- MCS is continuing to investigate the causes of the issues and to identify a resolution.
- Grace period remains in place for solar mounting products until 10 November 2025.
- Clause 5.5.5 of MIS 3002 remains in place for the use of flat roof installations until further notice.
Following the issues previously identified with solar mounting product certification and flat roof solar PV mounting, we wanted to provide an update on our ongoing work towards a resolution.
Solar mounting certification
On 10 May 2025, certification was withdrawn from a number of solar mounting products. In response, MCS opened an investigation into the differences in approach taken by Certification Bodies (CBs) in relation to these products.
MCS has engaged with both manufacturers and CBs to understand the sequence of events and decision-making processes that led to the withdrawal of product certificates. The purpose of our ongoing investigation is to assess whether greater consistency can be achieved across CBs in the testing of solar mounting products.
While this investigation is underway, a grace period remains in effect until 10 November 2025, during which installers may continue to use solar mounting products that previously held certification. All affected products are clearly marked in the MCS Product Directory with the label “GRACE PERIOD” after the certification number, and certification dates displayed as 10/05/2025 to 10/11/2025.
MCS will continue to engage with stakeholders and will provide further updates once the investigation reaches its conclusion.
Flat roof Solar PV mounting
The release of Version 3 of the MCS 012 Solar Mounting Product Standard extends its scope to include both mechanically attached and non-mechanically attached systems designed for flat roofs with a pitch of ≤10°. We had been made aware of challenges associated with achieving certification for these types of systems.
To explore solutions, MCS recently hosted a workshop with manufacturers and CBs to understand the challenges associated with the certification of flat roof mounting kits, where it was agreed to undertake research into the approach adopted in other countries to support certification for these products.
The outcome of this work is expected to inform discussions at the next Solar Mounting and Solar PV Working Group meetings.
Installers may continue to rely on clause 5.5.5 of the Solar PV Installation Standard (MIS 3002) for the installation of non-certified flat roof mounting kits until:
- These challenges have been resolved with the relevant CBs
- And there are enough flat roof mounting kits that have secured certification for installers to choose from