What should a UK plug-in solar certification checklist cover?

Start by defining what is being placed on the market. The compliance file will be different for a PV module sold as a component, a grid-connected microinverter sold as electrical equipment, and a packaged plug-in solar system supplied with cables, a plug, mounting hardware and instructions.

1. PV module checklist

The panel is one part of the generating system. For procurement, record the exact model, revision and intended use rather than relying on a general statement such as “tested to IEC standards.”

• Exact module model and product revision
• Rated electrical characteristics and permitted operating conditions
• Construction details, materials and bill of materials
• Safety and performance test reports relevant to the target market
• Connector, cable and junction-box specifications
• Mechanical, fire and mounting limitations where applicable
• Serial-number or batch traceability
• Installation, handling, cleaning and maintenance instructions

If the panel is supplied with a fixed cable, connector or mounting component, identify whether that item is part of the tested module or is being added later. A change in cable length, connector type, adhesive, frame or mounting method may require a configuration review.

2. Microinverter and grid-interface checklist

The microinverter is normally the component that interfaces with the AC circuit and public network. Its evidence must be checked separately from the PV module.

• Manufacturer, exact model and hardware revision
• AC rated output, phase and operating voltage
• DC input range and permitted PV module configuration
• Anti-islanding and protective-function information
• Applicable electrical safety and EMC evidence
• Grid-code or network type-test reference
• Firmware version and change-control record
• Installation, isolation, monitoring and fault instructions

For Great Britain, the relevant G98 or G99 route depends on the generating equipment and connection circumstances. The exact inverter reference should be checked against the current ENA process and the local DNO requirements. Read the separate G98 for UK plug-in solar guide for the notification and installer workflow.

3. Complete plug-in solar system checklist

When panels, a microinverter, cables, plug and mounting components are sold together, assess the product as a defined configuration. The finished kit should be documented as the product the buyer will actually receive.

• System diagram showing DC and AC paths
• Exact panel-to-inverter compatibility
• Connector polarity and cable routing
• Plug, socket and isolation requirements
• Protection, earthing and overcurrent limitations
• Maximum number of modules and permitted arrangement
• Mounting, ballast, wind and structural limitations
• Indoor, outdoor, balcony, roof or vehicle installation boundaries
• Commissioning and shutdown procedure
• Warnings for shading, water ingress, heat, damage and unauthorised modification

Do not treat a kit as covered merely because each separate component has a certificate. The supplier should show how the components were selected, connected and documented as one product configuration.

4. What does the testing scope actually cover?

Every test report should be read for its scope, sample, model reference, test conditions, standard edition and result. The title of a report is not enough.

For a buyer or distributor, request the report summary and declaration documents, then ask for clarification when the exact model or configuration is not obvious. Do not infer coverage from a similar model number.

5. Technical file and conformity documents

A technical file should allow the manufacturer, importer or market-surveillance authority to understand what the product is, how it was designed, which requirements apply and how conformity was assessed.

• General product description and intended use
• Design drawings, circuit diagrams and component lists
• Risk assessment and identified safety controls
• List of standards or technical specifications applied
• Test reports and certificates with model references
• Declaration of Conformity or applicable declaration
• Production controls and serial-number traceability
• Instructions and safety information in the required language
• Change-control records for hardware, firmware and BOM changes
• Importer, manufacturer or authorised-representative details where required

For Great Britain, electrical equipment placed on the market may use the conformity route and marking permitted by the current product regulations. For Northern Ireland and the EEA, the applicable CE or CE-plus-UKNI rules can differ. Confirm the destination before finalising labels and declarations.

6. Product labels and packaging

Labels should identify the product and communicate the information needed for safe use and traceability. Marking requirements depend on the product category and destination market, so use a market-specific label review.

• Manufacturer name or registered trade name
• Product model and serial or batch reference
• Electrical ratings and polarity where applicable
• Conformity marking required for the destination market
• Relevant importer or responsible economic operator details
• Warnings, symbols and installation limitations
• Traceable production or date information where required
• Link or reference to instructions and declaration documents

Markings should be visible, legible and durable. If the equipment cannot reasonably carry the marking, the applicable rules may allow it on the packaging or accompanying documents. This must be confirmed against the current regulation for the specific product.

7. Installer and customer documentation

Certification evidence is only one part of a deployable product. The installer needs clear instructions for the actual site, and the customer needs a record that identifies the equipment and the connection route.

• Installation and commissioning instructions
• Wiring and connection diagrams
• Protection, isolation and shutdown instructions
• Mounting and structural limitations
• DNO notification or application information where applicable
• Exact inverter model and type-test reference
• Product manual, warranty terms and maintenance instructions
• Emergency contact and fault-handling information

The UK connection route should be checked against the current DNO and ENA instructions. A product document should not tell an installer to rely on an old register, generic approval or a different country’s grid code.

Common certification mistakes

1. Component substitution: Replacing the tested inverter, connector, cable or plug without reviewing the system file.
2. Certificate overreach: Using a PV module report as proof that the complete kit is certified.
3. Model ambiguity: Quoting a product family when the test covers only one exact model or revision.
4. Market mixing: Using GB, Northern Ireland, EEA or North American documents interchangeably.
5. Missing change control: Updating firmware or BOM items without checking whether the evidence remains valid.
6. Label gaps: Omitting ratings, traceability, responsible-operator details or required markings.
7. Installation assumption: Treating a product certificate as a substitute for site-specific electrical and structural checks.

Buyer checklist before placing an order

• What exactly is being certified: panel, inverter, kit or installation?
• Does every report list the exact model and revision?
• Are the supplied accessories included in the test scope?
• Is the intended UK market GB, Northern Ireland or both?
• Which conformity marking and declaration apply?
• Is the inverter reference verified through the current ENA process where relevant?
• Are the technical file, instructions and labels available for review?
• Who owns change control after the first shipment?
• Which documents will the distributor, installer and end customer receive?

Frequently asked questions

Final takeaway

A useful UK plug-in solar certification checklist follows the product from component to complete system. Verify the panel evidence, microinverter and grid-interface documents, complete-kit configuration, test scope, technical file, labels and installer package as separate but connected layers.

For B2B buyers and OEM brands, the goal is not to collect the largest number of certificates. It is to prove that the exact product being quoted and shipped is the product covered by the documentation for the intended UK market.

Official sources

• GOV.UK Electrical Equipment Safety Regulations guidance
• GOV.UK product marking by sector
• GOV.UK RoHS compliance guidance
• ENA Connect Direct