Part of the Renewable Energy Installer Software Guide
Renewable Energy Updated May 2026 7 min read

MCS Redeveloped Scheme 2026: What Your Installer Software Needs to Change

MCS, the UK's quality mark for small-scale renewable energy installations, is replacing its previous certification model with a redeveloped scheme rolling out through 2026. The changes affect how installers are assessed, what documentation they must maintain, and what financial protection they must provide. If your software handles MCS compliance, it needs updating. If it does not handle MCS compliance at all, you are doing it manually, and now is a good time to stop.

2026
Phased rollout of redeveloped scheme
3 years
Assessment interval for clean-record installers
30 days
MCS certificate creation window (redeveloped scheme)

What Is Changing

The redeveloped scheme replaces the previous one-size-fits-all certification model with a framework that MCS describes as "simpler, outcome-focused, and more directly accountable to consumer protection standards." The key changes:

Risk-based assessments

Under the previous scheme, every installer faced the same assessment schedule regardless of track record. Under the redeveloped scheme, installers with a clean record (no non-conformities, stable business operations, no upheld complaints) may only require a site assessment every three years rather than annually. For well-run businesses, this is a significant reduction in compliance burden and cost.

The software implication: your system needs to maintain a clean, auditable record of every installation, every certificate, and every customer interaction. The benefit of risk-based assessment only materialises if your documentation is complete and searchable. A missed certificate or a gap in your records could trigger more frequent assessment.

Mandatory financial protection

Every installer must provide an MCS-approved financial protection product to customers for every installation. This is not optional. The product protects the consumer if the installer ceases trading or fails to honour warranty obligations.

Your software needs to track which financial protection product applies to each installation, record the policy details, and ensure the customer receives documentation as part of the handover pack.

Outcome-focused standards

The redeveloped scheme shifts emphasis from process compliance (did you follow the checklist?) to outcome compliance (does the installation perform as specified?). This means performance monitoring data, commissioning records, and post-installation validation become more important in the documentation trail.

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What Your Software Needs to Handle

  • MCS certificate generation and submission within the 30-day creation window per installation (extended from the previous 14-day window). Late submissions create non-conformities that affect your assessment frequency.
  • Financial protection tracking per installation, with policy numbers, provider details, and customer notification records.
  • Handover pack generation including performance estimates, commissioning data, warranty information, financial protection documentation, and user manuals.
  • Warranty register tracking warranty terms, expiry dates, and any warranty claims across your install base.
  • Complaint tracking with outcome recording. Under risk-based assessment, upheld complaints directly affect your assessment schedule.
  • G98/G99 DNO documentation for grid-connected installations, including single-line diagrams and connection applications.
  • BS 7671 compliance records for electrical installations.
  • BUS grant documentation for heat pump installations claiming under the Boiler Upgrade Scheme.

Which Platforms Are Ready

PlatformMCS Certificate TrackingFinancial ProtectionHandover PacksNotes
PayacaYes (built-in)Manual trackingPartialOnly dedicated UK clean tech platform. Handles MCS proposals out of the box.
IAA E2E PlatformYesYesYesFree for IAA members. Built specifically for MCS compliance, both current and redeveloped.
PylonNoNoPartialSolar design and proposal tool. Not a compliance platform.
OpenSolarNoNoNoFree solar design tool. No UK compliance features.
Jobber / SimPRONoNoNoGeneric field service tools. MCS compliance is entirely manual.
The gap is clear: only Payaca and the IAA E2E platform handle MCS documentation natively. Every other platform requires manual processes for certificate submission, financial protection tracking, and handover pack generation. If you are running 50+ installations per year, the manual overhead is significant.

The Bespoke Option for Larger Installers

For installation businesses doing significant volume (100+ installations per year, multiple teams, both solar and heat pump work), the gap between what generic platforms offer and what MCS compliance actually requires creates a strong case for a bespoke system.

A system built around your specific workflow can automate the entire MCS compliance chain: from survey through design, installation, commissioning, certificate submission, financial protection assignment, handover pack generation, and warranty tracking. It can also handle BUS grant documentation, DNO applications, and post-installation performance monitoring in one place rather than across three or four separate tools.

The MCS Redeveloped Scheme rewards clean records with reduced assessment frequency. A system that ensures nothing falls through the cracks directly affects your bottom line by keeping you in the lowest assessment tier.

Speak to us about renewable energy installer software · +44 7494 618 651 · Mon to Fri, 9am to 6pm