NICEIC began transitioning businesses to the redeveloped MCS Installer scheme on 9 March 2026, the certification body has said. NICEIC was approved to deliver the redeveloped scheme on 23 February 20261. The Microgeneration Certification Scheme is described by NICEIC as a nationally recognised quality assurance scheme for small-scale renewable energy installations, including solar panels, solar heating, heat pumps and battery storage1.
From 9 March, all new applicants are automatically assessed under the redeveloped scheme, and NICEIC will contact businesses with applications already in progress to move them across1. Existing MCS Approved Installers will be invited by email to transition over the coming months, on a phased basis. NICEIC said it expects to have contacted everyone by June 20261.
The redeveloped scheme retains the existing technical requirements for how systems are designed and installed, but moves contractual elements out of the MCS Installation Standards into separate Pre-sale Information and System Performance Estimate Standards1. New core documents include Installer Operating Requirements, a Customer Commitment and Conformity Assessment Guidelines1. NICEIC states that the Customer Commitment must be given to a customer at the first point of contact and before entering into a contract1.
"The updated scheme focuses more on installation quality and protecting the consumer, and less on administrative requirements."
Consumer Code membership is no longer mandatory, though NICEIC notes it may still be required when claiming certain government funding, such as vouchers under the Boiler Upgrade Scheme. MCS will manage consumer complaints centrally and will contact all customers who have had an installation completed by a certified installer. Installers will need to purchase an approved MCS financial protection product1.
Assessment moves to a risk-based model, with frequency set by a calculation covering business scenario, installation numbers, years certified, complaints and previous assessment outcomes. New contractors remain on the standard surveillance schedule for at least two years1. Other changes include a 30-day certificate creation window rather than 10 days, a new licensee role, and the renaming of the nominee as main contact and the technical person as technical supervisor1. Installers will hold a new Installer Agreement directly with MCS and have a dedicated MCS account manager1.
| Change | Before | After |
|---|---|---|
| Consumer Code membership | Mandatory | No longer mandatory, may be needed for some funding1 |
| Certificate creation window | 10 days | 30 days1 |
| Assessment frequency | Standard schedule | Risk-based calculation1 |
| Installer agreement | Via certification body | Held directly with MCS1 |
Why it matters for households
The scheme is the route by which installers of solar panels, solar heating, heat pumps and battery storage are certified, so its rules shape who can carry out work in a home and under what terms. The stated shift towards installation quality and consumer protection, and away from administrative requirements, is presented by NICEIC as a change in emphasis rather than in the technical standards themselves, which are retained1. For a household, the practical points reported are the pre-sale information that must be provided before a contract is signed, the central handling of complaints by MCS, and the requirement for installers to hold an approved financial protection product1. Membership of a Consumer Code is no longer mandatory, which means the consumer protection arrangements attached to a given installer may differ from those in place before, and NICEIC notes that some government funding still requires it1. The standards bodies that write and enforce these requirements are unchanged in role, but the assessment model applied to installers is not.
What happens next
NICEIC will contact existing installers by email with a short online transition form, and expects to have contacted everyone by June 20261. New applicants are assessed under the redeveloped scheme from 9 March 20261. NICEIC said a further blog will explain how the transition works in practice and what installers need to prepare1. No date has been reported for completion of the transition beyond the June 2026 contact target.
Sources1 cited
- Redeveloped MCS Installer Scheme | NICEIC, niceic.com