The Netherlands has the highest solar capacity per capita in Europe and a grid that can no longer absorb it. Netcongestie, grid congestion, has become the defining constraint on Dutch commercial solar: in large parts of the country a new connection or a capacity increase sits in a queue measured in years. That changes what a design tool is for. The question is no longer how many panels fit on the roof, it is how much value can be extracted from a connection capacity that is already fixed.
Direct answer. The best solar design software in the Netherlands for most installers is SurgePV or PVsyst depending on project scale, because the design problem is optimising generation against a capped grid connection rather than maximising array size. Both let you model curtailment and export limits explicitly. Dutch electrical work is governed by NEN 1010, which no international platform templates natively.
TL;DR
- Netcongestie is the number one design constraint. Many commercial connections are capped or queued, and the design has to work within that.
- The salderingsregeling, net metering, is being phased out, which fundamentally changes residential economics toward self-consumption and batteries.
- Suppliers now levy terugleverkosten, feed-in charges, on households that export heavily. Export is becoming a cost, not just a lower-value revenue.
- NEN 1010 governs electrical installations. Buy a tool with editable CAD output so a Dutch designer can correct references.
- Curtailment modelling matters. An array behind a capped connection needs hourly modelling to size sensibly.
What the Netherlands Actually Changes About Solar Design Software
Grid congestion is the design brief. Dutch distribution operators, principally Liander, Stedin, and Enexis, publish congestion maps showing where transport capacity for feed-in is unavailable. In congested areas a commercial customer may be unable to obtain a new or larger connection for years. The design response is to build within the existing connection capacity, which means modelling how much of the array output can actually be delivered rather than how much it can generate.
Net metering is ending. The salderingsregeling has allowed Dutch households to net exported against imported energy at full retail value, which made oversized residential arrays extremely attractive. Its phase-out removes that, and the residential design logic shifts to matching consumption and adding storage. A tool that models annual netting rather than hourly flows will produce the wrong answer under the new regime.
Feed-in charges have arrived. Dutch energy suppliers have introduced terugleverkosten, charges levied on customers who export significant volumes. That means export can carry a cost rather than merely a low value, which inverts the sizing logic that Dutch installers have used for a decade.
NEN 1010 governs. The Dutch installation standard is NEN 1010, part of the IEC 60364 family. No international design platform emits NEN 1010 references natively, so editable CAD output is what makes the correction cheap.
Curtailment and clipping are design variables. Where a connection is capped, deliberately undersizing the inverter relative to the array, accepting some clipping, can be the right economic answer. That requires hourly modelling of generation against the cap, which rules out simplified tools.
The Platforms Ranked for the Netherlands
| Platform | Best for | Export cap and curtailment modelling | Editable CAD output | Price per seat per year |
|---|---|---|---|---|
| SurgePV | Commercial layouts, SLD, and proposal | Yes, 8,760-hour | DXF and DWG | $1,299 to $1,899 |
| PVsyst | Financed and larger commercial | Best in class | No | ~$500 |
| HelioScope | Fast commercial rooftop layouts | Yes | DXF only | ~$1,188 |
| Zonnefabriek and Dutch-market tools | Domestic workflow | Basic | Limited | Subscription, EUR |
| OpenSolar | Low-volume domestic | Basic | No | $0 plus transaction fees |
| Aurora Solar | Larger commercial-facing teams | Configurable | Limited | $1,908 to $3,108 |
| AutoCAD | Final drawing sets to Dutch conventions | Not applicable | Native | ~$2,030 |
SurgePV suits the Dutch commercial segment because it models 8,760 hours against an export cap, produces the string design and single-line diagram, and exports editable DWG for NEN 1010 correction.
PVsyst is the tool for financed projects and for rigorous curtailment analysis, and it remains what Dutch lenders expect. See PVsyst price and PVsyst alternatives.
HelioScope is the fastest commercial layout engine and handles export limits. See HelioScope pricing.
Try the software behind this guide
Size the array to the connection you can actually get
SurgePV models 8,760 hours of generation against an export cap, sizes strings and inverters for deliberate clipping, and exports editable AutoCAD DWG for NEN 1010 correction.
Book a free SurgePV demo →No credit card. 20-minute walkthrough on one of your own projects.
What a Dutch Design Package Has to Contain
- Layout with module positions, orientation, and attachment method for the roof type.
- Single-line diagram to NEN 1010 conventions, with protection, isolation, and metering.
- Connection capacity analysis showing the existing or obtainable connection and the array output against it.
- Curtailment estimate, hourly, quantifying energy lost to the export cap.
- Inverter sizing rationale, including any deliberate DC to AC ratio above unity and the clipping it implies.
- Structural assessment for the roof, which on Dutch industrial buildings frequently governs whether the project is viable at all.
- Netbeheerder application to the relevant distribution operator.
Item 5 deserves attention. Where the connection is the binding constraint, raising the DC to AC ratio and accepting clipping can increase delivered energy per euro of connection capacity. That is a calculation, and it needs hourly data.
Pricing in Euro
| Stack | Annual cost | Covers |
|---|---|---|
| OpenSolar | €0 plus fees | Basic domestic design |
| PVsyst | ~€460 | Yield and curtailment modelling |
| HelioScope | ~€1,093 | Commercial layout and yield |
| SurgePV | ~€1,195 to €1,747 | Layout, SLD, DWG, proposal |
| Aurora | ~€1,755 to €2,859 | Proposal-led stack |
Dollar-quoted figures converted at an illustrative 0.92.
What Most Dutch Installers Get Wrong
They still design for maximum roof fill.
That was correct when the salderingsregeling paid retail value for every exported unit and grid capacity was available. It is no longer correct. With net metering ending, feed-in charges appearing, and congestion capping connections, the array that maximises generation is frequently not the array that maximises value. The right Dutch design in 2026 is often smaller, better matched to on-site load, and paired with storage or flexible load rather than sized to the rafters.
The second mistake is treating congestion as a paperwork problem to solve after design. In congested areas the available connection capacity is the first input to the design, not a downstream approval.
When Software Is Not the Answer
Dutch industrial rooftops are frequently the constraint rather than the electrical design. Many older warehouse and greenhouse structures cannot carry a conventional array without strengthening, and establishing that requires structural assessment rather than software.
That is what our solar civil and structural engineering team produces, with calculation packages via STAAD Pro report calculations, alongside solar rooftop detailed engineering design for the full construction pack. See the sample design pack or talk to our team.
Conclusion
- Start from the connection capacity, not the roof area. In congested regions that is the binding constraint and everything else follows from it.
- Model curtailment hourly. Deliberate clipping can be the right answer behind a capped connection, but only a calculation shows it.
- Design for self-consumption. With net metering ending and feed-in charges arriving, exported energy is worth less every year.
In this country series: solar software in the Netherlands, best solar proposal software in the Netherlands, shading analysis software in the Netherlands, Pvcase review. Tool deep dives: Pvsyst review, Helioscope review.
More from our network
Disclosure and accuracy note
Commercial relationship. Heaven Designs and SurgePV are part of the same group. Treat our recommendation of SurgePV as a vendor making its own case, not an independent verdict. We have tried to describe every other product fairly, and to say plainly where a competitor is the better choice.
Pricing. All prices are indicative, compiled from public sources when this page was written. They vary by tier, region, contract term and exchange rate, and change without notice. Several vendors quote rather than publish, and some price in currencies other than the US dollar, so a converted figure moves with the exchange rate. Confirm current pricing with the vendor before you decide anything.
Trademarks and corrections. All product names and trademarks belong to their respective owners, and are used here for identification and comparison only. Their use does not imply affiliation with or endorsement by those companies. If anything here is out of date or wrong, tell us and we will correct it.
FAQ
What is the best solar design software in the Netherlands? SurgePV for commercial layouts, single-line diagrams, and editable DWG, or PVsyst where the project is financed or needs rigorous curtailment analysis. Both model generation against an export cap, which is the core Dutch design problem.
How does netcongestie affect solar design? In congested areas, distribution operators cannot offer new or increased feed-in capacity, sometimes for years. The array has to be designed against the connection capacity actually available, which usually means a smaller system with higher self-consumption.
What happens as the salderingsregeling ends? Residential economics shift from netting exported against imported energy at retail value to self-consumption plus a lower export value. Oversized residential arrays lose much of their case, and storage becomes more attractive.
What are terugleverkosten? Charges some Dutch suppliers levy on customers who export significant volumes. They mean export can carry a cost rather than simply a lower value, which further favours self-consumption.
Does any software support NEN 1010 natively? No mainstream international platform does. Choose a tool with editable CAD output so a Dutch designer can correct references and conductor tables before submission.
How much does solar design software cost in the Netherlands? From €0 with OpenSolar to roughly €2,900 per user per year for a proposal-led stack. Full math is in our solar design software pricing breakdown.
What about proposal software specifically? Covered in best solar proposal software in the Netherlands.
What about shading analysis specifically? Shading is a separate tool decision at the Netherlands’s latitude and approval regime. Covered in best solar shading analysis software in the Netherlands.
