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.
Get it installed
Find SEAI-registered installers for the Trina Solar Vertex S+ 440W
Tell us what combination you need — solar only or a complete renewable upgrade with battery, EV charger and heat pump. We match you with up to 3 SEAI-registered installers in your area. Free and no obligation.
☀️ Get matched with local installers
Up to 3 SEAI-registered installers in your area will contact you within 1 business day with system recommendations and pricing.
💶 Get quotes
3 local installers · 1 business day
💬 Get advice first
Free assessment · no obligation
Your details are only shared with SEAI-registered Irish solar installers. No spam — ever.
✅
Request sent!
We're matching you with up to 3 SEAI-registered solar installers in your area. Expect contact within 1 business day.
De Energy Hub
More power to youTM.
🏫 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.
