♻️ CleanTechOn TimeπŸ“‹ Fixed Price

CleanTech UK Heat Pump Installer SaaS -- MCS and BUS

UK6 min readUpdated June 2026
Region
UK
Contract
Fixed Price
Tech Stack
10 Technologies
IP
100% transferred

Project Overview

UK heat pump installer (280 MCS-certified installers, GBP28M revenue, 8,400 installations/year) needed unified...

Technology Stack

ReactReact Native (Expo)Node.js/FastifyPostgreSQLMCS APIDESNZ BUS APIEPC Register APIHERE Maps APIGOV.UK NotifyAWS eu-west-2

Compliance & Standards

MCS (Microgeneration Certification Scheme)BEIS/DESNZ BUSHMRC VAT 708/6RECCUK GDPRWCAG 2.1 AACyber Essentials
Step 01

The Challenge

UK heat pump installer (280 MCS-certified installers, GBP28M revenue, 8,400 installations/year) needed unified SaaS replacing Excel job scheduling, paper MCS certificates, and manual BUS voucher submissions. MCS, BEIS/DESNZ BUS (GBP7,500 voucher per installation), HMRC VAT (5% reduced rate), RECC, UK GDPR, WCAG 2.1 AA. Budget GBP90,000.

Step 02

Our Approach

MCS Certificate Generation

  • 1installation data capture (heat pump model, installer MCS number, system design -- heat loss calculation),
  • 2EPC verification (EPC Register API -- property must have EPC D+),
  • 3MCS API submission (installer submits, MCS issues certificate number),
  • 4customer notification (GOV.UK Notify -- MCS certificate PDF),
  • 5annual audit support (full installation history evidence).

BUS Voucher Automation

GBP7,500 per installation (air source or ground source).

Workflow

  • 1pre-installation voucher application (DESNZ BUS portal via API),
  • 2voucher issued (3 months validity),
  • 3installation completed,
  • 4voucher redemption (DESNZ BUS API -- MCS certificate + photos),
  • 5payment to installer (DESNZ pays GBP7,500). GBP7,500 x 8,400 = GBP63M annual vouchers managed.

Installer Job Scheduling

  • 1customer booking (website -- preferred date, property details),
  • 2surveyor appointment (heat loss assessment),
  • 3installation scheduling (2-day installation team allocation),
  • 4route optimisation (HERE Maps -- postcode cluster),
  • 5installer mobile app (React Native -- job details, MCS data capture, sign-off, photos).

HMRC VAT and RECC

5% reduced VAT rate (HMRC Notice 708/6 -- energy saving materials).

Automation

  • 1job type classification (heat pump qualifying vs non-qualifying accessories),
  • 2correct VAT rate applied,
  • 3automated invoice generation,
  • 4HMRC MTD VAT data from job invoices.

RECC compliance

cooling off period, cancellation rights documented.

Step 03

The Results

Platform live at 16 weeks, GBP84,000. 8,400 installations.

MCS automated.

BUS GBP63M vouchers digital.

Mobile app 100% adoption.

HMRC VAT 100%.

Survey-to-install 18.4 to 12.2 days.

NPS 84.

RECC zero complaints.

GBP63M BUS vouchers.

Each manual BUS voucher took 45 minutes.

Automated: 90 seconds.

We scaled from 4,200 to 8,400 installations per year without adding any admin staff. -- CEO, UK Heat Pump Installer

Project Details

Sector
CleanTech
Country
UK
Status
On Time
Contract
Fixed Price
Tech Stack
10 Technologies
Reading Time
6 min
IP Ownership
100% transferred
Last Updated
June 2026
Written By
ClickMasters Case Study Team
Reviewed By
James Whitmore, CTO

Related Case Studies

View All

Ready to Transform Your Business?

Let's discuss how our technical expertise can help you achieve remarkable results.