MCS standards

MCS solar standard tightens again with MIS 3002 issue 6.0, worth asking any installer quoting a CT11 flat-roof job

MIS 3002 issue 6.0, available for reference from 18 March 2026, is the latest update to the MCS Solar PV Installation Standard, and every recent revision in this cycle has moved toward stricter documentation and mounting requirements, not fewer.

29 July 2026 · Source: MCS (mcscertified.com)

The pattern across the last few MCS revisions is consistent enough to call a direction of travel: issue 6.0 tightens documentation and design requirements rather than simplifying them, continuing from the 2025 update that already introduced flat-roof mounting rules and DC circuit changes. Anyone expecting MCS paperwork to get lighter over time on an install anywhere in Ramsgate, Broadstairs and Pegwell should recalibrate that expectation.

One specific, dateable change worth flagging directly for the harbourside terraces and the streets running up from Pegwell: from 10 August 2025, any solar system installed on a flat roof must use a mounting system that is itself MCS 012 certified, not just an MCS-certified installer using an uncertified mount. That's a real gap some installers have been caught out by, since it applies to the hardware, not only the workmanship, and it's worth confirming explicitly with any installer quoting a flat-roof job locally.

The wider electrical backdrop matters too. BS 7671 Section 712, the wiring regulations chapter underpinning MCS electrical compliance for solar specifically, was extensively revised under the A4:2026 amendment, covering earthing arrangements, DC isolation and fault protection for PV systems. An amendment of this scope changes what a compliant install actually looks like on the ground, not just the paperwork behind it.

Watch how certification bodies handle the migration. MCS describes issue 6.0 as part of a broader scheme redevelopment rolling through 2026, with certification bodies migrating installers in a phased approach rather than all at once, so a legitimate MCS installer quoting today may still be certified to issue 5.0 depending on where their certification body is in that migration. If you're getting quotes for a Ramsgate rooftop install, it's a fair question to ask which issue an installer currently holds certification against.

Read the original: MCS (mcscertified.com). Commentary is Ramsgate Solar's own editorial view; the original reporting is credited to its publisher.

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