If you’re planning to install a solar PV system, battery storage, or other renewable energy technology, you’ve likely come across the term G99 application. But what exactly is a G99, why do you need one, and how long does the approval process take?

At Blue Ape Renewables, we specialise in handling the entire G99 application process, ensuring your system is compliant and approved with minimal hassle. Whether you’re installing solar panels, a battery storage system, or an EV charger, we make sure everything is fully authorised by your Distribution Network Operator (DNO) so you can start generating and using your own clean energy.

What is a G99 Application?

A G99 application is a formal request to your local Distribution Network Operator (DNO) to connect a renewable energy system—such as solar panels, battery storage, or a wind turbine—to the electricity grid.

💡 In simple terms:
When you install a solar PV system or battery, it generates electricity. Some of that power is used in your home, but any excess energy is sent back to the grid. The G99 process ensures that your system is safe and does not disrupt the grid’s stability.

 

Why is G99 Approval Required?

✅ Ensures the grid can handle the extra power from your system.
✅ Prevents power quality issues like voltage fluctuations.
✅ Protects your equipment from faults in the network.
✅ Ensures legal compliance – You cannot export power without DNO approval.

 

Which Products Require a G99 Application?

A G99 application is required for most large-scale renewable energy installations, including:

🔹 Solar PV Systems Over 3.68kW (Single-Phase) or Over 11kW (Three-Phase)
If your solar system exceeds these limits, you must apply for G99 approval before connecting to the grid.

🔹 Battery Storage Systems (If Capable of Exporting to the Grid)
Even if you don’t have solar panels, a battery storage system that can export electricity to the grid requires a G99 application.

🔹 Hybrid Inverters
If you’re upgrading to a hybrid inverter, which manages both solar and battery power, a G99 application is necessary if it exceeds the single-phase or three-phase export limits.

🔹 Wind Turbines, Hydro Systems & Other Renewables
Any renewable energy system that exports power to the grid requires DNO approval through a G99 application.

💡 Top Tip: If your battery system is set to "No Export Mode", it may not require a full G99, but you will still need DNO notification under G100 regulations.

 

How Long Does a G99 Application Take?

The G99 approval process can vary depending on your DNO (Distribution Network Operator) and the complexity of your system.

 

Typical G99 Timeline

📅 Step 1: Application Submission – We submit the necessary forms, technical specifications, and system details to the DNO. (1-2 weeks)

📅 Step 2: DNO Review & Assessment – The DNO evaluates your application, checking the grid’s ability to handle your system. (6-12 weeks)

📅 Step 3: Approval & Grid Connection Agreement – Once approved, you receive the connection agreement, and installation can proceed. (Total time: 6-14 weeks)

💡 Top Tip: DNOs sometimes request network reinforcements, which can extend the process if upgrades are needed. Blue Ape Renewables will always check for any grid limitations upfront to prevent delays.

 

What Happens If Your G99 Application Is Rejected?

Sometimes, a G99 application is declined or delayed due to grid capacity issues. This can happen if:

❌ The local grid cannot handle additional export capacity.
❌ There are voltage stability concerns.
❌ Your location is far from a strong grid connection point.

 

What Are Your Options?

✅ Apply for a Reduced Export Limit (G100 Compliance) – Some DNOs will approve the system if export is limited to a lower value.
✅ Upgrade to a Smart Battery System – A system like Tesla Powerwall can store energy instead of exporting it, reducing the need for G99 approval.
✅ DNO Network Upgrades – In some cases, the DNO will offer an upgrade (but this can be costly).

💡 Blue Ape Renewables always checks your grid capacity in advance to prevent unnecessary delays.

 

How Blue Ape Renewables Handles Your G99 Application

At Blue Ape Renewables, we take care of the entire G99 application process, making it easy and stress-free for you.

✅ Full Application Handling – We submit all required paperwork and technical details.
✅ DNO Liaison – We communicate directly with your Distribution Network Operator.
✅ System Optimisation – We design your system to ensure compliance and avoid unnecessary delays.
✅ Real-Time Updates – We keep you informed every step of the way.

💡 Watch our YouTube channel to see how we manage G99 applications for real-world installations!

 

Commonly Asked Questions About G99 Applications

1. Do I need a G99 application for a small solar PV system?
If your solar system is under 3.68kW (single-phase) or 11kW (three-phase), you may only need a G98 notification (which is simpler).

2. How do I know if my home needs a G99 application?
If you’re installing solar panels, battery storage, or a hybrid system above the export limits, a G99 application is required. Blue Ape Renewables will assess this before installation.

3. Can I install my system before G99 approval?
No. You must wait for DNO approval before turning on your system if it falls under G99 regulations.

4. Will my electricity supplier help with the G99 process?
No. The responsibility falls on the installer and the homeowner. Blue Ape Renewables handles this for you.

5. How much does a G99 application cost?
The DNO may charge a processing fee (varies by location). We include this in your project cost upfront.

6. Can I speed up the G99 process?
While some DNOs process applications faster than others, early planning is key. We ensure all paperwork is submitted correctly the first time, preventing delays.

7. Do battery storage systems always need G99 approval?
If your battery exports to the grid, a G99 application is required. If it’s set to No Export Mode, you may only need a G100 notification.

8. What happens if my system is too large for grid approval?
We can apply for a reduced export limit, upgrade the DNO connection, or install a hybrid system that prioritises battery storage.

9. Will a G99 application affect my electricity bill?
No, but once approved, you may be eligible for export tariffs, which allow you to sell excess solar energy.

10. Why should I choose Blue Ape Renewables for my G99 application?

✔ We handle everything for you—from application to installation.
✔ We optimise your system to meet G99/G100 requirements.
✔ We provide real-time updates and professional DNO liaison.
✔ We are a trusted, MCS-certified installer with years of experience.

 

Get Your G99 Application Started Today!

📞 Call us today for expert advice & application handling: 0151 452 4085
📧 Email us: info@blueaperenewables.co.uk

💡 Let Blue Ape Renewables handle your G99 application and get your system connected without delays! 🚀🔋☀️