Commercial Solar Grid Connection Services
Commercial Solar UK manages grid connection approvals for all commercial solar PV installations because DNO permission is legally required for systems above 3.68kW per phase.
Solar grid connection services help businesses seamlessly integrate their solar panels with the electrical grid, allowing them to generate clean energy and potentially save money on electricity bills. These services ensure a smooth transition to renewable energy sources.
We complete G99 and G100 applications for clients across the UK so that you avoid delays, rejections, and compliance issues during your project.
Why Grid Connection Is Critical for Commercial Systems
A commercial solar system cannot be connected to the grid without DNO approval because network operators must protect the safety and stability of the local distribution network.
The grid connection is a crucial step for commercial solar systems, as it allows them to harness the power of renewable energy and connect to the electricity network. Without approval from Distribution Network Operators (DNOs), these systems cannot be integrated into the grid, ensuring safety and stability.
Most systems larger than 10kW fall under the G99 application route since they exceed the threshold for automatic grid acceptance. Our engineers handle this process on your behalf so that your installation can proceed on time and with technical approval in place.
What Our Grid Connection Service Includes
We offer a complete grid connection management service because accurate technical submissions lead to faster approvals.
Our service includes:
- G99 or G100 application form preparation
- Single-line electrical diagrams and system schematics
- CT/VT specification matching
- Inverter export control documentation
- Relay and protection settings configuration
- Direct liaison with your local DNO
- Witness testing support, if required
We submit all documentation only after system design is finalised because incorrect data can trigger rejection or delays from the DNO.
G98, G99, and G100 – What They Mean
| Application Type | When It Applies | Process Required |
|---|---|---|
| G98 | ≤ 3.68kW per phase | Self-certification after install |
| G99 | > 3.68kW per phase | Approval required before install |
| G100 | Export-limited systems | Evidence of export control required |
Most commercial systems fall under G99 or G100 regulations because they generate significant power and may affect local grid conditions.
Why We Manage the Grid Application for You
When it comes to DNO applications, the process can be complex and detailed due to the technical language and strict formatting rules involved. This data is crucial for network modelling and ensuring compliance with regulations.
Any errors or missing information in your submission can lead to delays or rejections, as DNOs are required to send back incomplete or inaccurate submissions for corrections.
At our company, we take care of managing this entire process for you so that you don’t have to worry about coordinating engineers, designers, or regulators on your own.
Our dedicated team also handles witness testing when necessary because obtaining final grid approval may hinge on validating safety systems onsit
Typical Grid Application Timeline
The grid approval process usually takes 30–45 working days since DNOs must assess each application in relation to local capacity and existing infrastructure.
Typical timeline:
- Final system design confirmed
- Application prepared and submitted by our engineering team
- DNO reviews technical documentation
- Queries (if any) are resolved with our support
- Conditional or full approval is issued
- Installation proceeds
- Witness test conducted, if required
- System is energised and SEG application follows
We manage every stage to keep your project on track because the grid process can otherwise become a critical bottleneck.
How We Prevent the Most Common Application Failures
| Common Problem | Root Cause | How We Prevent It |
|---|---|---|
| Rejected submissions | Missing schematics or incorrect forms | We use pre-approved templates and QA check before submission |
| Inverter non-compliance | Export control not certified | We specify and document certified inverters |
| Witness test delays | Poor DNO coordination | We schedule and manage all witness testing logistics |
We eliminate these risks because our internal engineering team prepares and submits all documentation with DNO standards in mind.
FAQs
Do I need DNO approval for a 10kW system?
Absolutely, as any system exceeding 3.68kW per phase requires approval prior to installation according to G99 regulations.
Can I submit the G99 myself?
Yes, technically you can, but it’s important to note that most applications tend to encounter issues or delays due to a lack of proper design files, relay settings, or system diagrams.
What does a grid application cost?
DNO fees typically range from £300 to £1,000+ depending on the location and grid impact. We include this cost in our comprehensive project quote so that there are no hidden surprises.
What is a witness test?
Some DNOs require on-site inspection of the system’s export controls. We attend and manage this on your behalf because final grid connection cannot proceed without DNO sign-off in those cases.
Book a Grid Connection Consultation
At commercialsolar.uk.com, we offer comprehensive grid connection services as part of every commercial solar installation project. This means you won’t have to worry about dealing with DNOs, filling out forms, or conducting witness testing.
When you consult with us, you can expect:
- An eligibility check for G99/G100 requirements
- A timeline estimate based on DNO capacity
- Review of inverter compliance
- Planning and control strategy for grid export
- Management of submissions from start to finish
Let us take the hassle out of connecting your renewable energy systems to the grid. Our team will guide you through the process seamlessly so that you can focus on reaping the benefits of clean and sustainable power generation.