Battery stores surplus solar · EMS maximises self-consumption · add ~10–25% more savings
Panel costs exclude inverter (~€950–1,800) + mounting + installation (~€2,000). SEAI grant covers all solar components except battery. Apply at seai.ie before work begins.
Trina Solar · Residential Solar Panel · Ireland 2026
Trina Solar Vertex S+ 440W — Ireland 2026
Highest wattage residential panel in Ireland — fewer panels needed
At 440W, the Trina Vertex S+ is the highest-wattage standard-format residential panel widely available in Ireland. This matters on roofs with limited usable space — you can achieve a 4kWp system with fewer panels than a 430W alternative. N-type i-TOPCon technology, 22.3% efficiency, and a 15-year product warranty make this a strong all-round mid-premium choice.
440W22.3% efficiency30-yr performance warrantyN-type TOPConSEAI grant
⚙️ Specifications
Wattage
440 W
Efficiency
22.3%
Cell technology
N-type TOPCon
Dimensions
1762 × 1134 × 30 mm
Weight
21.7 kg
Temperature coefficient
−0.30%/°C
Product warranty
15 years
Performance warranty
30 years
Annual degradation
0.4%/yr
Low-light performance
Very Good
Frame
Silver
💰 Pricing & SEAI grant
☀️ This panel — Step 1 of system
~€175 per panel
You still need: inverter (~€950–1,800) · mounting · installation
Est. panel cost — 23 panels (4kWp)~€4,025
SEAI Solar PV Home Grant (max €1,800)− €1,800
Panel cost after grant~€2,225
Grant applies to the full installed system cost — panels, inverter, mounting and labour. Apply at seai.ie and receive a Letter of Offer before installation begins. Must use a SEAI-registered contractor.
Key highlights
📏
440W — fewer panels, same output
A 4kWp system needs 9–10 Vertex S+ panels instead of 10 standard 430W panels — fewer roof penetrations, tidier installation
🔬
N-type i-TOPCon
Improved TOPCon technology — no LID, lower annual degradation, and slightly better low-light performance than standard PERC
🛡️
15-year product warranty
Above the 12-year standard — Trina Solar is one of the largest panel manufacturers globally with strong warranty support infrastructure
🚗 Pair with an electric car — charge from your own solar
Solar panels and an EV are the most powerful combination for Irish homeowners. Your roof generates free electricity — your EV turns it into free kilometres. A 4kWp solar system covers approximately 30,000km of free driving per year when you charge at home. See the full EV Vehicle Directory — 205+ electric vehicles available in Ireland.
⚡ How many free kilometres does your solar system give you?
☀️ 4kWp solar/yr
3,600 kWh
generated free
🚗 Free driving
~30,000 km
in an average EV/yr
💶 vs public charging
~€1,200/yr
saved on charging
A myenergi Zappi EV charger automatically uses surplus solar before it exports — in Eco+ mode, your EV only charges when your panels are generating more than your home needs. The solar generates free electricity; the Zappi makes sure it fills your car first.
View myenergi Zappi →
Featured electric cars — most popular in Ireland 2026
440W — highest wattage standard residential panel in Ireland
Fewer panels needed for the same kWp output
N-type i-TOPCon — zero LID
15-year product warranty
Strong 22.3% efficiency
⚠️ Worth knowing
Slightly higher per-panel cost than 430W alternatives
Silver frame only — no all-black option
📐 System sizes & SEAI grant
Estimated annual generation based on Ireland's average irradiance of ~900 kWh/kWp/yr. SEAI Solar PV Home Grant applies to the first 2kWp (€900/kWp, max €1,800). Installed cost estimate includes panels, inverter, mounting and labour.
System
Panels
Est. generation
SEAI grant
3 kWp
7 panels
~2,700 kWh/yr
€1,800
4 kWp
10 panels
~3,600 kWh/yr
€1,800
5 kWp
12 panels
~4,500 kWh/yr
€1,800
6 kWp
14 panels
~5,400 kWh/yr
€1,800
⚡ Compatible inverters
The Vertex S+ 440W is compatible with the following inverters — click any to see full specs, pricing and system cost estimates. See the Solar Inverter Directory to compare all 15 inverters available in Ireland.
✅ The Vertex S+ 440W is compatible with all major Irish inverter brands. Your installer will recommend the best pairing based on your roof size, usage and budget — hybrid inverters (Huawei, Fronius, Sungrow, SolarEdge) are recommended for any home that may want battery storage now or in future.
🔧 Complete your solar system
The Vertex S+ 440W is Step 1 of a complete solar installation. Here's what you need next:
🧠 Energy Management Systems — get more from your solar
Solar panels generate electricity — an energy management system makes sure it's used at the right time and never wasted. EMS devices can reduce grid import by 10–25% beyond the panels alone, by coordinating generation, battery charging, hot water heating and EV charging. See the full Smart Energy Directory for all EMS products in Ireland.
💡 Why add an EMS to your solar system? Without an EMS, your solar system exports surplus energy to the grid at low export rates (typically €0.09–0.18/kWh via the Clean Export Guarantee). An EMS diverts that surplus to a hot water cylinder, battery, or EV charger — capturing value at your household electricity rate (€0.33–0.36/kWh) instead of the export rate.
🌡️ Pair with a heat pump — maximise your SEAI grants in Ireland
Solar panels and a heat pump are the most powerful renewable combination available to Irish homeowners today. Solar generates free electricity — a heat pump converts that electricity into heat at 3–5× efficiency. Both qualify for substantial SEAI grants. See the full Heat Pump Directory for all models available in Ireland.
💰 Combined SEAI grant opportunity — apply together
☀️ Solar PV Grant
€1,800
max residential
🌡️ Heat Pump Grant
€12,500
max (incl. bonus)
🏆 Total available
€14,600
in SEAI grants
How the heat pump grant breaks down (from 3 Feb 2026):
Heat Pump Equipment Grant (all qualifying homes)€6,500Central Heating Upgrade Grant (if radiators need work)+ €2,000Renewable Heat Bonus (switching from oil/gas/solid fuel)+ €4,000Maximum total heat pump grant€12,500EV Home Charger Grant (SEAI)+ €300Maximum total combined grant€14,600
💡 Apply BEFORE installation begins. Both the Solar PV and Heat Pump grants require a SEAI Letter of Offer before any contractor starts work. You can apply for both in the same process — ask your installer to coordinate a combined application. Also check: 9% VAT applies to heat pump supply and installation (reduced from 23% since 1 Jan 2025).
☀️ Why solar and a heat pump are the perfect pair: A heat pump runs entirely on electricity — and a solar system generates free electricity from your roof. A typical 4kWp solar system generates ~3,400–3,800 kWh/year. A heat pump for an average Irish home uses ~3,000–5,000 kWh/year for heating and hot water. With both installed, your solar covers a large portion of your heat pump's electricity use — at zero cost. The combination is the highest-savings renewable upgrade available to Irish homeowners today.
🔌 Pair with an EV charger — charge your car from your own solar
Solar panels and an EV charger are the second half of your home energy system. A smart charger draws from your panels first — turning free solar electricity directly into free kilometres. The SEAI Home Charger Grant (€300) applies on top of your solar grant.
🔌 Solar + EV charger: the complete home energy pairing
A solar-compatible smart charger like the myenergi Zappi draws directly from your panels in Eco+ mode — your car charges on electricity you generated for free before it exports to the grid. The SEAI Home Charger Grant covers €300 of your installation cost, and can be claimed alongside your solar grant in the same application.
The Vertex S+ 440W is the starting point of a complete renewable system. Most Irish homeowners install solar alongside at least one other technology — a heat pump + solar + battery combination delivers the highest savings available on the Irish market today, and both qualify for separate SEAI grants you can apply for together.
☀️
Solar panels
Trina Solar Vertex S+ 440W — SEAI grant up to €1,800
⚡
Solar inverter
Hybrid inverter — Huawei, Fronius or Sungrow recommended
🔋
Battery storage
Store surplus solar — use it after dark and cut grid import by 40–60%
🔌
EV home charger
Charge your EV for free from your own solar — myenergi Zappi Eco+ mode. SEAI EV Home Charger Grant: €300
🌡️
Heat pump
Run home heating from solar electricity — SEAI grant up to €12,500
🧠
Smart energy management
Coordinate all systems automatically — maximise self-consumption
💡 Most popular Irish combination in 2026: LONGi or JinkoSolar panels + Huawei SUN2000 hybrid inverter + Huawei Luna2000 battery + myenergi Zappi EV charger. Ask your installer to quote the full system — not just the panels. SEAI grants apply separately to solar (€1,800), heat pump (up to €12,500) and EV home charger (€300) — a total of up to €14,600.
📲 Park & Charge
Download De Energy Hub app
Search for parking and EV charging by location, book a session in advance or scan the QR code on arrival, then check in via the app, all from your phone. Get De Energy Hub free on the App Store or Google Play.
📲 Get De Energy Hub app
Download De Energy Hub to search for parking and EV charging by location, book in advance or scan the QR code on arrival, then check in via the app.
Free to download. Search, book and check in for parking or charging, all from your phone.
De Energy Hub
More power to you®.
🏫 Built for schools, community & public sector
Manage EV charging for staff, fleet and visitors — all in one app
Public sector organisations and schools can manage staff, fleet and visitor EV charging through a single bookable system. Set sessions free with promo codes for staff or charge visitors at Smart Energy rates — automatically balancing your solar with the grid. Eliminate first-come-first-served and let your energy management do the work.
☀️ Pure Energy🔄 Smart Energy🚀 Boost Energy
🆓
Free sessions via promo codes
Issue free or discounted codes for staff — control who charges, when and at what cost
🔄
Smart Energy mode
Automatically draws from solar first, grid second — lower cost charging while reducing your carbon footprint
📋
Full session history
Every session logged — kWh delivered, cost, duration and user — for reporting and billing
A fully installed 4kWp system using the Trina Solar Vertex S+ 440W costs approximately €4,900 before grants — covering 10 panels, a compatible hybrid inverter, mounting and installation. After the SEAI Solar PV Home Grant of up to €1,800, the net cost is around €3,100. System cost varies by county, roof type, installer and whether you add battery storage. Get 3 quotes through the form above for accurate local pricing.
For a typical Irish home (3–4 bedrooms, ~4,000–5,000 kWh/year electricity use), a 4kWp system using the Trina Solar Vertex S+ 440W requires 10 panels (each at 440W). This generates approximately 3,600 kWh per year in Ireland — enough to cover 60–80% of average household consumption. Homes with EVs or heat pumps typically benefit from a 5–6kWp system (12–14 panels).
The Trina Solar Vertex S+ 440W comes with a 30-year performance warranty and a 15-year product warranty. The performance warranty guarantees that the panel will still output at least 87–88% of its original rated power at year 30. The product warranty covers manufacturing defects. Annual degradation is 0.4% — lower than standard PERC panels due to the N-type cell technology.
Yes — the Trina Solar Vertex S+ 440W is well suited to Ireland's climate. Its low-light performance is rated Very Good, which matters because Ireland receives a high proportion of diffuse, overcast light rather than direct sunshine. The temperature coefficient of −0.30%/°C means it loses NaN% efficiency per degree above standard test conditions — in line with industry standards. A 4kWp system in Ireland generates approximately 3,600 kWh/year despite our cloud cover.
N-type i-TOPCon (improved Tunnel Oxide Passivated Contact) is a premium cell technology that offers two key advantages over standard PERC panels. First, it has no Light Induced Degradation (LID) — standard PERC panels lose 1–2% output in their first months of operation; N-type panels produce full rated power from day one. Second, the annual degradation rate is lower (0.4%/yr vs 0.5–0.6% for PERC), meaning more cumulative kWh over the 30-year warranty period. For Irish conditions, the difference over 25 years is typically 3–5% more lifetime energy yield.
Adding battery storage to a Trina Solar Vertex S+ 440W system is recommended for most Irish homes. Without storage, surplus solar generated midday is exported to the grid at €0.09–0.18/kWh (Clean Export Guarantee rate) while you buy grid electricity in the evening at €0.33–0.36/kWh. A battery stores that surplus for evening use, increasing self-consumption from ~30% to 70–90%. A typical 10kWh battery (Huawei Luna2000, BYD) adds €3,200–€4,500 to the system cost and has a payback period of 4–7 years alongside the panels.
Yes — for the same system size (kWp), a 440W panel requires fewer panels than a 400W or 430W panel. For a 4kWp system: with 430W panels you need 10 panels; with 440W you need 9–10. Fewer panels means fewer roof fixings, less time on roof, and a slightly tidier finish. On a small roof this can make the difference between a 4kWp and 4.4kWp system fitting.
Yes — eligible for the SEAI Solar PV Home Grant of up to €1,800 when installed by a SEAI-registered contractor. Apply at seai.ie before work begins.
☀️ Also consider
Other residential solar panels in our Irish directory.
