The regulatory journey that ends with plug-in solar kits on Lidl shelves is longer and more convoluted than the press releases suggest. Understanding it matters, because several steps in the process are still incomplete and the timeline is tighter than most buyers realise.

Step 1: The G98 distribution code update

Distribution Network Operators manage the UK electricity network. G98 is the technical standard governing how small generators connect to it. In late 2025, the Energy Networks Association updated G98 to explicitly accommodate plug-in solar systems under 800W — defining notification requirements and removing ambiguity about whether plug-in generation needed to be treated like a rooftop solar system. Quiet but essential.

Step 2: BS 7671 Amendment 4

Published April 2026. Updated the IET Wiring Regulations to permit sub-800W plug-in solar on standard 13A sockets without an electrician. Chapter 702 added rules for electrical energy storage. Chapter 708 updated the generation connection framework. Plug-in solar moved from regulatory grey area to fully permitted activity — subject to Step 3.

Step 3: The BSI product standard (pending July 2026)

The British Standards Institution is developing the product standard that defines what a 'certified UK plug-in solar kit' actually is. The testing requirements, safety certifications, and UKCA marking criteria manufacturers must meet before retailers can legally sell kits as plug-and-play consumer products. Expected publication: July 2026. EcoFlow's STREAM is already UKCA certified and will meet the standard when published — but the standard doesn't formally exist yet.

Step 4: Smart Export Guarantee for plug-in solar (pending)

Currently, plug-in solar owners who export to the grid don't get paid for it — SEG requires MCS certification, which self-installed plug-in solar doesn't have. Ofgem is reviewing SEG eligibility for self-installed plug-in systems. When this arrives — likely 12–18 months after the BSI standard — the financial case for plug-in solar improves materially without any change to the hardware.

Where we are

Steps 1 and 2 are complete. Step 3 is in progress. Step 4 is under review. The regulatory framework is functional but not complete. Buy now if you're comfortable with the current position. The trajectory is clear.