Last reviewed: 4 September 2026. Northern Ireland has its own
network operator, its own connection standard and its own building control, so this page is written
separately rather than adapted from the Great Britain guidance.
Plug-in solar kits can be sold and used in Northern Ireland, but almost every practical detail
differs from England, Scotland and Wales. Your network operator is NIE Networks rather than one of the
GB distribution operators, the connection standard is G98/NI rather than plain G98,
and building control is devolved. If you have read a UK guide and assumed it applies here, at least one
thing in it is wrong.
What is the same
The product itself. The Plug-In Solar Amendment (SI 2026/848) made compliant kits lawful to sell
across the United Kingdom from 27 August 2026, and the technical envelope is the same
one used elsewhere: up to 800 W AC at the microinverter, panels up to 2,000 W DC
behind it, no electrician needed for the plug-in connection itself, and no battery inside the kit.
That last point catches people out and is covered in
can you add a battery to a plug-in kit.
The inverter must be on the ENA type test register. This is not a formality: an inverter that is
not listed will have its notification rejected, and you would be generating onto the network outside
the agreed standard.
What is different: G98/NI and NIE Networks
In Great Britain you notify one of six regional distribution network operators, and working out
which one is the first hurdle. In Northern Ireland there is only one, NIE Networks,
which removes that problem entirely. You do not need the DNO lookup
that GB readers need.
The applicable standard is G98/NI, the Northern Ireland version of the micro-generation connection
rules. It works on the same “fit and inform” principle: you install and commission first, then tell the
operator afterwards. It is free and it is a notification, not an application for permission.
| Great Britain | Northern Ireland | |
|---|---|---|
| Network operator | Six regional DNOs | NIE Networks only |
| Standard | G98 | G98/NI |
| Process | Fit and inform | Fit and inform |
| Micro-generation ceiling | 16 A per phase | 16 A per phase |
| Notification window | 28 days | See the note below |
| Cost | Free | Free |
| Installer signature | Not needed for a plug-in kit | Not needed for a plug-in kit |
[VERIFICAR: the exact notification window for G98/NI. Secondary sources give both
28 and 30 days from commissioning, and we could not open the NIE Networks page to confirm which applies
to a plug-in kit. Notify within 28 days and you satisfy either reading. We will correct this page once
we have it from the operator directly.]
An 800 W AC kit draws roughly 3.5 A on a single-phase supply, so it sits far inside the 16 A per
phase micro-generation ceiling. Capacity is not the constraint here; using a listed inverter and
notifying on time are.
What is different: building control and planning
Building regulations and planning are devolved. Part P of the Building Regulations, which people
cite constantly in GB discussions of electrical work, is an England and Wales instrument and does not
apply in Northern Ireland, which has its own building regulations administered by district councils.
For a genuine plug-in kit this is mostly academic, because you are not carrying out fixed electrical
work: you are plugging an appliance into an existing socket. It stops being academic the moment anyone
suggests adding a dedicated circuit, moving a consumer unit or fixing panels to a roof. At that point
you are into notifiable work under the local regime and you need a competent electrician, whatever a
retailer’s marketing implies.
On planning, the permitted development rules for microgeneration in Northern Ireland are set out in
their own legislation rather than in the England and Wales General Permitted Development Order. A
free-standing frame on a patio or a panel on a balcony rail is unlikely to need permission, but listed
buildings and conservation areas are treated more restrictively here as they are elsewhere. If your
property is listed or in a conservation area, ask the council before you buy anything. The general
principles are in
do plug-in solar panels need planning
permission, with the caveat that the specific legislation cited there is the GB one.
What is different: the money
Two things move the arithmetic in Northern Ireland, and they pull in opposite directions.
Sunlight is slightly below the UK average. We use 870 kWh per kWp per year for
Northern Ireland, the same figure we apply to Yorkshire, which is roughly 13% below the South West of
England. That is a modest penalty, not a disqualifying one, and it matters far less than which way your
panels face. The full breakdown is in
how much electricity plug-in solar makes.
Electricity pricing works differently. The Ofgem price cap does not apply in Northern Ireland; the
market is regulated by the Utility Regulator and tariffs are set separately. So the unit rate we use in
the savings calculator, which is derived from the GB
cap, is the wrong starting point here. Take your own unit rate off a recent bill and type it in. Since
every kilowatt-hour you generate and use is one you do not buy, the unit rate is the single number that
converts generation into pounds.
Exports and the Smart Export Guarantee
The Smart Export Guarantee is a Great Britain scheme and does not extend to Northern Ireland, so the
GB debate about whether a self-installed kit can be registered for it is moot here. Either way the
practical conclusion is identical to the rest of the UK: assume you are paid nothing for what you
export, and design around self-consumption. Everything generated while the house is empty is given
away. This is set out in
SEG payments and plug-in solar.
A short checklist
- Confirm the microinverter is on the ENA type test register before buying.
- Notify NIE Networks under G98/NI within 28 days of commissioning.
- Use your own unit rate from a Northern Ireland bill, not a GB price cap figure.
- Check with your district council first if the property is listed or in a conservation area.
- If a supplier tells you a plug-in kit needs Part P sign-off, they are quoting the wrong
jurisdiction at you.
Northern Ireland is a good place for plug-in solar in one specific respect that rarely gets
mentioned: with a single network operator and one notification route, the administrative side is
simpler than anywhere in Great Britain.