MCS certification is not optional for UK solar installers who want their customers to access the Smart Export Guarantee, 0% VAT, or government incentives. Every installation produces a trail of documentation that needs to be generated correctly, stored securely, and retrievable for years. This article covers exactly what your software needs to do, and where the current options fall short.
Speak to us about solar installer software · +44 7494 618 651 · Mon to Fri, 9am to 6pm
The Microgeneration Certification Scheme is the quality mark that unlocks the UK renewables market. Without MCS certification, your customers cannot register for the Smart Export Guarantee (SEG) to earn from surplus solar generation. They cannot benefit from 0% VAT on domestic installations. And any future government incentive scheme will almost certainly require MCS as a prerequisite.
In 2025, there were 267,032 MCS-certified solar PV installations in the UK, smashing the previous record set in 2011 by 31%. Over 4,000 contractors are now MCS-certified for solar PV alone. With that volume of installations, the documentation burden is significant, and it scales linearly with every job you complete.
Each solar PV installation requires:
On top of per-installation documentation, MCS requires every certified installer to maintain a Quality Management System (QMS). This is a set of processes demonstrating how you control the quality of installations. Records must be backed up electronically, stored off-site or in the cloud, and accessible to everyone involved in delivering installations.
The requirements above translate into specific software capabilities. Most installers currently cobble these together from multiple tools. Here is what a proper system handles in one place.
Your software needs to produce a customer-facing performance estimate that shows expected annual generation in kWh, based on the specific system configuration, roof details, and location. This is not a generic figure. MCS expects the estimate to reflect the actual design you are proposing. The software should pull from design data (panel wattage, orientation, tilt, shading losses) and produce a formatted document the customer can review before signing.
Commissioning is where most documentation gaps appear. The installer on-site needs to record meter readings (generation meter serial number and reading, both before and after), electrical test results, and visual inspection outcomes. This data needs to reach the office quickly so the MCS certificate can be issued within the 10-day deadline.
A good system provides a mobile form that the installer completes on-site, with mandatory fields that prevent submission until all required data is captured. Photos are uploaded directly against the installation record, not sitting in someone's phone gallery waiting to be transferred.
The MCS certificate must be issued within 10 days of commissioning. Your software should track this deadline, alert the office when it is approaching, and ideally generate the certificate data in a format ready for submission to the MCS Installation Database. Late submissions risk non-conformance.
The handover pack is not a single document. It is an assembly of multiple documents: the MCS certificate, a signed declaration from the installer, warranty details from the panel and inverter manufacturers, a maintenance schedule, system specifications, commissioning data, and your contact information. Assembling this manually in Word for every installation is slow and error-prone.
Software should assemble the handover pack automatically from data already in the system. The design specification, the commissioning record, the certificate, and the warranty details are all generated during the project workflow. The handover pack should be a compiled output, not a manual assembly job.
MCS expects photo documentation of each installation. This includes before-and-after meter readings, the installed panel array, inverter placement, electrical connections, and labelling. Photos need to be linked to the correct installation record, not dumped in a shared folder where nobody can find them six months later when an auditor asks.
Beyond individual installation records, MCS requires a functioning Quality Management System. This means documented processes for how you manage installations, evidence of staff competency (including your Nominated Technical Person), complaint handling records, and a system for identifying and correcting non-conformances.
Your software should maintain these records as a natural output of daily operations, not as a separate paperwork exercise you do before an audit. If every installation follows a defined workflow in the system, and every exception is logged, your QMS records are already being generated.
MCS compliance is only half the picture. A solar installation business also needs to manage the operational workflow that surrounds each job.
Leads arrive from multiple sources: your website, social media, lead generation platforms, word of mouth, and manufacturer referral programmes. Each lead needs to be captured, qualified, and moved to a site survey. The software should track lead source so you can measure which channels deliver actual signed contracts, not just enquiries.
The site survey captures the data that feeds the system design: roof dimensions, orientation, pitch, shading objects, structural condition, existing electrical installation, and consumer unit capacity. This data needs to flow into the design process (whether that happens inside your system or in a connected tool like OpenSolar or EasyPV) without manual re-entry.
The system design produces a bill of materials and a performance estimate. These feed the quotation, which needs to include itemised hardware costs, labour, scaffolding, VAT treatment (0% for domestic energy-saving materials under current rules, confirmed until at least March 2027), optional finance terms, and a clear acceptance mechanism.
Once the customer signs, the project enters the installation pipeline. This means scheduling a crew, ordering equipment, submitting a DNO notification (required for grid-connected systems), and confirming the installation date with the customer. The software should show the office a clear view of upcoming installations, crew availability, and equipment procurement status.
The installation triggers the commissioning workflow described above. After commissioning, the handover pack is assembled, the MCS certificate is submitted, warranty registrations are completed with manufacturers, and the customer receives their documentation. The SEG registration process can also be initiated at this point.
Solar PV systems carry manufacturer warranties of 10 to 25 years on panels and 5 to 12 years on inverters. Your system needs a warranty register that tracks what was installed, when, and what warranty terms apply. Scheduled maintenance reminders and a mechanism for logging faults or customer queries complete the aftercare workflow.
The UK market for solar installer software is fragmented. Here is an honest assessment of the gaps.
Payaca (£299 to £1,199/month) is the most complete dedicated platform for UK clean tech installers. It handles CRM, MCS-compliant proposals, scheduling, invoicing, and integrates with design tools. The limitation is cost. At £299/month for the Core plan, a small installer doing 10 jobs a month is spending £30 per job on software before any other tools. The Growth plan at £1,199/month is positioned for larger operations but represents a significant ongoing commitment.
OpenSolar (free core platform) is excellent for solar design, performance simulation, and proposal generation. But it is a design tool, not a project management system. It does not handle scheduling, commissioning workflows, handover pack assembly, or warranty management. You still need something else to run the business.
Pylon (£4 to £10/project) offers affordable solar design and proposals on a pay-per-project basis. The CRM add-on starts at $49/user/month. It is cost-effective for design work but does not cover the full installation workflow or MCS compliance documentation.
Generic field service tools (Jobber, SimPRO, Commusoft) handle scheduling, invoicing, and customer communication well. They know nothing about MCS compliance, solar design, performance estimates, or handover pack requirements. You can use them for the operational side but still need separate tools for everything renewable-specific.
The result: most UK solar installers run two to four separate tools, plus spreadsheets for the gaps. Data gets entered multiple times. Documents get assembled manually. And compliance depends on the diligence of individual staff members rather than being enforced by the system.
Speak to us about solar installer software · +44 7494 618 651 · Mon to Fri, 9am to 6pm
A bespoke system built specifically for your solar installation business eliminates the fragmentation. Every step from lead to aftercare lives in one system. Data entered at the survey stage flows through to the design, the quote, the project plan, the commissioning record, the handover pack, and the warranty register.
MCS compliance becomes a byproduct of doing the work, not a separate administrative task. When your installer completes the commissioning form on their phone, the system automatically checks that all required fields are populated, flags any missing photo evidence, calculates whether the 10-day MCS certificate deadline is at risk, and begins assembling the handover pack.
You own the system outright. Your compliance records, customer data, and installation history are not locked inside a third-party platform. They live on infrastructure you control, backed up and protected, accessible for the full 25-year warranty period if needed.
A core system covering lead management, quoting, project tracking, MCS documentation, commissioning workflows, handover packs, and warranty management typically costs £8,000 to £18,000 as a one-off build. That is less than three years of Payaca's Core plan, and you own it permanently.