Northern Ireland now has thousands of homes installing solar — but with export limits (3.68kW max), many homeowners ask: "Is a smaller 3.6kW system still worth it?"
Short answer: Yes — massively.
Yes. Even with cloudy weather, solar works off daylight, not heat. NI's typical output:
3.6kW system → 3,000–3,400 kWh/year
For context: Most NI homes use 3,500–4,200 kWh/year, so the average 3.6kW system covers a huge portion of that. Not sure how many solar panels your home needs? Our guide has you covered.
Most homes are restricted to:
Max export: 3.68kW (G98/G99)
This simply means:
Most NI homeowners still choose a 3.6kW system because:
This is normal and not a disadvantage.
With current rates, a standard NI 3.6kW system (with or without a battery) saves. See exactly how much solar costs in NI:
£450–£650
per year
£700–£1,000+
per year
Batteries boost savings because you use more of your own solar instead of buying from the grid.
Because NI electricity is expensive, and panel prices have dropped, payback is now:
4 – 6 years
(typical NI home)
— even with a 3.6kW system.
After that?
You're generating 15–20 years of pure profit.
This is one of the strongest ROIs of any home improvement. Learn more about solar panel payback periods in NI.
A battery in NI:
Most NI 3.6kW systems with a 5–10kWh battery give the highest savings. Learn more about solar battery systems in Northern Ireland.
| System | Typical NI Price |
|---|---|
| 3.6kW system (no battery) | £5,000–£6,000 |
| 3.6kW + 5kWh battery | £7,000–£8,500 |
| 3.6kW + 10kWh battery | £8,500–£10,500 |
Because the system is smaller, NI homeowners pay less than UK mainland.
A solar system increases NI property values by:
£4,000–£7,000+
Especially when paired with a battery. Buyers love lower bills + improved EPC ratings. Businesses can also benefit — commercial solar installations in Northern Ireland can save companies thousands annually.
A 3.6kW solar system in NI offsets:
700–900 kg CO₂ per year
That's the equivalent of:
Planting 40+ trees yearly
Saving hundreds in energy waste
Running a home off clean energy for months
Most NI homes still use oil. Solar is fantastic for them:
Many rural NI homeowners save £900–£1,100/year. For agricultural properties, solar for farms in Northern Ireland can be especially beneficial with larger installations.
Yes — via the Smart Export Guarantee (SEG).
NI homeowners usually earn:
£70–£140 per year
This isn't huge, but every penny helps your ROI.
At the moment:
No dedicated NI solar grants
But…
We will update this page immediately when new support launches.
YES — 100%. Absolutely.
Even with NIE's 3.68kW restrictions, solar in NI is one of the best financial decisions you can make.
You get:
Solar is worth it for almost every homeowner in NI.
See all our solar guides for more information on going solar in Northern Ireland.
If you're comparing solar installers in Northern Ireland, we can help you get free, no-obligation quotes from trusted local companies.
👉 Compare solar installers in Northern Ireland →Before installing solar, it's important to understand how much solar panels cost in Northern Ireland, including system size and battery options.
👉 See solar panel costs in Northern Ireland →Most homeowners want to know how long it takes to recover their investment. Understanding solar panel payback in Northern Ireland helps you plan.
👉 Learn about solar payback in NI →Adding battery storage allows you to store unused energy and use it later. Explore solar battery systems in Northern Ireland to maximise your savings.
👉 Explore solar battery systems →Not sure how many panels your home needs? It depends on your energy usage, roof space, and goals.
👉 Find out how many solar panels you need →We work with a trusted, MCS-certified NI installer who:
Covers all of Northern Ireland, including solar installers in Belfast and surrounding areas.
We're your local trusted MCS-certified solar installers in Northern Ireland.
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