Can You Go Off‑Grid with Solar in Ireland?

Yes, you can go off-grid with solar in Ireland, but it requires a significant investment in equipment and careful planning. Most homeowners are better off with a hybrid grid-tied system that includes solar, battery storage, and mains backup.

Off‑Grid Systems: What Do They Involve?

An off-grid solar system generates all your household electricity on-site, without any connection to the national grid. This means you’ll need not just solar panels, but also significant battery storage and possibly a generator or wind turbine for backup during low-light periods.

Essential components include a robust solar array (typically 5–8 kWp), a battery bank of 10–20 kWh (or more), and a hybrid inverter capable of switching between solar, battery, and backup power .

The Financial and Practical Trade-Offs

Off-grid setups come with a high upfront cost compared to grid-connected systems. A complete system, though heavily dependent on size and capacity, can range from around €5,000 for a modest kit to €13,000 or more for larger setups.

In contrast, a grid-tied system with solar and battery can cost roughly €6,000–€8,000 after SEAI grants, while off-grid systems lack grants and depend entirely on self-generated power.

Seasonal Challenges in Ireland

Ireland’s moderate climate means winter solar output is low, typically only a few hundred kWh per month from a 4 kWp system. To stay off-grid year-round, you’d need large battery packs or hybrid solutions, as well as backup generation and precise energy management.

That often means adding a diesel generator or small wind turbine to ensure you have enough power during prolonged cloudy spells.

Grid‑Tied Hybrid: A Better Solution for Most

Most homeowners benefit more from a grid-connected system with battery storage backup:

• Lower initial investment
• SEAI eligibility with grants up to €1,800
• Backup from the grid when solar or batteries run low
• Export earnings via the Clean Export Guarantee (CEG)
• Hybrid systems allow you to maximise solar use during the day and seamlessly return to grid power in the evenings or during winter.

Factors You Must Consider

• Cost vs independence: Off-grid systems cost 2–4 times more than comparable grid-tied setups energyserv.ie.
• Maintenance: Batteries degrade over time (10–15 years typical), generators need fuel and servicing, and system monitoring is essential .
• System sizing: You’ll need a larger array and battery to match your annual usage, especially if you plan EV charging or heat pumps .

WattCharger’s Recommendation for Irish Homes

We believe the smart choice for most Irish homeowners is a hybrid, grid-tied solar system with battery storage. This setup offers the best balance of cost, reliability, flexibility, and clean energy use.

You get solar during the day, battery power at night, and support from the grid when needed, backed by grants and CEG earnings. It’s the most sensible way to be energy-resilient without breaking the bank.

Want to Find the Right Fit?

Whether you're considering off-grid or a smart grid-tied system, WattCharger can help. We offer tailored solar and battery designs, SEAI grant support, professional installation across Ireland, and ongoing service to ensure your setup performs at its best.

Get in touch today for a no-obligation consultation. Let's design your ideal energy future.