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.
REC Group Alpha Pure Black 405W — Ireland 2026
Norwegian HJT — the best low-light panel for Irish conditions
The REC Alpha Pure Black is the premium choice for Irish homeowners who want the best performance in Ireland's climate specifically. HJT technology has the lowest temperature coefficient available (−0.24%/°C) and the best low-light performance of any panel type — critical advantages in Ireland's frequently overcast conditions. The all-black design is virtually invisible on a dark roof. A 20-year product warranty is class-leading.
⚙️ Specifications
| Wattage | 405 W |
| Efficiency | 21.7% |
| Cell technology | HJT (Heterojunction) |
| Dimensions | 1730 × 1016 × 30 mm |
| Weight | 19.5 kg |
| Temperature coefficient | −0.24%/°C |
| Product warranty | 20 years |
| Performance warranty | 25 years |
| Annual degradation | 0.25%/yr |
| Low-light performance | Excellent |
| Frame | All-Black |
💰 Pricing & SEAI grant
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.
🚗 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.
✅ What we like
- Best low-light performance of any panel — ideal for Irish climate
- Lowest temperature coefficient available (−0.24%/°C)
- 20-year product warranty — class-leading
- All-black — discreet on dark roofs
- Norwegian design and quality
- 0.25% annual degradation — lowest in this directory
⚠️ Worth knowing
- Premium price (~€240/panel)
- 25-year performance warranty vs 30 on some rivals
- Slightly lower wattage (405W) than top N-type options
📐 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 | 8 panels | ~2,700 kWh/yr | €1,800 |
| 4 kWp | 10 panels | ~3,600 kWh/yr | €1,800 |
| 5 kWp | 13 panels | ~4,500 kWh/yr | €1,800 |
⚡ Compatible inverters
The Alpha Pure Black 405W 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.
🔧 Complete your solar system
The Alpha Pure Black 405W 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.
🌡️ 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.
🔌 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.
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.
🏠 Your complete renewable home upgrade
The Alpha Pure Black 405W 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.
❓ Alpha Pure Black 405W — frequently asked questions for Irish buyers
☀️ Also consider
Other premium solar panels in our Irish directory.