Odoo for upper mid-market companies and corporate groups: Every department. Every company. One database.
Ruetech is an Odoo Silver Partner in Freiburg. We replace Dynamics, Navision, Sage and other legacy systems with Odoo – at a fixed price, with DATEV export, GoBD configuration and e-invoicing.
Centroplan GmbHOdoo 19
1Odoo database for the whole group
- Industry
- Energy & Solar
- Companies
- in several European countries
- Reference
- in the Odoo partner directory
- Odoo Silver Partner
- Certified for Odoo 14–19
- Fixed-price migration
- Reply within one business day
1 · Handovers
The expensive part is the handover between two programs.
A grown system landscape is not expensive because of any single program. The cost sits in the seams between them: export, import, re-typing, an Excel list between departments, sites and companies.
Sales
OdooExample
Sales order
S00042
- Customer
- Your customer
- Item
- Housing, type A
- Quantity
- 12
Manufacturing
OdooExample
Manufacturing order
WH/MO/00042
- Item
- Housing, type A
- Quantity
- 12
- Order
- S00042
Warehouse
OdooExample
Delivery note
WH/OUT/00042
- Customer
- Your customer
- Item
- Housing, type A
- Quantity
- 12
Accounting
OdooExample
Invoice
INV/2026/00042
- Customer
- Your customer
- Quantity
- 12
- Amount
Tax adviser
DATEVExample
Posting batch
DATEV export
- Debtor
- Your customer
- Document
- INV/2026/00042
- Amount
Status of record S00042
- Quote
- Order
- Production
- Delivery
- Invoice
- Posting
Today: the order is entered again at every seam.
Sales sends a PDF, manufacturing plans in an Excel list, the warehouse prints the delivery note. Accounting re-types it and exports for DATEV. Four handovers within one company, and each one can change a value.
With Odoo: one record from quote to posting.
Sales, warehouse, manufacturing and accounting work on the same data. Nobody enters the order a second time. The DATEV export hands postings and documents to your tax adviser in the familiar format.
Analysis
We check each requirement against standard Odoo and identify manual data transfers.
Data is carried through from the order to the accounting entry, across companies too. When one company orders from another, Odoo creates a draft sales order in the other company. When that company issues its invoice, Odoo creates the vendor bill in the ordering company. You set the rules per company.
2 · E-invoicing 2027
A PDF is not an e-invoice.
From 1 January 2027, companies with more than €800,000 prior-year turnover must issue e-invoices. From 2028 the obligation applies to all companies.
Groups of companies. The German duty applies between businesses in Germany. Entities abroad follow the law of their country.
Deadlines in Germany, Austria, Switzerland, France and the EUUntil 31 December 2026 you may send invoices as PDF if your customer agrees.
Section 27(38) UStG<rsm:CrossIndustryInvoice> <rsm:ExchangedDocumentContext> <ram:ID>urn:cen.eu:en16931:2017 <rsm:ExchangedDocument> <ram:ID>RE-2027-0001</ram:ID> <udt:DateTimeString>20270104 <ram:SellerTradeParty> <ram:Name>Your company <ram:BuyerTradeParty> <ram:Name>Your customer <ram:GrandTotalAmount></rsm:CrossIndustryInvoice>ZUGFeRD invoice: PDF with an embedded XML file
You cannot tell an e-invoice by its picture. You tell it by its data.
The PDF carries a data set under EN 16931. That data set leads, not the picture (BMF letter of 15 October 2024, para. 31).
The first invoice run after the turn of the year.
Continued on the e-invoicing page
/en/e-invoicing/3 · Switching to Odoo
The system changes. The data moves with it.
From Dynamics, Navision, Sage, Lexware, Xentral, weclapp or Excel to Odoo: we transfer master data, open items and templates, for groups with several legal entities too.
What moves
- Master data
- Customers, suppliers and products move with their fields.
- Open items
- Your accounting team reconciles them in a test migration before cutover.
- Templates
- They come over from the legacy system by script instead of being retyped.
What is included
- DATEV export
- Your tax adviser keeps receiving postings and documents in DATEV format.
- GoBD configuration
- Postings are immutable, documents audit-proof, and every change stays in the history.
- Fixed price
- The price is fixed before the migration starts.
Tell us which system you are replacing. You get, in writing, what the switch requires and where the risk lies.
4 · References
Projects you can check for yourself.
See who we work with and what each project covers. On request, we arrange a reference call between your management and one of our clients.
References in the DACH region
Centroplan: View company profile
Odoo 19: one database for the companies in several European countries.
Case study in preparationCompany facts: Centroplan GmbH, centroplan.com, retrieved September 2026.
Raumschmiede: View project details
All online shops on one Odoo
E-Commerce · Manufacturing · Inventory · Sales · CRM · Accounting
Rauschenberger: View project details
One Odoo database for all companies
CRM · Sales · Customer Inbox · Accounting & DATEV
Prantl: View project details
Order process mostly in standard Odoo
Point of Sale · Sales · Inventory · Online shop connector
LocMaint: View project details
Central customer management
CRM · Helpdesk · Project
Projektmagazin: View project details
Portal front end integrated
Website · Events · CRM · Project
- Odoo partner status
- Silver
- References in the partner directory
- 6
- Users in the largest project
- 200+
- Customer retention
- 100 %
5 · Services & industries
Six services.
One database.
From the first consultation to ongoing support, our Freiburg team looks after your Odoo project – in energy, manufacturing, trade, logistics or catering. In one database you run several legal entities, each with its own accounting.
All servicesOdoo ERP
We compare your requirements with Odoo and identify what the standard software covers and where development is needed.Migration
We replace Dynamics, Navision, Sage or Excel. The switch happens at the end of a month, quarter or year.Implementation
Agreed project phases take you from specification to go-live. For company groups, we plan 3 to 9 months.Development
Where standard Odoo reaches its limits, we develop modules and interfaces. Every customisation is documented and stays upgrade-safe.E-invoicing
We set up XRechnung, ZUGFeRD, Peppol, incoming invoices and archiving in Odoo – ahead of the German mandate from 1 January 2027.Support
Your contact is familiar with your system. Before the annual Odoo upgrade, we check your customisations in a test environment.
Industries
Our Odoo projects come from these industries.
- Manufacturing & EngineeringConnect bills of materials and manufacturing orders with purchasing.
- Service Providers & Company GroupsTrack project time, invoice the work delivered, run several companies in one database.
- WholesaleManage multiple warehouses, customer prices and quantity discounts centrally.
- LogisticsUse the same data for warehouse operations, shipping and billing.
- Retail & E-CommerceShare one product catalogue across your online shop, warehouse and store checkout.
- RentalManage availability, rental contracts and recurring billing.
- Catering & Airline CateringFrom planning and production through to invoicing, in event catering and airline catering alike.
- All industries
6 · Process & commitments
Agreed in advance.
Signed off in writing.
Before the start we agree in writing who decides, how sign-offs work and how changes are handled.
ScheduleExample: a 16-week implementation
Before the start
Binding
Fixed-price quote
Within five business days. It states the planned go-live date.
Initial meeting
Weeks 1–2
Written sign-off
Specification
Modules, customisations, acceptance criteria. An existing requirements document is included.
Analysis and specification
Weeks 3–9
Written sign-off
Test instance
Master data, posting rules and warehouse routes, with the agreed customisations.
Configuration and development
Weeks 10–14
Written sign-off
Test migration
Balances and open items are reconciled. Your team tests its processes.
Data migration and testing
By week 16
Written release
Go-live
Training per role on your own data. With the sign-off: the customisation documentation.
Training and go-live
60 days
Then
Support
We review progress every week. Then a dedicated team looks after your system.
Post-go-live support
No commitment without proof.
Each commitment comes with a document you can check it against.
What we commit to: You receive your binding fixed-price quote within five business days.
How you can check it: Fixed-price quoteFor company groups a preliminary analysis comes first.
What we commit to: We cover additional effort within the agreed fixed-price scope.
How you can check it: SpecificationIt separates standard functions from customisations and fixes the scope the fixed price covers.
What we commit to: For company groups we set up a steering committee.
How you can check it: Project governanceYour management, our project lead and our management decide on scope, dates and budget at the milestones.
What we commit to: The project lead and deputy for your project are named.
How you can check it: Project governanceAgreed in writing before the start, with an escalation path straight to our management.
What we commit to: We reply to your enquiry within one business day.
How you can check it: ReplyBy the timestamp of our reply. Request a migration check
Process and project governance in detailOdoo implementation: packages and phases
7 · Questions
Questions before deciding on Odoo
These are the questions we regularly discuss with management, accounting and IT before an Odoo project begins.
Is Ruetech the right fit for our company?
We work for larger mid-sized companies and for groups with several legal entities, across industries: from manufacturing and trade to logistics, energy and catering. Odoo often replaces Dynamics, Navision, Sage, Lexware, Xentral, weclapp or Excel there. The Odoo partner directory lists six references and more than 200 users in the largest project (as of October 2026). We do not currently have a published SAP replacement reference. The migration check establishes whether Odoo fits your requirements.
How long does an Odoo implementation take?
A Quick Start takes 4 to 6 weeks. We plan 8 to 16 weeks for an implementation with 4 to 8 modules, and 3 to 9 months for transformation projects in company groups. Your fixed-price quote states the planned go-live date.
Can we bring our data over from the old system?
Yes. We migrate master data, open items and documents from Dynamics, Sage, Lexware, Xentral, weclapp and Excel. At Rauschenberger we replaced Dynamics CRM and moved the data by script.
Does Odoo work with DATEV?
Yes. Odoo exports postings, master data and documents in DATEV format, so your tax adviser keeps working with their usual tools. For Rauschenberger we adapted the export to the accounting of the legal entities in Germany and abroad.
Is Odoo GoBD-compliant?
On the system side, yes. Odoo Enterprise with the German localisation records postings immutably, stores documents in an audit-proof way and logs every change. This configuration is part of every Ruetech implementation in Germany. As with any system, the procedural documentation (Verfahrensdokumentation) remains your company's responsibility.
Is Odoo GDPR-compliant and where is the data hosted?
Yes, Odoo can be operated in compliance with the GDPR. You choose between three options: cloud hosting by Odoo SA in EU data centres, a German hosting partner of your choice, or your own servers.
What is the difference between Odoo Community and Enterprise?
Odoo Community is free and open source. It covers CRM, sales, purchasing, inventory and invoicing, among others. Odoo Enterprise requires a licence and adds all other modules, full accounting, DATEV export, the mobile apps and vendor support. For companies in Germany we usually recommend Enterprise.
Do you offer training?
Yes. We train users and administrators in Freiburg, at your premises or by video call. For Prantl we also produced video lessons and placed instructions directly in the system.
What is Odoo ERP?
Odoo is ERP software made by Odoo SA. It connects more than 80 modules in one database, including CRM, sales, purchasing, inventory, manufacturing, accounting and e-commerce. The software core is open source. For projects in Germany we mostly use Odoo Enterprise, with German localisation and vendor support.
How much does an Odoo implementation cost?
We deliver Quick Start and Implementation at a fixed price. The price depends on modules, data migration, interfaces, customisation and the scope of training. Odoo Enterprise licences per user come on top; Odoo publishes them at odoo.com/pricing, and our quote lists them separately over five years. You receive the binding quote within five business days of the first call. For transformation projects we prepare it after the preliminary assessment.
How does support work after go-live?
After go-live you choose one of four support plans: Basic, Standard, Premium or Managed. Depending on the plan, the response time ranges from the next business day to two hours. Your contact and their deputy are named. Escalations go directly to management.
Your question is not here? Ask it in the migration check.
8 · Enquiry
Replacing an existing system?
Describe your plans in one or two sentences. Within one business day you receive a one-page written assessment of the requirements and risks of the migration.
Migration check
Odoo Silver Partner
Written assessment within one business day
- You can pass the written assessment on to management, finance and IT.
- With several companies and sites, tell us how many and which systems you use today.