Best Solar Design Software Ireland: 2026 Guide

Irish solar has an unusual quirk that most design software ignores: the export rate depends on which supplier the customer happens to be with, and the standard range runs from 15.2 to 32.0 cents per kWh. That is roughly a two-to-one spread on the same exported kilowatt-hour. On an export-heavy system, moving a customer to a better Clean Export Guarantee tariff can be worth more than adding panels. Layer on an SEAI grant that tapers and stops at 4 kWp, an NC6 notification that must be filed 20 working days before installation, and planning exemptions that vanish inside Architectural Conservation Areas, and Ireland rewards a design tool that models the specifics. This guide compares the platforms Irish installers should shortlist.

Short version. The best solar design software for Irish installers in 2026 is SurgePV, because the Clean Export Guarantee spread of 15.2 to 32.0 cents per kWh means the customer’s actual supplier tariff has to be modelled rather than averaged, and SurgePV runs 8,760-hour simulation to split self-consumption from export properly. OpenSolar is free at entry and widely used in Irish residential. PV*SOL is credible on simulation but desktop-bound.

Ireland is a small, fast-growing residential market with a well-informed customer base and a genuinely generous export regime by European standards. The complication is variability rather than complexity. For the broader category comparison see our solar design software buyer’s guide and the best solar design software ranking.

The Grant Taper Shapes The System Size

The SEAI residential grant is not a flat rate and the structure has a direct effect on the sizing conversation.

The marginal grant drops from 700 to 200 euros per kWp after the second kilowatt, and to zero after the fourth. In effective-cost terms the first 2 kWp are heavily subsidised, the next 2 lightly, and everything beyond that is fully customer-funded.

That does not mean systems should stop at 4 kWp. It means the proposal should show the effective cost per kWp changing across the system, so the customer understands why the fifth kilowatt costs more than the first. A quote showing one blended price per kWp hides the structure and makes the larger system look worse than it is once export income is included.

The Export Rate Is A Variable, Not A Constant

On a household exporting 2,500 kWh a year, the difference between a 15.2 cent tariff and a 25.0 cent one is roughly 245 euros annually. Over a typical system life that comfortably exceeds the cost of several additional panels. Advising the customer to review their CEG supplier is therefore a legitimate part of the proposal, and it costs the installer nothing.

Two further details belong in the numbers. The first 400 euros of annual export income is tax-exempt through the end of 2028, so gross export revenue is not net benefit above that line. And because avoided import is worth more than any CEG rate, self-consumption still dominates, which means the hourly split between consumed and exported energy matters as much here as anywhere. Our PV yield simulation software guide covers the modelling, and solar plus storage design software covers the battery case, which is weaker in Ireland than in low-export markets precisely because CEG rates are relatively good.

Connection, Planning And Standards

NC6 versus NC7. NC6 is notification for single-phase under 6 kW (25A) or three-phase under 11 kW (16A per phase), and the form must reach ESB Networks at least 20 working days before installation starts. NC7 is a mini-generation application for single-phase 6 to 50 kW or three-phase 11 to 50 kW. The threshold changes both the process and the lead time, so a design that drifts across it changes the project timeline. SurgePV’s Ireland compliance library covers the process.

Planning. S.I. 493/2022 exempts most residential work: rooftop projection up to 15 cm on pitched roofs or 50 cm on flat, and ground-mounted arrays up to 25 square metres, 2 metres high, 2 metres from boundaries. Protected Structures and Architectural Conservation Areas are the exception and need full planning permission, which is a substantial timeline addition that should surface at survey rather than after.

Standards and contractors. EN 50549 governs grid connection protection. Part L of the 2022 building regulations applies. Contractors must be RECI-registered. The Commission for Regulation of Utilities regulates export. SEAI grant eligibility has its own registration requirements, covered in SurgePV’s SEAI grants guide.

Irish irradiance. Low winter sun angles and high cloud cover mean generation is concentrated into a short summer season with significant diffuse-light contribution. A yield model tuned for southern Europe will misstate both the annual figure and its seasonal distribution, which matters for a self-consumption calculation.

The Six Platforms Irish Installers Should Evaluate

1. SurgePV, the all-in-one pick

Configurable export tariffs so the customer’s actual CEG rate can be modelled, 8,760-hour module-level simulation, AI 3D roof modeling from satellite, bankable P50, P75, P90, and white-label proposals with e-signature. $1,299 to $1,899 per user per year.

2. OpenSolar

Free at entry and widely used in Irish residential, with a clean customer document. Simplified shading is the constraint, and it matters more than it looks given Irish diffuse-light conditions. Our OpenSolar alternative breakdown covers the limits.

3. PV*SOL

Strong European simulation with good self-consumption modelling. Windows desktop with a thin proposal layer. See our PV*SOL alternative comparison.

4. Easy PV

Popular with installers across Ireland and the UK for quick residential layouts and certification-oriented documentation. Lighter simulation depth, so commercial work generally needs a second tool.

5. Aurora Solar

Deep residential design built for US structures, with no SEAI grant taper, no CEG library and no NC6 or NC7 workflow. Difficult to justify at Irish residential ticket sizes. See our Aurora Solar alternative comparison.

6. Spreadsheet plus a design tool

Common among smaller Irish installers. Flexible, and the usual source of a single national CEG rate persisting in circulating quotes.

Ireland Solar Design Software Comparison

Worked Example: 5 kWp In Cork, Two Different CEG Suppliers

An illustrative calculation, not a specific customer project. Inputs: 5 kWp, 900 kWh per kWp specific yield, 4,500 kWh generation, 4,200 kWh consumption, import at 33 cents per kWh, self-consumption 38%, SEAI grant 1,800 euros.

The supplier choice is worth 274 euros a year on an identical system, which is roughly the value of adding a kilowatt of panels without the capital cost. It also pushes the customer past the 400 euro tax exemption, which the proposal should note rather than ignore. This is the single easiest recommendation an Irish installer can make, and it only appears if the tool models the actual tariff rather than a national average.

Who Should Choose What

• Choose SurgePV if you want supplier-specific CEG modelling, the SEAI taper shown properly, and proposals from one license.
• Choose OpenSolar for simple residential where entry cost decides, accepting simplified shading.
• Choose PV*SOL if your work is engineering-led and someone else builds the customer document.
• Choose Easy PV if documentation speed on straightforward residential is the constraint.
• Avoid Aurora at Irish residential ticket sizes. No SEAI, no CEG, no NC6 workflow.

The Bottom Line

Ireland is a market where two variables the installer does not control, the customer’s supplier and their conservation-area status, can each move the project more than any design decision.

• Model the customer’s actual CEG tariff. A 15.2 to 32.0 cent spread makes a national average wrong for nearly everyone.
• Show the grant taper, not a blended price. The first 2 kWp are heavily subsidised and everything past 4 kWp is not, and customers should see why.