Reonic is a German solar and heat pump planning tool. Its strength is design: roof planning, a 150,000+ component database, and heat load calculation with LiDAR room scans. Its website also lists CRM, a field app and invoicing, built around a German back office, with bank-transfer invoices and Lexware, sevDesk and Bexio for the accounts.
Payaca is the UK-built system the whole job runs on: the CRM, the project pipeline, the field app, the DNO application, the purchase orders and the invoice sit on one record, with design built in. Here's how they compare for a UK install business.
The short answer
Reonic is a design and planning tool first. Choose Payaca if you want the whole job run on one record: G98 and G99 applications submitted through ENA Connect from the job, online payments with Xero or QuickBooks, and solar design with Glow (limited release) or imports from the tools you already use.
- Payaca is best for UK businesses that need MCS certification, DNO applications via ENA Connect and BUS V5 evidence as part of the normal workflow.
- Reonic is best for businesses that want deep solar and heat pump design, including room by room heat load calculation and LiDAR room scans, a large component database and MCS paperwork in one planning-led platform.
- Payaca publishes its pricing: Growth, the standard plan for established install businesses, is £1,199/month. Current plans and eligibility are on the pricing page. Reonic does not publish pricing publicly.
Looking at this yourself?
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Feature comparison
| Feature | Payaca | Reonic |
|---|---|---|
| Origin & market | UK-built, one system designed for UK install businesses | German-built, with a UK version of the product |
| Industry focus | Solar, heat pumps, battery storage, EV chargers | Solar, heat pumps, battery storage, EV chargers |
| CRM & sales pipeline | CRM with enquiry forms, pipeline tracking, email and SMS automations, and reporting | CRM with contacts, custom boards and statuses, tasks, user roles, and Microsoft and Google calendar and email sync |
| Quoting & proposals | Branded multi-option proposals with e-signatures and customer portal | PDF and web proposals with variants, profitability analysis and digital signatures |
| Solar design | Glow (limited release) designs the roof, strings the panels and draws the wiring diagram, on the same project as the quote and install. Or import from EasyPV and OpenSolar | Built-in roof planning, module layout, shading simulation and wiring diagrams |
| Heat pump design | Flow (limited release) builds the heat pump estimate in Payaca, with room by room heat loss imported from Heatpunk or Spruce | Room by room heat load calculation, LiDAR room scanning, heat pump sizing and a sound check |
| MCS & DNO compliance | G98 and G99 applications filled in on the job and submitted through ENA Connect, with approvals tracked; MCS documentation and certificates | MCS paperwork tracker and handover pack, MCS performance estimate on UK proposals, DNO registration tracked on the job, and a compliance hub for audit evidence |
| Scheduling & job management | Map-based scheduling, resource allocation, and job management | Team and installation calendars, checklists and hand-over reports |
| Invoicing & payments | Built-in invoicing, online payments, and Xero and QuickBooks integration | Built-in deposit, progress and completion invoices, paid by bank transfer, with Lexware Office, sevDesk and Bexio connections and an accountant export |
| Field operations | Mobile app that works offline, with custom forms, photo capture and timesheets | iOS and Android app that works offline, with checklists, photos, voice memos and time tracking |
| Customer portal | Branded customer portal on your own sub-domain, for tracking, signing and payments | White-label customer portal with project status, documents, appointments and quote signing |
| AI | Agent Dave, the AI assistant built into Payaca, plus an MCP server for Claude and Cursor | AI chat, agents, a call agent and WhatsApp assistants |
| Component database | Your own catalogue at your prices; Glow adds panels, inverters and batteries with the manufacturer's datasheet attached | 150,000+ components from 2,000+ manufacturers |
Origin & market
UK-built, one system designed for UK install businesses
German-built, with a UK version of the product
Industry focus
Solar, heat pumps, battery storage, EV chargers
Solar, heat pumps, battery storage, EV chargers
CRM & sales pipeline
CRM with enquiry forms, pipeline tracking, email and SMS automations, and reporting
CRM with contacts, custom boards and statuses, tasks, user roles, and Microsoft and Google calendar and email sync
Quoting & proposals
Branded multi-option proposals with e-signatures and customer portal
PDF and web proposals with variants, profitability analysis and digital signatures
Solar design
Glow (limited release) designs the roof, strings the panels and draws the wiring diagram, on the same project as the quote and install. Or import from EasyPV and OpenSolar
Built-in roof planning, module layout, shading simulation and wiring diagrams
Heat pump design
Flow (limited release) builds the heat pump estimate in Payaca, with room by room heat loss imported from Heatpunk or Spruce
Room by room heat load calculation, LiDAR room scanning, heat pump sizing and a sound check
MCS & DNO compliance
G98 and G99 applications filled in on the job and submitted through ENA Connect, with approvals tracked; MCS documentation and certificates
MCS paperwork tracker and handover pack, MCS performance estimate on UK proposals, DNO registration tracked on the job, and a compliance hub for audit evidence
Scheduling & job management
Map-based scheduling, resource allocation, and job management
Team and installation calendars, checklists and hand-over reports
Invoicing & payments
Built-in invoicing, online payments, and Xero and QuickBooks integration
Built-in deposit, progress and completion invoices, paid by bank transfer, with Lexware Office, sevDesk and Bexio connections and an accountant export
Field operations
Mobile app that works offline, with custom forms, photo capture and timesheets
iOS and Android app that works offline, with checklists, photos, voice memos and time tracking
Customer portal
Branded customer portal on your own sub-domain, for tracking, signing and payments
White-label customer portal with project status, documents, appointments and quote signing
AI
Agent Dave, the AI assistant built into Payaca, plus an MCP server for Claude and Cursor
AI chat, agents, a call agent and WhatsApp assistants
Component database
Your own catalogue at your prices; Glow adds panels, inverters and batteries with the manufacturer's datasheet attached
150,000+ components from 2,000+ manufacturers
See it in Payaca
The real product, on our demo accounts.
The whole job in 100 seconds
Switching from Reonic
Your customers, contacts and projects come across from an export of your Reonic records, mapped to Payaca's customers and projects at the right pipeline stage, then imported through Payaca's import tooling. Proposals, design reports and other documents you want to keep can sit as files on the matching project.
For new jobs, design in Payaca with Glow (limited release), or keep using EasyPV, OpenSolar, Heatpunk or Spruce and import the designs. Guided onboarding comes with Growth and above, as a one-off £1,500. It covers mapping your workflow into Payaca, migrating the data and training the team.
Which is right for you?
Choose Payaca if
- You want design and the whole job in one system
- You want G98 and G99 applications submitted through ENA Connect from the job
- You want online payments and Xero or QuickBooks on the same record as the job
- You want software built in the UK for UK install businesses
Consider Reonic if
- Solar design and room by room heat load calculation in the same tool matter most
- You want a large built-in component database
- You want an MCS compliance hub for audit evidence alongside the design
Questions
What's the main difference between Payaca and Reonic?
Reonic is a German planning and quoting tool, built around design. Its website also lists CRM, a field app, invoicing and UK MCS paperwork. Payaca is built in the UK as the CRM, project management and field service system the whole job runs on, with solar design built in through Glow (limited release). The differences that matter most for a UK business are DNO submission from the job, payments and accounting, and how deep you need the design tools to go.
Which handles MCS and DNO compliance?
They handle UK compliance differently. Reonic's website describes a tracker for the MCS paperwork on each install, a handover pack (survey, deposit protection, DNO registration, commissioning, BUS voucher and certification), the MCS performance estimate on UK proposals and a compliance hub for audit evidence. Payaca submits G98 and G99 applications through its ENA Connect integration from the job record, tracks the approval in the background, and produces the MCS documentation and certificates alongside the commissioning and payment stages of the same project.
How do the design tools compare?
Both design the system. Reonic has roof planning, module layout, shading simulation and wiring diagrams, plus room by room heat load calculation with LiDAR room scans for heat pumps. Glow (limited release) in Payaca lays out the panels on the roof, strings them to the inverter, draws the wiring diagram and works the MCS estimate, and Flow (limited release) builds heat pump estimates. Glow's design sits on the same project as the proposal, the DNO application, the install and the invoice. If you prefer EasyPV, OpenSolar, Heatpunk or Spruce, those designs import too.
Which is better for growing a UK installation business?
Reonic is the stronger pick if design depth, heat load calculation and a large component database are what you need most. Payaca is the stronger pick if you want the job itself run in one UK system: online payments and Xero or QuickBooks on the same record as the job, DNO applications submitted from the job, and the freedom to keep designing in the tools you already use. OVO Solar & Heating runs 16 franchises on Payaca.
Competitor details are based on their public information as of 29 October 2026. Spotted something out of date? Tell us.