Overview
The K2 Base integration connects Eturnity Expert with K2 Base for professional mounting system dimensioning. This workflow allows you to design PV systems in Expert, perform detailed structural planning in K2 Base, and import accurate bills of materials back to Expert—all with automated data transfer.
Value: K2 Base provides structural validation (wind/snow loads) and generates precise component lists with all rails, clamps, hooks, and mounting hardware needed for installation.
Step 1: Link Your Accounts
Connect your Eturnity Expert and K2 Base accounts using an authentication token. This is a one-time setup per user.
Generate Token in Eturnity Expert
Navigate to Settings > Integrations > K2 Base
Click Generate Token
Click Copy Token to copy your unique authentication token
Save Token in K2 Base
Log in to your K2 Base account
Click your user name (top right) and select Settings
Paste your token in the Eturnity Authentication Token field
Click Save
Your accounts are now linked
Step 2: Prepare and Export Your Project
After planning your PV project in Expert, mark it for transfer to K2 Base.
Requirements for Transfer
Your project must meet these conditions:
Uses 3D layout (2D layouts cannot be transferred)
Uses K2 mounting systems exclusively
All module fields on the same roof use the same K2 mounting system type
Contains at least one roof with modules
Export Process
Open your project and click K2 Base in the left project menu
Select the project variant you want to transfer
Click Transfer Project Data to K2
Wait for the success confirmation
Click Open K2 Base to launch K2 Base
Step 3: Import and Plan in K2 Base
Import your project into K2 Base to perform detailed mounting system planning and structural validation.
In K2 Base, click Open Project from K2+ on the dashboard
Select Eturnity from the integration options
Choose your project from the list (shows all projects where you're the project manager)
Click Create Project to import
Complete the planning in K2 Base
Important: The exact module arrangement (row and column spacing) is not transferred 1:1 from Expert to K2 Base. K2 deliberately does not allow this: only this way can K2 ensure that row and column spacing, thermal gaps, and the entire mounting system design comply with applicable standards. K2 Base therefore recalculates the module layout itself based on the roof area you transferred.
Step 4: Export Bill of Materials to Expert
After completing your K2 planning, export the detailed bill of materials back to Eturnity Expert.
In K2 Base, navigate to the Summary step
Click K2+ Eturnity Export on the left sidebar
Select Eturnity
Expert opens automatically with the import modal displayed
Configure Import Settings
The bill of materials is divided into two sections:
New Components (top section): Components not yet in your library
Define Purchase Discount (percentage off K2 list price)
Define Margin (your markup percentage)
Set Exchange Rate if needed (K2 prices are in EUR)
Click Apply to All Positions
Existing Components (bottom section): Components already in your library
Prices are taken from your library settings
Quantities are updated based on K2 planning
Review all components and pricing
Click Import
Choose to import to project only or also create library components
Click Apply
Step 5: Understanding the Collective Position
The imported K2 bill of materials appears as a collective position named K2 Components in your project BOM.
This collective position contains all mounting system components from K2 Base. You can:
Choose whether to display sub-positions in detail on customer proposals
View individual components and quantities within the collective position
Manually adjust prices if needed
Layout Synchronization: Since K2 Base recalculates the module layout itself to comply with applicable standards (see above), the resulting module count may differ from your Expert layout—this is expected. After importing, verify that the module count still matches your expectations. If it differs, adjust your 3D layout as needed or use the "Custom Amount of Modules" feature.
Why Can't I Transfer My Project?
If your project variant appears greyed out on the K2 Base page, check these common causes:
"Project variants that do not exclusively use K2 mounting systems cannot be transferred"
→ Verify all module fields use K2 mounting systems only"You cannot transfer project variants without roof and panel fields created"
→ Create a 3D layout with at least one roof and module field"You cannot transfer project variants that contain roofs with different K2 mounting system types"
→ Ensure all module fields on each roof use the same K2 mounting system type"You cannot transfer project variants that do not use 3D layout"
→ Create a 3D variant instead of 2D
Understanding Project Status
The integration uses a "Ready for Export" status to manage project transfers:
Marking for Export: Clicking "Transfer Project Data to K2" in Expert marks the project as "Ready for Export" but doesn't transfer data yet
Making Changes: You can modify your layout in Expert after marking for export—changes are visible when you import to K2
Multiple Imports: You can import the same Expert project multiple times in K2, creating separate K2 projects for each import
Unmarking After Import: When you import the K2 BOM back to Expert, the project is automatically unmarked as "Ready for Export"
Re-exporting: To transfer the project again after importing the BOM, click "Transfer Project Data to K2" again
Tip: Since each import to K2 creates a new project, you can have multiple K2 planning versions from one Expert project. Make sure you're working with the latest version when exporting back to Expert.
Need Help?
If you encounter issues with the K2 Base integration:
Eturnity Support: Contact support@eturnity.com for data transfer, authentication, or Expert interface issues
K2 Support: Contact K2 directly for K2 Base functionality, structural calculations, or component selection issues