What Is the DNO and Why Does It Matter?
If you’re installing solar panels or a heat pump, DNO approval is a must.
But what is the DNO? Why do you need their permission? And how does EcoGlow handle it for you? Let’s break it down.
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What Is the DNO?
DNO stands for Distribution Network Operator — the company that owns and operates the electricity infrastructure in your area (cables, substations, transformers).
There are 6 main DNO regions in the UK, including UK Power Networks, Western Power Distribution, and Northern Powergrid.
The DNO is not your electricity supplier — but they control whether new energy-generating or high-load devices (like solar PV or heat pumps) can connect safely to the grid.
When Do You Need DNO Approval?
Scenario |
Approval Needed? |
| Installing Solar PV (3.6kW+) | Yes — G99 or G98 submission |
| Adding Battery Storage | Usually — especially if exporting to grid |
| Installing Heat Pump | Yes — due to high starting current |
| Just changing appliances | Not usually, unless load changes drastically |
We Handle All DNO Submissions
What’s the Process?
- We complete a G98 or G99 application
- G98 = small-scale, often after install
- G99 = larger systems or export — must be pre-approved
- DNO assesses the system’s impact on the grid
- May request additional info (e.g., inverter spec, site maps)
- Approval returned in 1–4 weeks
- We track this and coordinate your go-live date
- You receive formal documentation
- Often required for SEG payments and legal compliance
How Long Will My DNO Take?
See My Install Timeline
What Happens If You Don’t Get DNO Approval?
- Your system may not be legally connected
- You may not be allowed to export energy
- SEG payments may be withheld
- You risk voiding your warranty or insurance
How EcoGlow Handles It
-
We manage the entire DNO application for every install we do
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We use pre-approved system designs to speed up the process
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We track and communicate all updates to you
- You receive final approval documentation with your install pack
Book a DNO-Ready Survey
Check My Install Timeline
Will DNO approval delay my install?
Sometimes — G99 approvals can take up to 4 weeks. We apply early.
Do I need to talk to the DNO myself?
No. EcoGlow handles it entirely for you.
Can I still get SEG payments without DNO?
No. MCS + DNO documentation are required to register with SEG suppliers.
We’ll Get You Connected — Legally, Safely, and Smoothly
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