Public technical assistant

Solar PV Assistant

Evidence-grounded help for preliminary Solar PV sizing, component compatibility, site questions and feasibility arithmetic for Irish rooftop and ground-mounted projects.

No account is required. Estimates are preliminary, source-dependent and not a binding quote. Site survey, electrical checks and professional engineering confirmation are still required.

Ask for a preliminary design check

The assistant is designed to separate verified source facts, user-supplied assumptions and deterministic calculations. It should ask for missing values rather than inventing product specifications, prices, roof dimensions or grant amounts.

PRELIMINARY TECHNICAL COST ESTIMATE

BOM and feasibility outputs must stay labelled this way until survey, engineering validation and current source review are complete.

Catalogue structure

These sections define the public browsing structure. Detailed models, tables, prices and page citations will be populated only from source-reviewed product data.

PV modulesModule power, dimensions, temperature coefficients and source pages.

InvertersMPPT windows, DC voltage/current limits and compatible string checks.

MountingRooftop and ground-mounted options with assumptions and exclusions.

BOS / protectionDC protection, AC protection, cables, connectors and monitoring.

Equipment used in preliminary calculations

Technical data and dated cost assumptions from the same dataset used by the assistant. These are not current stock, a current offer or a final installation design.

Trina Vertex S+ TSM-445NEG9R.28 (445 W, dual glass, n-type i-TOPCon)

Recorded technical specifications
Current at maximum power	10.05 A
Short-circuit current	10.71 A
Module area	1.9981 m²
Efficiency	22.3 %
Module power	445 W
Voltage at maximum power	44.3 V
Voc temperature coefficient	-0.24 %/°C
Open-circuit voltage (Voc)	52.6 V

Preliminary unit cost basis: EUR 73.0–152.76. Price recorded 2026-10-11.

Lower bound: dated Irish equipment-only retail observation, excluding VAT. Upper bound: derived study supply-role allowance, not an Irish quote for this exact model. Study335W module EUR115 /335W ×445W, rounded to EUR152.76 per module; it is not an observed TSM-445NEG9R.28 installation-contract price.

Derived upper allowance source: Technical-Economic Feasibility Study — Irish Residential Market (v6, September 2026), p. 3

Listed sold out / back order on 2026-10-11, ships from the Netherlands warehouse. The listed price is the fact used here; availability is not a claim this design makes.

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Trina Vertex S+ TSM-440NEG9RC.27 (440 W front-side, bifacial dual glass)

Recorded technical specifications
Current at maximum power	10.01 A
Short-circuit current	10.67 A
Module area	1.9981 m²
Efficiency	22 %
Module power	440 W
Voltage at maximum power	44 V
Voc temperature coefficient	-0.24 %/°C
Open-circuit voltage (Voc)	52.2 V

Preliminary unit cost basis: EUR 80. Price recorded 2026-10-20.

Recorded equipment-only retail price EUR 80 excluding VAT; EUR 98.40 including VAT. Installation and delivery excluded. Listed unavailable; no stock or availability promise.

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Solis S6-GR1P5K-DC (5 kW, single phase, 2 MPPT, with DC isolator)

Recorded technical specifications
AC power	5 kW
Maximum DC voltage	550 V
Maximum input current	16 A
Maximum input strings	2
Maximum short-circuit current	22 A
MPPT trackers	2
MPPT maximum voltage	550 V
MPPT minimum voltage	90 V
Recommended maximum PV power	7.5 kW

Preliminary unit cost basis: EUR 526.52–2100.0. Price recorded 2026-10-11.

Lower bound: dated Irish equipment-only retail observation, excluding VAT. Upper bound: derived study supply-role allowance, not an Irish quote for this exact model. Study4kW premium hybrid inverter EUR1680 /4kW ×5kW =EUR2100; this is not an observed price of the Solis grid-tie model.

Derived upper allowance source: Technical-Economic Feasibility Study — Irish Residential Market (v6, September 2026), p. 3

Listed sold out / to order on 2026-10-11, ships from the Netherlands warehouse.

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Solis S6-EH1P5K-L-PLUS (5 kW hybrid, 16 A MPPT variant)

Recorded technical specifications
AC power	5 kW
Maximum DC voltage	500 V
MPPT minimum voltage	90 V
MPPT maximum voltage	435 V
Maximum input current	16 A
Maximum short-circuit current	20 A
MPPT trackers	2
Maximum input strings	2
Recommended maximum PV power	8 kW

Preliminary unit cost basis: EUR 926.96. Price recorded 2026-10-19.

Recorded equipment-only price excluding VAT, installation and delivery. No stock promise.

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Fronius Primo 3.0-1 Light (3 kW, single phase, 2 MPPT; SKU 4.210.069.001)

Recorded technical specifications
AC power	3 kW
Maximum DC voltage	1000 V
MPPT minimum voltage	200 V
MPPT maximum voltage	800 V
Maximum input current	12 A
Maximum short-circuit current	24 A
Manufacturer Isc sizing multiplier	1.25 ×
MPPT trackers	2
Maximum input strings	4
Recommended maximum PV power	4.5 kW

Preliminary unit cost basis: EUR 978.42–1203.46. Price recorded 2026-10-20.

Equipment-only Irish retail price range spans explicitly labelled excluding/inclusive VAT amounts, not installer quotations; delivery and installation excluded. Confirm applicable domestic PV VAT treatment. Availability not guaranteed.

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Fronius Primo 6.0-1 Light (6 kW, single phase, 2 MPPT; SKU 4.210.062.001)

Recorded technical specifications
AC power	6 kW
Maximum DC voltage	1000 V
MPPT minimum voltage	240 V
MPPT maximum voltage	800 V
Maximum input current	18 A
Maximum short-circuit current	36 A
Manufacturer Isc sizing multiplier	1.25 ×
MPPT trackers	2
Maximum input strings	4
Recommended maximum PV power	9.0 kW

Preliminary unit cost basis: EUR 1462.38–1798.73. Price recorded 2026-10-20.

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Workflow

The public assistant should collect only the project facts needed for a technical answer. It is not a sales funnel and does not request contact details.

Project inputs

Source-backed product facts

Deterministic sizing

Compatibility and BOM

Feasibility output

Project inputs for preliminary checks

You can give the assistant structured facts in plain English. The current runtime stores these facts for the session. After collecting the roof or ground inputs, it shows an area-based capacity limit and asks which system size you want before running a deterministic preliminary-design attempt. When required project inputs or operational product data are unavailable, it will return blockers instead of inventing module, inverter, BOM, price or compatibility assumptions.

Site and roofInstallation type, usable roof or field area, orientation, pitch and shading.

Energy targetsAnnual consumption, desired kWp, expected generation and self-consumption.

Tariff assumptionsElectricity import price and export tariff, supplied by the user or reviewed sources.

Example: “Rooftop system, usable roof area 32 m2, electricity price 0.47 EUR/kWh, export tariff 0.185 EUR/kWh.”

Site-analysis guardrails

Roof, map and satellite assessment requests are routed separately from general knowledge answers. OpenStreetMap address lookup now returns mapped location candidates and building outlines where available. Confirm the correct location before its coordinates enter your project. A mapped building footprint is not usable roof area; pitch, orientation and shading still require measured inputs. When a provider is unavailable, the assistant retains the address and asks for measured site facts.

Mapped locationOpenStreetMap may find a building, street or locality. Check the map and address before confirming.

User confirmationProvider-derived installation areas must be confirmed before calculations use them.

Manual fallbackIf provider data is unavailable, continue only with measured user-supplied site facts.

Example: “Run a roof site analysis. Address is 1 Main Street, Cork.” Review the location candidates, open their maps, then use “Confirm location” or reply “Confirm site 1”.

Historical reference product data

A separate reference dataset is available for historical catalogue examples only. It is not current stock, not a current offer and not final design data.

Sharp ND-RG250Reference PV module facts from an English candidate datasheet, page 2.

Sharp ND-RG255Reference PV module facts from an English candidate datasheet, page 2.

Fronius Symo 10–20 kW rangeHistorical catalogue range facts from page 53; not exact current model design data.

Fronius Eco 25–27 kW rangeHistorical catalogue range facts from page 55; not exact current model design data.

Runtime guardrails before operational launch

Until operational product data and prepared current sources are approved, the assistant fails closed for high-risk current claims instead of answering from historical examples or filling missing values with defaults.

Current offersCurrent stock, availability, prices, offers and quotations are blocked without approved operational product data.

Financial claimsGrants, incentives, ROI, payback, savings and annual benefit require reviewed current sources and explicit inputs.

CompliancePlanning permission, ESB/grid connection, NC6/NC7, setbacks and fire-safety claims require reviewed compliance sources.

Yield assumptionskWh generation, irradiation, weather, system losses and performance ratio require approved assumptions or user-provided values.

Current source status

Operational equipment data and prepared English sources are available. Product prices are dated observations, and the feasibility study supplies illustrative assumptions. Current stock, eligibility and site-specific design suitability still require verification.