Excellent response to diagnose a problem on our SolarEdge installation. Kept us informed at every step. Diagnosis quickly completed and solution implemented.
Les Bennett · May 2026 Trustpilot
DNO paperwork · G98 and G99
DNO export application support G98 and G99 paperwork handled for you
We handle the entire DNO application process — G98 notifications, G99 approvals, Fast Track submissions, and retrospective filings for systems where the paperwork was never done. All UK distribution network operators covered.
£95 all five UK DNOs covered
- All five UK DNOs — UKPN, NGED, NPg, SPEN, SSEN
- G98 notification or G99 approval — we determine which you need
- Retrospective filing if installer never registered the system
- Confirmation reference number provided on completion
Start your DNO application
We prepare and submit your G98/G99 export application end to end — paperwork, technical schedules, and DNO liaison — so you can export and get paid for what you generate.
Start DNO ApplicationAfter recently changing my fuse board the ct clamp broke, this meant my inverter was not communicating properly with my GivEnergy system. After several people letting me down, finally got put in touch with Ron. He came out within 24hours & resolved the fault within an hour, no fuse just got on with it. Work was tidy & arrived when he said he would. Ron followed up a few days later to confirm all was still good, great service from all involved.
Mr Paddy · Jul 2026 Trustpilot
I contacted Solar Tech Support because I had a problem with my legacy GiveEnergy installation. within 24 hours they had diagnosed the problem and offered advice on resolution. Because they were unable to fix the problem there was no charge! This despite numerous time consuming emails. I am currently trying to engage with the original installer but if that is unsuccessful I will go back to Solar Tech Support and ask them to repair the system with a retrofit. Very knowledgeable and responsive. I highly recommend them.
Tim Hatt · Aug 2026 Google
We decided to treat ourselves to an upgrade to our existing solar system, and after a little searching, it became evident that Ron and his team provide the service and support we required. Decommissioning and recommissioning our new SunSynk Acure inverter and a wall-mounted Fogstar battery (which is of substantial size and weight compared to the original) was completed swiftly and competently. The installation was perfectly executed, and all upgraded paperwork for the increased battery export capacity was handled by Ron. I have no hesitation in recommending this team of support technicians to you.
iain donkin · Sep 2026 Trustpilot
The Solar Tech Support company was the only one to respond to a request for someone to supply and fit a new inverter for our solar panels after our old one finally expired after 26 years. Ron kept us well informed throughout, came and ascertained that the issue was down to the inverter having failed then sourced and fitted a new one. He got the system up and running again, set up the wi-fi performance feedback and took away the old inverter for disposal. By acting promptly and fitting the job around existing commitments we were able to get our solar power unit back in operation with minimal delay in the short while before we were due to go away for a week. The work was carried out very professionally and we were asked to confirm that all was in order the following day. I was impressed that, having recently taken on additional work for GivEnergy customers we were able to keep our solar panel down-time to a minimum. I would highly recommend for prompt attention and first-rate service.
James Dignan · Aug 2026 Trustpilot
Had a fault on a GivEnergy AC coupled 3kW home battery and was getting no joy from multiple companies I contacted, as well as the original installer. Contacted Solar Tech Support and they sorted it really quickly, now working perfectly again, can’t recommend them highly enough, professional and very responsive!
John Jones · Jul 2026 Google
What's included
G98/G99 Assessment
We review your inverter specifications and system configuration to determine whether G98 or G99 applies. The threshold is 3.68 kW per phase of inverter output — not panel capacity, not battery size. We confirm the correct route before filing anything.
Application Preparation
Each DNO has its own portal and form requirements. We prepare the full application with your system specifications, MPAN, site address, and supporting documentation formatted to match the specific DNO's requirements.
Submission & Tracking
We submit the application directly via the correct DNO portal, track it through to acceptance, and provide you with the confirmation reference number. For G99, we follow up throughout the approval window.
Export Limit Configuration
If the DNO approval includes conditions — an export limit, reactive power setting, or other parameter — we can configure these in your inverter remotely, ensuring your system complies with the approval letter from day one.
Ideal for
New solar or battery installation that needs G98 notification or G99 approval before going live
Installer went bust and never filed the DNO paperwork — system is unregistered
Upgrading from a smaller inverter to a larger unit and the change pushes you from G98 to G99
Rejected SEG application because DNO registration is missing or incorrect
Bought a house with solar and the previous owner's DNO paperwork is missing or filed under the wrong name
How it works
1
We assess your system and determine the correct application
G98 or G99 is determined by your total inverter output (every solar and battery inverter on the connection), not your panel output or battery size, and not by any export limit. The single-phase threshold is 3.68 kW. We review your inverter model and system configuration to confirm which standard applies and whether Fast Track G99 is available. If your system is already installed but unregistered, we determine whether a retrospective G98 notification or a retrospective G99 application is needed.
2
Application prepared with correct documentation
Each of the five UK DNOs has its own portal, forms, and documentation requirements. We prepare the full application package: system specifications, inverter model and serial number, total generation capacity, export capacity, MPAN, site address, and installation date. Everything formatted to match the specific DNO's requirements so nothing is sent back for correction.
3
Submitted and tracked through to confirmation
We submit the application via the correct DNO connections portal. For G98, this is a notification — no approval wait. Many domestic G99 systems can use the Fast Track (G99's Small Generation Installation procedures, on Form A1-2): the DNO replies within 10 working days rather than about 45, and nothing is fitted until it does. On the standard G99 route, the DNO can take up to 45 working days to reply on a low-voltage connection. We track the application and follow up with the DNO if needed until you have a confirmed registration reference number.
4
Export limit and conditions configured
G99 approvals often include conditions — a specific export limit, reactive power requirements, or communication settings. If your approval letter includes conditions, we can configure these in your inverter remotely so your system complies from day one. We also verify that your existing export limit settings match the DNO agreement, which is a common source of problems after smart meter installations.
G98 vs G99 — quick reference
The correct standard depends on your total inverter output, not your panel capacity, battery storage or any export limit. Here's how the two standards compare. For a full breakdown, see our complete G98 vs G99 guide.
G98
≤ 3.68 kW per phase
Post-installation notification only — no prior approval needed.
Submitted to your DNO after the system is installed and commissioned.
No waiting period. System can export immediately once notification is filed.
Applies to most standard single hybrid inverters (e.g. GivEnergy Hybrid 3.6 Gen 3, SolarEdge 3.68 kW).
G99
> 3.68 kW per phase
Formal application required — must be approved before installation begins.
Fast Track G99: DNO replies within 10 working days.
Standard G99: DNO can take up to 45 working days on a low-voltage connection.
Applies to larger hybrid inverters (e.g. GivEnergy Hybrid 5.0/8.0 Gen 3, Sunsynk 5 kW+).
Common misconception: G98 and G99 are determined by inverter output power, not battery storage capacity. You can have 47.5 kWh of battery storage and still fall under G98 if the total inverter output, solar and battery inverters together, is 3.68 kW or below on a single-phase supply. Conversely, a system with no battery at all but a 5 kW inverter is G99, and limiting its export to 3.68 kW does not change that. See our full guide for details.
Not sure which applies to your system? We determine the correct standard as part of the service — just tell us your inverter brand and model when you book.
When you need DNO application support
DNO registration is a legal requirement for any grid-connected generation system in the UK. These are the most common situations where our support is needed.
Installer never filed the paperwork
The most common issue. The installer commissioned the system but never submitted the G98/G99 notification. This can block SEG payments, cause problems during property sales, and technically means your system is non-compliant. We file retrospectively. See also: DNO paperwork recovery guide.
System upgrade changes export capacity
Upgrading from a 3.6 kW to a 5 kW inverter, or adding a second inverter, may take your total inverter output above the G98 threshold into G99 territory. A new or amended application is required before the upgrade is commissioned. We handle the variation and new submission.
SEG application rejected
Energy suppliers require confirmed DNO registration before accepting a Smart Export Guarantee application. If your SEG was rejected due to missing registration, we file the DNO application, obtain confirmation, and you can resubmit with the reference number.
Bought a house with existing solar
You've moved into a property with solar panels and the previous owner's documentation is incomplete or missing. We check DNO registration status, file retrospectively if needed, and ensure the registration reflects the current ownership.
Constrained network area
If your area has reached cumulative generation capacity limits, a G99 application can come back with an export limit or a network study. We check your area status with the DNO and handle the G99 submission if required, including any export limitation conditions.
Export limit issues after smart meter
Smart meter installations can disrupt export limit settings, sometimes capping export to 0 kW. We verify your inverter's export settings match the DNO agreement and correct any mismatches. If the DNO agreement itself needs updating, we handle the variation. See also: export limitation guide.
Frequently asked
G98 covers systems up to 16 A per phase, which is 3.68 kW on a single-phase supply and 11.04 kW on three-phase. It requires only a post-installation notification to the DNO, with no prior approval. Anything bigger is always G99, even with export limited: a 5 kW inverter limited to 3.68 kW is still G99, never G98. Many domestic G99 systems can use the Fast Track (G99's Small Generation Installation procedures, on Form A1-2): the DNO replies within 10 working days rather than about 45, and nothing is fitted until it does. For a full breakdown, see our G98 vs G99 explained guide.
Yes. If your installer failed to submit the G98 notification or G99 application — whether they went bust, simply neglected it, or filed it incorrectly — we can file a retrospective application on your behalf. The DNO needs your system specifications, MPAN, and installation date. We handle the entire process and provide you with the confirmation reference number. This is one of the most common reasons people use this service. See our DNO paperwork recovery guide for more detail on the situation.
Many domestic G99 systems can use the Fast Track (G99's Small Generation Installation procedures, on Form A1-2): the DNO replies within 10 working days rather than about 45, and nothing is fitted until it does. A battery set up to run the home in a power cut (island mode) can't use the Fast Track, so it goes through the standard G99 process. On the standard G99 route, the DNO can take up to 45 working days to reply on a low-voltage connection. G98 notifications are immediate — no approval wait required, the system can export as soon as the notification is filed. We prepare and submit as quickly as possible so the clock starts straight away.
DNO export application support costs £95 per application, whether it is a G98 notification, a G99 application, or a retrospective filing for a system that was never registered. The price covers determining which standard applies, preparing the full application package, submitting it via the correct DNO portal, and tracking it through to a confirmation reference number. All five UK distribution network operators are covered.
It depends on whether the change affects your total inverter output. Adding a battery to an existing hybrid inverter usually does not change that — the inverter is already rated and registered. No new application needed. But upgrading to a larger inverter (for example, moving from a 3.6 kW to a 5 kW unit) takes your total inverter output above the G98 threshold and requires a G99 application or G99 variation, even if export is limited. Adding extra batteries also does not change the G98/G99 status — it's always about inverter output, not storage capacity. We assess your specific situation and handle whichever application is needed. See also: adding a battery guide.
An unregistered system creates several problems. Your DNO may issue a disconnection notice if they discover the installation during a network survey or smart meter installation. You will not qualify for the Smart Export Guarantee (SEG), meaning you cannot be paid for electricity exported to the grid. It can complicate property sales, as conveyancing solicitors increasingly check for DNO registration as part of the purchase process. And technically, an unregistered grid-connected generator is non-compliant with the Electricity Safety, Quality and Continuity Regulations (ESQCR). We file retrospective applications to resolve this — the process is straightforward once you have the right documentation.
All five UK distribution network operators: UK Power Networks (UKPN) covering South East England, East England, and London; National Grid Electricity Distribution (NGED, formerly Western Power Distribution) covering the Midlands, South West, and Wales; Northern Powergrid (NPg) covering North East England and Yorkshire; SP Energy Networks (SPEN/Scottish Power) covering Central and Southern Scotland plus Merseyside and North Wales; and Scottish and Southern Electricity Networks (SSEN) covering Northern Scotland and Southern England. Each DNO has its own portal and submission process — we know them all.
Book
Need DNO paperwork sorted?
Whether it's a new G98 notification, a G99 application, or retrospective filing for a system that was never registered — we handle the entire process. £95 per application.
- G98 notification or G99 approval — we determine which
- All five UK DNOs covered
- Retrospective filings for unregistered systems
Service notice
We’re busier than ever. Thank you for your patience.
Due to unprecedented demand we’re currently only carrying out on-site work in Yorkshire, and replies are taking up to 7 days. Remote diagnostics continue for the whole UK as normal.
Every message is read and answered, so please don’t send it twice; that only slows the queue.
Ronald Director, Solar Tech Support
On-site: Yorkshire only, for now
Remote: UK-wide, as usual
Remote fix: £125 if we fix it, no charge if we don’t
Replies: within 7 days
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