If you’ve been thinking about solar panel installation in Northern Ireland whether for your home or your business there’s never been a better time to act. NIE Networks has updated the rules around the G99/NI Fast Track process, and the changes that came into effect on 1st May 2026 open the door for more customers to benefit from a quicker, simpler grid connection.
Here at Solar Power NI, we want to make the process as straightforward as possible. So let’s break down exactly what G99/NI Fast Track is, what’s changed, and what it means for you.
What Is G99/NI Fast Track?
Before any solar panels or generation equipment can be connected to the electricity network in Northern Ireland, it must be approved by NIE Networks. The process you go through depends on the size of your system.
G98/NI covers smaller installations up to 16A per phase (roughly 3.68kW on a single-phase supply). This is a straightforward “fit and inform” process you install first and notify NIE Networks afterwards.
G99/NI is required for anything larger. Crucially, this is an approval-before-install process you cannot begin installation until NIE Networks has reviewed and approved your application.
G99/NI Fast Track sits within the G99/NI process and is designed to make things quicker and simpler for installations that meet specific criteria. It’s a streamlined route to approval for solar panel installers in Northern Ireland, cutting out much of the complexity of a full G99/NI application.
What Changed on 1st May 2026?
This is the big news. NIE Networks significantly expanded who can use the Fast Track route great news for homeowners and businesses exploring solar energy systems across Northern Ireland.
Previously, the Fast Track option was only available if your Total Installation Capacity (TIC) was up to 16A per phase. From 1st May 2026, that threshold has been raised to 60A per phase a substantial increase that brings many more domestic and commercial solar installations within scope.
Here’s a quick summary of the updated criteria:
- Total Installation Capacity (TIC): up to 60A per phase (previously 16A per phase)
- Maximum individual inverter size: 32A per phase (equivalent to 7.36kW)
- Export limit to the grid: remains at 16A per phase
- All generation and storage devices must be fully type-tested and listed on the ENA Type Test Register with valid approval for use in Northern Ireland
So while you can now install a larger solar energy system under Fast Track, the export limit to the grid stays the same. The key benefit is the diversity of what you can connect more solar generation capacity combined with battery storage, for example, can now be approved through the faster route.
Why Does This Matter for Homeowners and Businesses in Northern Ireland?
For homeowners and businesses across Belfast, Derry, Lisburn, Newry, Antrim and beyond, this change is genuinely significant. Here’s why:
More solar systems qualify for Fast Track. Previously, a system with larger solar generation combined with battery storage would often require a full G99/NI application, a more involved process. The updated rules mean many of those residential and commercial solar systems can now go through Fast Track instead.
Faster approvals mean faster installations. The Fast Track route is designed to be quicker and simpler than the full G99/NI process. Getting your approval sooner means your solar panel installation in Northern Ireland can proceed sooner and you start saving on your energy bills sooner.
Battery storage is included. G99/NI Fast Track covers solar panels, wind turbines, and battery storage, so hybrid systems that maximise your self-consumption and reduce reliance on the grid can go through this route. With electricity prices still high across Northern Ireland, adding battery storage alongside your solar panels is one of the smartest investments you can make.
Commercial solar installations benefit too. For businesses researching commercial solar energy systems, warehouses considering solar, or companies looking at solar design and installation for their premises, the expanded Fast Track criteria makes the connection process significantly less burdensome.
What You Need to Know Before Applying
A few important points to keep in mind before you go ahead with your solar panel installation:
Approval must come before installation. G99/NI Fast Track is not a “fit and inform” process like G98/NI. NIE Networks must grant approval before any installation work begins. Working with an experienced MCS-certified solar installer in Northern Ireland like Solar Power NI means this is handled correctly from the start.
Your inverter must be approved for Northern Ireland. Not all inverters are listed for use in NI. G98/NI type-tested inverters and G99/NI Type A type-tested inverters are permitted for installations up to 16A per phase. You should check the ENA Type Test Register via the Connect Direct website before specifying equipment.
Milestone dates apply. Once you receive a connection offer, there are key deadlines to be aware of:
- Planning Milestone Date: If planning permission is required, evidence must be submitted within 120 calendar days of receiving your offer.
- Longstop Milestone Date: Connection works must be completed within 24 months of the Scheduled Completion Date.
- Utilisation Milestone Date: Your system must be fully commissioned within 24 months of the connection works being completed.
Missing these dates could result in your export capacity being reduced or retracted, requiring a fresh application.
Application fees apply. All G99/NI and G99/NI Fast Track applications carry a fee, which varies depending on the specifics of your project. G98/NI submissions are the exception these carry no fee.
Solar Panel Grants and Incentives in Northern Ireland
While you’re planning your installation, it’s worth knowing about the financial support available to homeowners and businesses in Northern Ireland:
- 0% VAT currently applies to solar panel installations, saving you hundreds of pounds compared to the standard rate.
- The Northern Ireland Sustainable Energy Programme (NISEP) provides grant funding covering up to 20% of costs for businesses investing in sustainable energy systems.
Combined with the savings solar panels generate on your electricity bills typically £500–£900 per year for a domestic system the financial case for solar in Northern Ireland has never been stronger.
How Solar Power NI Can Help
Navigating grid connection applications can feel daunting, but it doesn’t need to be. At Solar Power NI, we are experienced solar panel installers serving homeowners and businesses across Northern Ireland from Belfast and Derry to Lisburn, Newry, Antrim and everywhere in between.
We handle the G99/NI Fast Track application process on your behalf from checking that your system design qualifies, to ensuring your inverter is on the approved register, to tracking your application through every stage.
Whether you’re looking at residential solar panels, commercial solar energy systems, battery storage, or a combined solar and battery installation, get in touch with us today. We’ll assess whether your project qualifies for the Fast Track route, walk you through any available grants, and guide you from first consultation through to a completed installation.
Ready to get started? Contact Solar Power NI for a free consultation.
