Ireland Solar & Battery Guide
Quick Verdict
Solar panels: Excellent investment Payback 8 years (reference model: 5 kWp, 8,500 kWh demand, no battery).
Batteries: Worth considering.
Key insight: Ireland has very high electricity prices — among the highest in the EU. Solar yields are moderate (~950 kWh/kWp). The SEAI grant and 0% VAT make solar attractive despite cloudy weather.
Key Statistics
Electricity Prices (2025–2026)
| Tariff | Price | Notes |
|---|---|---|
| Standard residential | €0.37/kWh | Flat rate option available |
| Time-of-use peak | €0.42/kWh | Peak hours vary by supplier |
| Time-of-use off-peak | €0.28/kWh | Usually nights/weekends |
| Feed-in (export) | €0.08/kWh | What the grid pays for excess solar |
| Gas | ~€0.14/m³ | ~10 kWh/m³ |
kWh = kilowatt-hour: The unit on your electricity bill. A 1,000-watt appliance running for one hour uses 1 kWh. An average European home uses about 250–350 kWh per month.
Solar Potential
| Region | Solar Output per kWp | 5 kWp System Annual |
|---|---|---|
| Dublin | 950 kWh/yr | 4,750 kWh |
| Cork (S) | 1000 kWh/yr | 5,000 kWh |
| Galway (W) | 900 kWh/yr | 4,500 kWh |
| Limerick | 950 kWh/yr | 4,750 kWh |
| Waterford (SE) | 980 kWh/yr | 4,900 kWh |
kWp (kilowatt-peak): The maximum power a solar system can produce in perfect midday sun. A 5 kWp system = roughly 12–15 panels. Think of it as the "engine size" of your solar setup.
Ireland has moderate solar potential. Typical for Central/Northern Europe.
Electricity Generation Mix
Understanding how Ireland generates its electricity helps explain why solar is (or isn't) incentivised.
| Source | Share |
|---|---|
| Natural Gas | 48.4% |
| Oil | 3% |
| Wind | 38% |
| Solar PV | 4.8% |
| Biofuels | 3.3% |
Source: Our World in Data (2025). Total generation: 31 TWh.
High renewable penetration: Ireland already gets a significant share from wind and solar. Grid flexibility and storage become more important as variable renewables grow.
Who Uses the Electricity?
| Sector | Share of Consumption |
|---|---|
| Industry | 21.5% |
| Residential (households) | 25.6% |
| Commercial & Public | 50% |
| Transport | 1% |
Subsidies & Incentives
| Program | Type | Status | Notes |
|---|---|---|---|
| SEAI Solar PV Grant | solarGrant | Active | €700/kWp for first 2 kWp, €200/kWp for 2-4 kWp. Max €1,800. Property must be built before 2021. SEAI-registered installer required. 8 months to complete after approval. |
| 0% VAT on domestic solar | vatExemption | Active | 0% VAT on solar supply and installation since May 2023. Confirmed continuing through 2026. |
| Clean Export Guarantee (CEG) | feedInTariff | Active | Supplier-set export rates ~€0.05-0.10/kWh. First €400/year of export income is tax-free. |
Reference Model Results
Using our calculator with a 5 kWp system, 8,500 kWh annual demand, no battery:
| Metric | Value |
|---|---|
| Annual generation | 4,750 kWh |
| Self-consumption | 54.1% (2,569 kWh) |
| Export | 45.9% (2,175 kWh) |
| Self-consumed value | €951/year |
| Export value | €174/year |
| Gross annual saving | €1,125/year |
| Simple payback | 8 years |
| NPV (6%, 25 yr) | €3642 |
| Verdict | Excellent investment |
NPV: Net Present Value. Adds up 25 years of savings, discounted at 6%, and compares to keeping the money in the bank. Positive = solar beats the bank. Negative = you'd be better off investing elsewhere.
Battery Economics
Time-of-use tariffs with a large spread. Battery payback 10–13 years. SEAI grant doesn't cover batteries directly.
Country-Specific Considerations
Ireland has very high electricity prices — among the highest in the EU. Solar yields are moderate (~950 kWh/kWp). The SEAI grant and 0% VAT make solar attractive despite cloudy weather.
Grid Connection
- Typical connection: singlePhase25A
- Single-phase max: 5.5 kWp
- Export limit per phase: 5 kW
- Metering type: netTotal
- Net metering: Your generation offsets consumption across all phases (favorable)
- Net metering policy: none
Red Flags for Ireland Installers
- Claims property built after 2021 qualifies for SEAI grant (must be before 2021) (reviewed 2026-05 — Installer claim monitoring)
- Ignores that grant is capped at 4 kWp (reviewed 2026-05 — Installer claim monitoring)
- Assumes export rate is guaranteed (varies by supplier) (reviewed 2026-05 — Installer claim monitoring)
- Promises payback < 5 years (reviewed 2026-05 — Installer claim monitoring)
When Solar Makes Sense in Ireland
- ✅ You have high electricity bills (above average for your country)
- ✅ You're home during the day (retired, work from home)
- ✅ You have an EV and charge at home
- ✅ You can get available subsidies
- ✅ You value energy independence
Verdict Summary
| Strategy | Payback | Notes |
|---|---|---|
| 5 kWp solar only | 8 years | Excellent investment |
| With battery | Add 4–8 years | Worth considering |
| With subsidies | Subtract 1–3 years | Check current programs |
| With EV charging | Subtract 1–2 years | Increases self-consumption |
Ireland has very high electricity prices — among the highest in the EU. Solar yields are moderate (~950 kWh/kWp). The SEAI grant and 0% VAT make solar attractive despite cloudy weather.
Data as of: 2026-05. Prices and subsidies change — verify with local sources before making decisions.