Feature · Commercial, up to 1 MW
Commercial solar and battery, up to 1 MW.
Above 50 kW, CLRD fills the ENA Standard Application Form from the job: the application before you install, its as-installed data after.
What it is
The G99 Standard Application Form, filled from the job.
Above 50 kW on a three phase supply, a G99 Type A installation outgrows the A1-1: the DNO wants the ENA's Standard Application Form. CLRD fills it from the job you have already entered, plus the details the form needs beyond the job, asked for on the job page. The application goes in before installation, and after commissioning its as-installed data goes behind the A3-1. Solar and battery storage, fully or partially type tested, up to 1 MW.
Why it matters
The Standard Application Form is a long engineering form, and the DNO's clock only starts once the application is complete: 45 working days to make a connection offer, or 65 where its own works reach high voltage. An application that goes in short costs weeks before anyone has looked at it. CLRD won't build the pack until the details the form needs are in, and the as-installed version after commissioning comes from the same entry rather than being keyed in again.
For installers taking on commercial solar and battery storage.
- Three phase, above 50 kW and below 1 MW: G99 Type A on the ENA Standard Application Form.
- Filled from the job you have already entered, plus the details the form needs beyond it, asked for on the job page.
- Before installation, the application. After commissioning, its as-installed data behind the A3-1.
- Solar and battery storage, fully or partially type tested to G99 Type A.
- A bank of identical inverters or batteries goes in once, with how many there are.
- The single line diagram draws the commercial supply side: the main LV switchboard, a separate G99 interface protection relay where fitted, and CT metering where the supply has it.
- Export limited? G100 Form A goes with the application and Form C with the commissioning.
- Not covered: EV chargers, heat pumps or V2G on a site above 50 kW, and 1 MW and over, which is Type B.
Before installation
- Cover letter
- ENA Standard Application Form
- Manufacturer's Compliance Verification Report, for partially type tested kit
- G100 Form A, where export is limited
- Single line diagram
- Site boundary map
- Letter of Authority
After commissioning
- Cover letter
- G99 Form A3-1
- The Standard Application Form, as installed
- G99 Form A2-4, for partially type tested kit
- G100 Form C, where export is limited
- Single line diagram, as installed
How it runs
A commercial application, step by step.
Above 50 kW the paperwork, the DNO's timescale and the commissioning all change. CLRD runs it the same way it runs every job, and tells you what's different at each step. A commercial application takes about ten minutes to send.
- 01
Enter the job
The same wizard as any job. Above 50 kW on a three phase supply it becomes a commercial job when you confirm it, and stays one: a change that crosses 50 kW later is a new job. Rows of identical inverters or batteries go in once, with a quantity.
What's different
No proposed installation date. The Standard Application Form doesn't want one.
- 02
Complete the Standard Application Form
A section on the job page asks what the form needs beyond the job itself: the application details, the generation owner if it isn't your client, and a popup for each different device, covering its ratings, its fault level contribution, and for a battery its storage and power swing figures.
What's different
Where CLRD holds a device's datasheet, its ratings are read in for you, and where it has read the device's G99 type test report, so is the fault level. Company numbers come from Companies House. You check them and complete the rest.
- 03
Generate and submit
Generate waits until the form is complete, then builds the pack: the cover letter, the Standard Application Form, the single line diagram drawn for a commercial supply, the site map and the Letter of Authority, with G100 Form A where export is limited and the manufacturer's report for partially type tested kit.
What's different
At SSEN it goes to their Major Connections inbox rather than the general applications address.
- 04
The connection offer
Every DNO group publishes the same standard: a connection offer within 45 working days of a complete application, or 65 where their own works reach high voltage. Their questions, and any change you make with Amend, stay on the job's own thread.
What's different
At this size the offer can carry charges and conditions. Read it before you accept.
- 05
Install and commission
What each operator publishes for commissioning at this size is shown on the job before you send the application, so you can plan for it from the start.
What's different
SSEN want 15 days' notice and attend the test. UK Power Networks want a test programme 28 days ahead. They're likely to witness the tests above 100 kW, and will for partially type tested kit at any size, at a daily charge. Electricity North West charge to review the commissioning documents, want a G5 harmonics report and confirmation of an active front-end inverter with them, and won't let you switch on until they approve.
- 06
Notify
The commissioning notification answers the DNO's own thread: the A3-1, with its DNO witnessing declaration, and the Standard Application Form as installed behind it, with Form A2-4 for partially type tested kit, G100 Form C where export is limited, and the single line diagram as installed.
What's different
The as-installed form comes from the same job as the application, so the two agree without anything keyed in twice.
Domestic vs commercial
Same engine. A different process.
| Up to 50 kW | Above 50 kW, to 1 MW | |
|---|---|---|
| The application | G99 Form A1-1 | The ENA Standard Application Form |
| Each device | Its ENA register reference | Ratings and fault level per device, plus storage and power swings for a battery |
| Proposed installation date | Asked, 10 working days to 3 months out | Not asked |
| Where it goes | The DNO's applications inbox | The same, except at SSEN: their Major Connections inbox |
| The DNO's answer | Usually weeks | Within 45 working days, or 65 with high voltage works |
| Commissioning | Your tests, your declaration | Notice to the DNO, who may attend or review |
| After commissioning | G99 Form A3-1 | A3-1 with the form as installed behind it |
In practice
What changes on the next job.
One entry, both forms
The application and its as-installed version come from the same job, so they agree.
Nothing required left out
Generate waits until the details the form needs are in, so it doesn't go to the DNO short.
Partially type tested kit
The manufacturer's report goes with the application, and Form A2-4 follows at commissioning.
The right diagram
Drawn from the main LV switchboard, with the protection relay and CT metering where fitted.
Same engine
The rules that route a 4 kW job route a 400 kW one. Nothing is chosen by hand.
Export limits included
G100 Forms A and C are added wherever the job limits export.
Before & after
The Standard Application Form, with CLRD and without.
Questions
Commercial applications, answered.
When do I need the Standard Application Form?
How long does the DNO take to make an offer?
Can I include an EV charger or heat pump?
Will the DNO attend the commissioning?
Can I change the job to below 50 kW later?
Got a commercial job above 50 kW?
Put your next commercial job in, or book twenty minutes and we'll do it with you.