Can plug-in solar physically push power to the grid?

Yes, in principle. A grid-tied microinverter synchronises with the mains, so if the panels generate more than your home is using at that moment, the surplus flows back through your connection towards the grid. The question is not whether it can flow, but whether you are paid for it.

What is self-consumption?

Self-consumption is the electricity you use in your home at the same moment it is generated. It is where the real value of a small system lies, because it directly offsets electricity you would otherwise buy. Only what you do not use is exported.

Guide

Can plug-in solar export to the grid?

Why surplus power can flow to the grid, why self-consumption matters most, and why a self-installed plug-in system may currently earn nothing for export.

Written and edited by Christopher Panteli

Last reviewed 3 August 2026

Christopher is the founder and editor of MyPlugInSolar. He oversees the site’s research standards, data tools and editorial process. He is not an electrician or solar installer, and specialist technical claims are sourced from official documentation or reviewed by appropriately qualified professionals.

It is a fair question: if a plug-in solar system makes more electricity than your home needs in a given moment, where does the extra go? The short answer is that, physically, a grid-tied system can send surplus power back towards the grid. The longer answer is that being able to export and being paid for export are two different things — and for a self-installed plug-in system today, export may earn nothing.

Self-consumption comes first

When the panels generate electricity, your home uses it first. If the fridge, router and anything else running at that moment add up to more than the panels are producing, you simply draw the difference from the grid as usual. This is self-consumption, and it is where a small system earns its keep, because every unit you use as it is generated is a unit you do not have to buy.

Then comes export

If at any moment the panels produce more than the home is using, that surplus has to go somewhere. A grid-tied microinverter is synchronised with the mains, so the excess flows back through your connection towards the grid. Generation connected to the network is normally notified to the distribution network operator under the relevant engineering recommendation. So export can happen — but whether you receive anything for it is a separate matter.

Why export may earn nothing

Being paid for exported electricity normally depends on two things: eligible export metering, and participation in a scheme such as the Smart Export Guarantee, which usually expects a certified installation. A self-installed plug-in system may have neither, in which case any surplus it sends to the grid is effectively given away. That is why we treat export income as zero by default, and why it is wise to plan around self-use rather than export earnings.

Legal to use in Great Britain since 27 August 2026

Plug-in solar has been legal to use in Great Britain since 27 August 2026, when SI 2026/848 came into force alongside Ofgem-approved changes to the G98 connection code — provided the kit is listed as compliant on the ENA Type Test Register. Northern Ireland is not covered. The DESNZ consultation closed on 30 June 2026 and the Government response was published on 16 July 2026. See the legal status for the full picture and sources.

What might change

How export, metering and scheme participation should work for plug-in systems is among the points the Government consultation may consider. Unless you have a confirmed export tariff, the sensible assumption is that a plug-in system earns nothing for export, so its value comes from offsetting daytime background use. For more on whether the SEG could ever apply, see our guide to the Smart Export Guarantee.

Frequently asked questions

Can plug-in solar physically push power to the grid?: Yes, in principle. A grid-tied microinverter synchronises with the mains, so if the panels generate more than your home is using at that moment, the surplus flows back through your connection towards the grid. The question is not whether it can flow, but whether you are paid for it.
Why might a plug-in system earn nothing for export?: Export payments normally require eligible metering and participation in a scheme such as the Smart Export Guarantee, which usually expects a certified installation. A self-installed plug-in system may meet none of these, so any surplus it exports can currently earn nothing.
What is self-consumption?: Self-consumption is the electricity you use in your home at the same moment it is generated. It is where the real value of a small system lies, because it directly offsets electricity you would otherwise buy. Only what you do not use is exported.
Could the rules change?: Possibly. Plug-in solar has been legal to use in Great Britain since 27 August 2026, when SI 2026/848 came into force alongside Ofgem-approved changes to the G98 connection code — provided the kit is listed as compliant on the ENA Type Test Register. Northern Ireland is not covered. How export and metering are handled is part of what is still being worked through, but nothing is confirmed.

Sources

1. Connecting generation to the network (G98 / G99) — Energy Networks Association
2. Smart Export Guarantee (SEG) — Ofgem
3. Plug-in solar consultation — Department for Energy Security & Net Zero

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