Plugged in your solar kit? There is one more step: telling your local network operator that it is there. Until this year that meant G98 paperwork, usually handled by an installer. Since 27 August 2026, owners of an ENA-listed plug-in solar kit can do it themselves, online, free, in about five minutes, at myplugin.solar. Or, if Thunder installs your kit, we do it for you.
This guide explains what myplugin.solar is, what changed, how to register step by step, and what to do in the less common cases, such as moving home or already having rooftop solar.
What is myplugin.solar?
myplugin.solar is the national registration site for plug-in solar in Great Britain. It is run by the Energy Networks Association (ENA), the body that also publishes the G98 connection rules and runs the Type Test Register that every plug-in kit must pass. When you register, the ENA passes your notification to the network operator that supplies your home. You do not need to know who that is.
Why you need to register
A plug-in solar kit is small, but it is still generation connected to the grid. Your network operator needs to know where generation is connected so it can plan and maintain the network safely. That is why every compliant kit must state that notifying the network operator of both connection and disconnection is mandatory.
Registering is a notification, not a request for permission. You do not wait for approval before you plug in.
From G98 forms to five minutes online
G98 is the network rule for small generators. Under the old process, an installer filled in a G98 form for your network operator, each operator had its own forms, and some only accepted forms from installers. Ofgem approved a change to G98 on 11 August 2026, which took effect on 27 August, the day plug-in solar became legal:
| Before 27 August 2026 | Since 27 August 2026 (plug-in kits) | |
|---|---|---|
| Who notifies | Usually an installer | You can, as the customer |
| How | G98 forms sent to your own network operator | One national site: myplugin.solar |
| Extra installer steps | Including a photo of the cut-out and a loss-of-mains check | Not needed for plug-in kits |
| Which devices | Type-tested equipment, wired in | Only complete kits listed Compliant on the ENA register |
| How many | Up to 16A per phase in total | One plug-in device per household, within 16A per phase in total |
Permanently wired systems, such as rooftop solar and home batteries, still follow the standard G98 or G99 process through an installer.
How to register, step by step
Before you start, have ready:
- an email address you can check straight away;
- the postcode and address where the kit is installed;
- the exact make and model from your kit's label. For a Thunder kit, search "Thunder" and choose your Bolt model.
- Verify your email. Enter your email address and type in the one-time code you are sent. Check your spam folder if it does not arrive.
- Confirm your address. Enter your postcode and select your address from the list.
- Select your device. Search for your kit by manufacturer or model and select it. Only kits listed Compliant on the ENA register appear.
- Review and submit. Check your details and submit. The ENA sends the notification to your network operator.
There is no account to log back into, so save a screenshot of the confirmation screen and keep any confirmation email with your kit's paperwork. It is useful if your insurer, landlord or a future buyer asks.
When to register
Register once your kit is plugged in and working. The G98 rules give 28 days from the day a generator is first connected, but it only takes about five minutes, so it is simplest to do it the same day. Registration is free, and you do not need your meter number (MPAN) or an account.
The updated network rules also ask for a warning label near your consumer unit or electricity meter, so anyone working on your electrics knows a plug-in kit is connected. If you are not sure where yours should go, ask us.
Special cases
Moving home. Take your kit with you and register it again at your new address. There is no account to transfer, so the new address is a new registration.
Replacing your kit. Register the new device through the same process.
Removing your kit for good. Compliant kits must tell you that disconnection should be notified too. No online form for this exists yet, so email your network operator with your address, the device and the date it was removed, and keep the reply.
Already have rooftop solar? A plug-in kit can sit alongside wired generation as long as the total stays within 16A per phase, roughly 3.68kW. Guidance on this is still settling, so check with your network operator in writing before you plug in, and keep the reply.
Your kit is not in the list. It may still be under assessment, so check again in a few days. Only kits listed Compliant can be selected, and inverters on their own are not accepted: the whole kit is assessed. A kit that never appears is not on the plug-in route and needs a fixed connection by an electrician.
Northern Ireland. myplugin.solar covers England, Wales and Scotland. Northern Ireland has its own rules; follow NIE Networks' guidance.
What registration does not do
- It is not permission. You notify; nobody approves.
- It does not set up export payments. Plug-in solar is generally not paid for exported electricity, so savings come from the power you use at home.
- It does not cover batteries. A home battery is a fixed installation, and your installer notifies your network operator for it. See our guide to adding a battery to plug-in solar.
Let Thunder handle it for you
Every Thunder Bolt kit is listed Compliant on the ENA register, so it appears in the myplugin.solar device list: Bolt 460W (THUNE/21203/V1), Bolt Max 530W (THUNE/21751/V1/A1) and Bolt 920W (THUNE/21204/V1). Choose professional installation, available anywhere in England from £399.99, and registration is included: our team mounts the panels, connects the kit, fits the warning label and registers it at myplugin.solar for you. Nothing to remember, no forms, no deadlines.
New to plug-in solar? Start with whether plug-in solar is legal in the UK, read what the law actually says, or compare Thunder's plug-in solar kits.
Frequently Asked Questions
Do I need to register plug-in solar?
Yes. A plug-in solar kit is grid-connected generation, so your network operator must be notified. For an ENA-listed kit in England, Wales or Scotland, you do this yourself at myplugin.solar.
Is myplugin.solar free?
Yes. Registering your kit costs nothing and takes about five minutes. If Thunder installs your kit, we register it for you as part of the installation.
How long do I have to register?
The G98 rules give 28 days from the day the kit is first connected. The simplest approach is to register on the day you plug it in.
Do I still need a G98 form?
Not for an ENA-listed plug-in kit. Since 27 August 2026, registering at myplugin.solar replaces the G98 form for plug-in devices. Wired systems, such as rooftop solar and batteries, still use the standard G98 or G99 process through an installer.
Do I need my MPAN to register?
No. You only need your email address, the address where the kit is installed and the model of your kit. The site passes your notification to your network operator.
Will Thunder register my kit for me?
Yes, when Thunder installs it. Registration at myplugin.solar is included in every Thunder installation, along with mounting, connection and the warning label. Book installation from £399.99, anywhere in England.
What happens if I move house?
Take your kit with you and register it again at your new address.
My kit is not on the list. What should I do?
Check again in a few days, as it may still be under assessment. Only kits listed Compliant on the ENA register can be selected. If it never appears, it cannot use the plug-in route and needs a fixed connection by an electrician.