SEAI grant covers panels + inverter + mounting + labour. Apply at seai.ie before installation.
SMA Sunny Boy 5.0 — Ireland 2026
German string inverter — bulletproof reliability for battery-free solar
SMA is one of the oldest and most respected inverter manufacturers in the world, with over 40 years of grid-tied solar experience. The Sunny Boy 5.0 is a string-only inverter — no battery capability, no backup power, no ecosystem complexity. It converts solar energy to AC and exports it to the grid or to household loads, full stop. For homeowners who are certain they do not want battery storage and want the most reliable possible solar inverter from a manufacturer with a long track record, the Sunny Boy is the rational choice. Note: if you plan to add a battery in future, a hybrid inverter is strongly recommended instead.
⚙️ Technical Specifications
| Inverter type | Residential String Inverter |
| Rated output | 5 kW |
| Power range | 1.5–6 kWp |
| Efficiency | 97% |
| MPPT inputs | 2 |
| Phase | Single Phase |
| Battery compatible | No — grid-tie only |
| Backup power | ✗ No |
| Monitoring app | SMA Sunny Portal |
| WiFi included | ✓ Yes |
| Warranty | 5 years |
| IP rating | IP65 |
| Suitable for | Residential |
💰 Complete system cost
Grant covers full installed cost — panels, inverter, mounting and labour. Apply at seai.ie before installation begins. SEAI-registered contractor required.
✅ What we like
- 40+ year SMA manufacturing heritage — the most proven brand in solar inverters globally
- 97.0% efficiency — strong for a string inverter
- German engineering — component quality above most Asian-manufactured alternatives
- Simple, reliable: no battery management software complexity
- SMA Sunny Portal monitoring — comprehensive web-based data and export reporting
- IP65 outdoor rated
⚠️ Worth knowing
- No battery compatibility — if you add storage later, you must also replace the inverter
- 5-year warranty — significantly shorter than hybrid rivals offering 10 years
- ~€900 — more expensive than entry-level hybrids that include battery-ready capability
- No backup power
- SMA Sunny Portal interface is dated compared to Huawei FusionSolar or Fronius Solar.web
📐 System sizes — full installed cost & SEAI grant
Full system costs include panels (avg 430W), this inverter (~€900), mounting and labour. SEAI Solar PV Home Grant of up to €1,800 applies to all components. Battery column adds a ~10kWh LFP battery (~€3,200 avg) — the grant does not cover batteries.
| System | Panels | Est. generation | Solar only (after grant) | Est. payback |
|---|---|---|---|---|
| 3 kWp | 7 panels | ~2,700 kWh/yr | ~€3,800 | ~10 yrs |
| 4 kWp | 10 panels | ~3,600 kWh/yr | ~€4,700 | ~9 yrs |
| 5 kWp | 12 panels | ~4,500 kWh/yr | ~€5,600 | ~9 yrs |
| 6 kWp | 14 panels | ~5,400 kWh/yr | ~€6,500 | ~9 yrs |
🔧 Complete your solar system
The Sunny Boy 5.0 is Step 2 — you need panels before it and most Irish homeowners now add battery storage after. Here are the most popular pairings in 2026:
🚗 Add an electric car — charge it from your solar inverter
Your inverter converts roof solar into electricity — your EV turns it into free kilometres. See all 205+ EVs in the EV Vehicle Directory.
☀️ Compatible solar panels
The Sunny Boy 5.0 is compatible with all major solar panel brands available in Ireland. See the Solar Panel Directory to compare specifications, pricing and SEAI eligibility for all 13 panels.
🔋 Battery compatibility
This is a grid-tie only string inverter — it cannot be retrofitted with battery storage. If battery storage is in your future plans, consider the hybrid inverters in the directory instead.
❓ Questions about the Sunny Boy 5.0
⚡ Also consider
Other solar inverters available in Ireland.