 and Brussels net metering ending in 2027-2028, the installers winning projects today are the ones with accurate designs, compliant electrical documentation, and bankable simulations delivered same-day. Your solar design software choice is a competitive advantage, not just a back-office decision.
Further Reading
- PVsyst Review — Full simulation analysis and pricing
- Aurora Solar Review — Full feature and pricing deep-dive
- OpenSolar Review — Budget platform analysis
- HelioScope Review — Commercial platform assessment
Frequently Asked Questions
What is the best solar design software in Belgium?
SurgePV is the best all-in-one solar design software for Belgium in 2026. It combines design, electrical engineering (automated SLDs, wire sizing), and proposals in one platform, eliminating AutoCAD dependency and supporting Flanders, Wallonia, and Brussels regulatory requirements. For commercial EPCs (50 kW-5 MW), SurgePV’s integrated electrical engineering is essential for Fluvius, ORES, and Sibelga grid connection approvals.
PVsyst remains the validation standard for bank financing, while Aurora Solar suits Flemish residential installers.
Is solar design software required for grid connection in Belgium?
Yes. Belgian DSOs (Fluvius, ORES, Sibelga) require IEC 61727-compliant electrical documentation for grid connection approvals. This includes Single Line Diagrams, protection system specifications, and wire sizing calculations. Commercial systems (above 10 kW) universally require this documentation. Manual AutoCAD drafting takes 2-3 hours per project. SurgePV automates this in 5-10 minutes.
Which solar software do Belgian EPCs use?
Belgian EPCs commonly use PVsyst for validation/bankability, Aurora Solar for residential design, and SurgePV for end-to-end commercial workflows. Large commercial EPCs (above 500 kW) typically pair PVsyst with AutoCAD for electrical documentation. SurgePV is gaining adoption among multi-regional EPCs seeking to eliminate tool-switching friction. Explore our reviews hub for detailed analyses.
How do I model the Flanders prosumer tariff in solar software?
The Flanders prosumer tariff (EUR 57.91/kW inverter capacity through VREG) requires manual input in most software. Model it as a fixed annual cost (EUR 57.91 multiplied by inverter capacity in kW) in your financial analysis tool. SurgePV, Aurora Solar, and OpenSolar all support self-consumption analysis. Manually input the Fluvius prosumer fee as a fixed annual cost.
Can solar software calculate Wallonia green certificates?
PVsyst natively supports Wallonia green certificate modeling. SurgePV, Aurora, and OpenSolar require manual input. Calculate green certificates as additional revenue: approximately 2.5 certificates/MWh multiplied by EUR 85-95/certificate multiplied by production MWh multiplied by 10 years. Use the CWaPE green certificate calculator to estimate certificate value.
What software do Belgian banks accept for solar financing?
Belgian banks (KBC, BNP Paribas Fortis, Belfius, ING Belgium) universally accept PVsyst reports for solar financing. SurgePV and HelioScope reports are accepted case-by-case depending on project size and bank requirements. PVsyst is the gold standard for commercial financing (above 500 kW) due to IEC-compliant simulation and P50/P75/P90 metrics.
How much does solar design software cost for Belgian EPCs?
Pricing ranges from approximately EUR 900/year (OpenSolar) to EUR 3,565+/year (Aurora+AutoCAD). SurgePV costs $1,499/user/year (approximately EUR 1,385/user/year) with all features included. PVsyst is approximately EUR 1,150 one-time plus annual maintenance. Belgian EPCs should calculate total cost of ownership including AutoCAD dependencies. See detailed pricing.
Does SurgePV support Flanders, Wallonia, and Brussels regulations?
Yes. SurgePV supports multi-regional Belgian projects with flexible manual input for the Flanders prosumer tariff (EUR 57.91/kW), Wallonia green certificates (2.5 certificates/MWh), and Brussels net metering. Its IEC 61727-compliant SLD generation meets technical requirements for all Belgian DSOs (Fluvius, ORES, Sibelga). Cloud-based collaboration supports multi-regional teams.
What is Belgium’s solar energy target for 2030?
Belgium targets 12-14 GW of installed solar capacity by 2030, up from approximately 8.3 GW in 2024. This represents 45-70% growth over six years, driven by EU REPowerEU goals and Belgium’s 47% GHG reduction target vs. 1990 levels (Elia, APERe). Flanders accounts for approximately 66% of current capacity, Wallonia 26%, and Brussels 8%.
Which Belgian region offers the best solar ROI?
Brussels currently offers the best solar ROI due to active net metering (1:1 compensation) plus green certificates (3 certificates/MWh for systems under 5 kWp) plus Prime Energie subsidies (EUR 2,500-3,500). Typical Brussels payback is 6-9 years vs. 8-11 years in Flanders and 8-12 years in Wallonia (Brugel). Brussels net metering is expected to end in 2027-2028.
Sources
- SurgePV Product Documentation — Official features, pricing. https://www.surgepv.com (accessed February 2026)
- VREG (Flemish Regulator) — Prosumer tariff regulations, Fluvius technical requirements. https://www.vreg.be (accessed February 2026)
- CWaPE (Walloon Energy Commission) — Green certificate system, Wallonia PV regulations. https://www.cwape.be (accessed February 2026)
- Brugel (Brussels Regulator) — Net metering regulations, Prime Energie subsidies. https://www.brugel.brussels (accessed February 2026)
- Elia Group — Belgian TSO technical regulations, grid connection requirements. https://www.elia.be (accessed February 2026)
- APERe — Belgian renewable energy observatory, market data. https://www.apere.org (accessed February 2026)
- CREG — Belgian electricity price monitoring Q1 2025. https://www.creg.be (accessed February 2026)
- G2 Reviews — Verified user reviews for Aurora Solar, PVsyst, OpenSolar, HelioScope. https://www.g2.com (accessed February 2026)
- Eurostat — Belgium electricity price statistics 2025. https://ec.europa.eu/eurostat (accessed February 2026)
- SolarPower Europe — Belgium Solar Market Report 2025. https://www.solarpowereurope.org (accessed February 2026)
- IEA PVPS — Belgium National Survey Report 2024. https://iea-pvps.org (accessed February 2026)
Transparency
SurgePV publishes this comparison. We have applied objective criteria — DSO compliance, bankability, pricing, and workflow efficiency — and noted our own product’s limitations where they exist. All pricing data sourced from official vendor websites as of February 2026.