Integration partners

Design tools & UK schemes

Import PDFs from Heatpunk and Easy PV into your Flex Energi projects today. HIES, EPVS, Passiv energy data, and Stripe Connect customer billing are on the roadmap — so MCS, design data, schemes, and billing can live in one place.

Try free Get notified for upcoming integrations
Available now

Design tool integrations

Connect your Heatpunk and Easy PV accounts to pull survey and design PDFs straight into the right MCS project — fewer manual uploads, same compliance trail.

Available

Heatpunk

Air-source heat pump design

For ASHP projects in Flex Energi, connect your Heatpunk Pro API key and import PDFs from your remote Heatpunk projects into your compliance documents — without re-uploading everything by hand.

  • List projects and files from Heatpunk
  • Download PDFs into your Flex Energi project
  • Account owner configures the integration under Account → Integrations
Visit Heatpunk
Available

Easy PV

Solar PV design

For Solar PV projects, connect your Easy PV Pro API key and import PDFs from your Easy PV projects into Flex Energi — keeping surveys and layouts alongside your MCS pack.

  • List projects and files from Easy PV
  • Download PDFs into your Flex Energi project
  • Account owner configures the integration under Account → Integrations
Visit Easy PV

Pro subscription required: the Heatpunk integration needs an active Heatpunk Pro plan (team API access). The Easy PV integration needs an active Easy PV Pro plan. Each vendor sells its own subscription; Flex Energi does not include those products.

Roadmap

Coming soon

UK schemes, Passiv home energy data, and Stripe Connect billing will integrate with Flex Energi — one platform for MCS, consumer protection, validation, and customer energy billing.

Coming soon

HIES Consumer Code

Renewable Energy Installation Protection

HIES is a Chartered Trading Standards Institute (CTSI) approved Consumer Code covering renewable energy installations. Members benefit from deposit protection, Insurance Backed Guarantees (IBGs), and access to alternative dispute resolution.

  • Deposit & stage-payment protection
  • Insurance-backed guarantees
  • Alternative dispute resolution
  • Solar, heat pumps, batteries & more
Visit HIES
Coming soon

EPVS

Energy Performance Validation Scheme

EPVS is an independent certification standard that verifies processes used by installers — ensuring energy-saving, generation, and storage calculations and savings estimates are accurate, reliable, and based on approved methodologies.

  • Validates system designs & performance estimates
  • Protects consumers & lenders from mis-selling
  • Solar PV, heat pumps, battery, V2G & more
  • Trusted by major finance providers
Visit EPVS
Coming soon

Passiv

Home energy data for customer billing

Passiv monitors installed renewable systems at the home. Flex Energi will connect to Passiv so meter readings and usage data flow into Customer Billing — matching homes to properties and supporting accurate energy charges.

  • Sync readings from Passiv homes via API
  • Map Passiv Home IDs to Flex Energi billing profiles
  • Import, export, and solar/battery kWh fields for billing periods
  • Fewer manual CSV uploads for installer billing teams
Visit Passiv
Coming soon

Stripe Connect

Card payments for customer energy billing

Connect your Stripe account to Flex Energi so you can take card payments when billing customers for exported or shared energy — scheduled monthly runs and on-demand charges, with payouts to your connected account.

  • Stripe Connect Standard — your business receives payouts
  • Save customer cards securely for recurring energy billing
  • Automated monthly billing and manual Bill now charges
  • Charge history, credits, and balance visibility in Flex Energi
Learn about Stripe Connect
Benefits

Why integrate with Flex Energi?

Bring design files and — soon — scheme workflows into one MCS project record: less admin, fewer tools, clearer compliance.

Single source of truth

Heatpunk and Easy PV imports today; HIES, EPVS, Passiv, and Stripe on the roadmap — MCS, billing, and partner data in one place instead of juggling spreadsheets and portals.

Less paperwork

Pull PDFs from design tools automatically; when scheme and billing integrations land, streamline registrations, Passiv data sync, and card charges in the same flow.

Consumer confidence

Accurate documentation from design through to certificate — and future HIES, EPVS, Passiv, and Stripe alignment alongside MCS for customers and lenders.

Stay in the loop

Heatpunk and Easy PV integrations are available in Flex Energi now (with Heatpunk Pro and Easy PV Pro respectively). We'll notify you when HIES, EPVS, Passiv energy data, and Stripe Connect billing go live — in the meantime, try Flex Energi for free.

Start free trial Contact us