Contacted Solar Tech Support when trying to understand what my Givenergy inverter problem might be and what might be my options. Received good/honest advise which backed up my thoughts.
Hugh Speirs · Apr 2026
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.
from £45 · 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 ApplicationI've spoken to Ron a couple of times with issues with my Givenergy installation. Such a friendly knowledge guy very highly recommended. Thank you very much for resolving my issues
michael fairhurst · May 2026
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
I reached on behalf of a friend, who had lost control of their battery following a storm. A couple giv energy “dealers” had attempted and said different fixes. None worked. Solar tech support solved it remotely on the first attempt almost instantly. Genuinely a 10/10 service.
Will Jay · Jun 2026 Google
Contacted Ron with a problem and he sorted it out quickly with no problems at all. Very knowledgeable on anything solar/ batteries. I would recommend him to anyone
Phill · May 2026
Our SolarEdge PV system with LG batteries had its first hiccup after 8 years of hard work. The Inverter failed. Fortunately I found Solar-Tech-Support who diagnosed the problem very quickly, ordered a replacement unit and fitted it shortly after we received the unit from SolarEdge. Very thorough and professional approach. Thank you, a solid 5 star recommendation.
Les Bennett · Jun 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 inverter's maximum export capacity — not your panel output, not your battery size. 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. For Fast Track G99, the DNO has 20 business days to respond; if they don't object, the connection is deemed approved. For standard G99, the window extends to 65 business days. 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 inverter's maximum export power, not your panel capacity or battery storage. 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 responds within 20 business days (~4 weeks).
Standard G99: DNO responds within 65 business days (~13 weeks).
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 your inverter is rated at 3.68 kW or below. Conversely, a system with no battery at all but a 5 kW inverter requires G99. 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 push your export capacity 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
Some DNOs require G99 even for systems below the 3.68 kW threshold if your area has reached cumulative generation capacity limits. 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 applies to solar or battery systems with an inverter output of 3.68 kW or less per phase. It requires only a post-installation notification to the DNO — no prior approval needed. G99 applies to systems above 3.68 kW per phase, or in network-constrained areas regardless of size, and requires a formal application and DNO approval before installation. Most domestic systems above the G98 threshold qualify for Fast Track G99 with a 20 business day response window. 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.
Fast Track G99 has a 20 business day response window — approximately four weeks. If the DNO does not object within that period, the connection is deemed approved and installation can proceed. Standard G99, used for larger or more complex installations, allows the DNO up to 65 business days (approximately 13 weeks). 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.
It depends on whether the change affects your inverter's maximum export capacity. Adding a battery to an existing hybrid inverter usually does not change the export capacity — 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) increases export capacity above the G98 threshold and requires a G99 application or G99 variation. 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. From £45.
- G98 notification or G99 approval — we determine which
- All five UK DNOs covered
- Retrospective filings for unregistered systems
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