COMPARISONS

OpusFlow vs Optimal Sun Features Comparison

OpusFlow's features and community driven approach make it the best Optimal Sun alternative you can wish for.

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Find out how OpusFlow stacks up against Optimal Sun
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Why Switch?

When you look at OpusFlow alongside Optimal Sun, the key question becomes how much control you want over your entire installation process. OpusFlow gives you a central place to manage every stage of your workflow, from the first contact to final handover, so you always know what’s happening and what comes next. With everything connected and easy to follow, you can keep projects moving, support your team better, run and scale your business with far more confidence.

OpusFlow vs Optimal Sun
at a glance

The features that matter most to your business, compared side by side.

Optimal Sun

Unknown
Unknown

OpusFlow

€99
Per License
Fully Cloud-Based
Yes, native included
Yes, native included
User Management
Yes, native included
Yes, native included
Heat Pump Calculator
Not included
Yes, native included
Solar Design Software
No data available
Yes, native included
CRM
No data available
Yes, native included
Customer Portal
No data available
Yes, native included
Invoicing (Accounts)
Not included
Yes, native included
Purchasing & Stock
Not included
Yes, native included
Planning
Yes, native included
Yes, native included
Internal Dashboarding
No data available
Yes, native included
Internal Tickets & Chats
Not included
Yes, native included
Internal Forms & Site Survey Forms
No data available
Yes, native included
Document Management
Yes, native included
Yes, native included
Custom built & DIY automations for workflow
No data available
Yes, native included
Warehouse Management
Not included
Yes, native included
Project Management
No data available
Yes, native included
Battery Calculator
Not included
Yes, native included
AI Data Assistant
No data available
Yes, native included
Time Registrations
Not included
Yes, native included
Open API
Yes, native included
Yes, native included
Quotations
Not included
Yes, native included
Contract Management
Not included
Yes, native included

Optimal Sun

Unknown
Unknown

OpusFlow

€99
All-in-one Price
Fully Cloud-Based
Optimal Sun
OpusFlow
Yes, native included
Yes, native included
User Management
Optimal Sun
OpusFlow
Yes, native included
Yes, native included
Heat Pump Calculator
Optimal Sun
OpusFlow
Not included
Yes, native included
Solar Design Software
Optimal Sun
OpusFlow
No data available
Yes, native included
CRM
Optimal Sun
OpusFlow
No data available
Yes, native included
Customer Portal
Optimal Sun
OpusFlow
No data available
Yes, native included
Invoicing (Accounts)
Optimal Sun
OpusFlow
Not included
Yes, native included
Purchasing & Stock
Optimal Sun
OpusFlow
Not included
Yes, native included
Planning
Optimal Sun
OpusFlow
Yes, native included
Yes, native included
Internal Dashboarding
Optimal Sun
OpusFlow
No data available
Yes, native included
Internal Tickets & Chats
Optimal Sun
OpusFlow
Not included
Yes, native included
Internal Forms & Site Survey Forms
Optimal Sun
OpusFlow
No data available
Yes, native included
Document Management
Optimal Sun
OpusFlow
Yes, native included
Yes, native included
Custom built & DIY automations for workflow
Optimal Sun
OpusFlow
No data available
Yes, native included
Warehouse Management
Optimal Sun
OpusFlow
Not included
Yes, native included
Project Management
Optimal Sun
OpusFlow
No data available
Yes, native included
Battery Calculator
Optimal Sun
OpusFlow
Not included
Yes, native included
AI Data Assistant
Optimal Sun
OpusFlow
No data available
Yes, native included
Time Registrations
Optimal Sun
OpusFlow
Not included
Yes, native included
Open API
Optimal Sun
OpusFlow
Yes, native included
Yes, native included
Quotations
Optimal Sun
OpusFlow
Not included
Yes, native included
Contract Management
Optimal Sun
OpusFlow
Not included
Yes, native included
Not listed in public documentation as of June 4, 2026
Join over 3.000 installers using OpusFlow
"I saw the system and immediately knew OpusFlow was what I needed. I've tried competitor software at the expo as well, but none of them, even to this day, come close to what OpusFlow can do."

Reasons to choose OpusFlow

Most platforms track your projects. OpusFlow tracks your margins. Built from the ground up for solar and sustainable energy installers, it connects every job, every euro, and every team member in one system.

Below, we break down some of OpusFlow’s key capabilities that make it a powerful all-in-one alternative in the Optimal Sun vs OpusFlow comparison.

OpusFlow lets you create professional quotations in minutes

OpusFlow helps you turn leads into clear, professional quotations quickly. Customer details, system configurations, and pricing are connected, allowing your team to generate accurate offers without repetitive manual input.

By speeding up the quoting process, OpusFlow helps you respond faster and improve conversion rates. Quotes are consistent, easy to understand, and ready to send, giving customers confidence and helping your sales team close deals more efficiently.

Bring every part of your operation into a single all-in-one platform

OpusFlow combines key business functions into a single system, including purchasing, stock control, invoicing, solar design, and project management. All departments work with the same data, ensuring that information flows smoothly from sales through to installation and billing.

This unified approach reduces errors and improves visibility across the business. With fewer tools to manage and no disconnected processes, your team can work more effectively and keep projects moving without unnecessary friction.

OpusFlow supports your growth across a wide range of renewable technologies

OpusFlow is built for installation businesses that want to expand their services beyond solar. The platform supports projects involving heat pumps, battery storage, EV chargers, wind turbines, and other renewable energy technologies.

As your offering grows, OpusFlow adapts to new project types and workflows. You can manage increasing complexity within the same platform, giving you the confidence to scale your business while maintaining structure and control.

Battery calculator | OpusFlow
Automations | OpusFlow

Automate your installation workflows with OpusFlow to reduce manual effort

OpusFlow automation tools help eliminate repetitive tasks from daily operations. As projects progress, the platform automatically creates tasks, sends reminders, updates records, and triggers follow-ups without manual intervention.

These automations improve consistency and reduce the risk of missed steps. Your team can focus on delivering high-quality installations while OpusFlow ensures that routine processes run smoothly in the background.

Connects with over 6,000 tools through OpusFlow powerful API integrations

OpusFlow integrates with more than 6,000 external tools, allowing you to connect the platform with the software your business already uses. Accounting systems, marketing tools, reporting platforms, and custom applications can all be linked through integrations.

This flexibility keeps your tech stack connected and future-proof. OpusFlow acts as the central hub of your operations while giving you the freedom to adapt and evolve your systems as your business grows.

API integrations | OpusFlow
Primary benefits of ERP systems - Opusflow

OpusFlow has all the solutions for your business

Empower your business with OpusFlow: a comprehensive solution for all your needs.

Customer Testimonials

Making the switch is a big decision. These companies made it, and here’s what changed.

“With OpusFlow, we can quote as much as we need without worrying about hidden costs. That’s a big deal when you’re growing.”
Stijn de Rooij - Co-owner
Zenovo
"With OpusFlow, we can now make different automations, streamline processes, and have the flexibility to change processes within the business."
Ace Noppen - Marketing manager
e-WNDR
“OpusFlow has really helped us during a difficult time by offering an affordable solution when we needed it most.”
Verdasol
Mike Buderath - Manager
VERDASOL

FAQ

Everything you want to know before booking a demo.

What happens after the appointment — does OpusFlow handle the follow-up too?

Yes. Once the design and calculation are complete, OpusFlow’s automation engine can send a templated follow-up email the moment the quote goes out. OpusAI goes further: instruct it in plain language to draft a personalised proposal email, create the CRM contact record, and summarise the system spec from your notes — all without manual data entry. The calculation work closes the deal on-site. OpusFlow handles everything that comes after it.

What is a project management software?

Project management software helps you plan, organize and manage your projects from start to finish. OpusFlow is built specifically for sustainable installers, so every feature fits the way you actually work.

Is onboarding included?

Onboarding is not included in the subscription price. It starts from €1,500 depending on the complexity of your setup. Your sales consultant will walk you through the exact cost during contract signing.

Is it possible to add photos/files to my forms?

Yes! You can easily attach photos and files directly to your forms, straight from your phone or tablet on-site.

Which 3D scanning tools does OpusFlow work with?

OpusFlow accepts scans from iPhone Pro (via LiDAR), Matterport, Polycam, and other scanners that export in OBJ, STL, GLTF, or GLB formats. The scan is processed directly in the browser — no file upload to a server is required, which keeps the process fast and keeps your customer data on-device during the calculation.

How do customers sign contracts?

When a contract is ready to send, the customer receives a secure magic link by email. They can open it on any device, review the contract, sign digitally, and authorise their payment mandate — all without creating an account or needing a password. The whole process is designed to be as frictionless as possible so that signing does not become a reason for delay.

Does OpusFlow integrate with other tools we already use?

Yes. OpusFlow connects with Google Workspace and Microsoft 365 for calendar and email, external accounting packages via API export, wholesale product catalogues via 2BA, and payment processing via Mollie for automated SEPA billing. It also connects to Zapier for endless possibilities.

More integrations are added regularly and you can check out all possible integrations here. 

See how OpusFlow stacks up against others

Browse more side-by-side comparisons and see the difference for yourself.

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OpusFlow’s features and community driven approach make it the best PV*SOL alternative you can wish for.
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OpusFlow vs Solarstream

OpusFlow’s features and community driven approach make it the best Solarstream alternative you can wish for.

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