Every order your team re-keys manually into the ERP is a mistake waiting to happen. We connect your online store and your ERP so that stock, orders and invoicing flow automatically — no delays, no duplicates.
An online store that grows without ERP integration creates a predictable operational problem: the team re-enters orders by hand, online stock does not reflect what is in the warehouse, and invoicing falls behind because nobody knows what has been charged and what has not. That is the invisible cost of a digital channel running in isolation. At Summum Sistemas we have been solving exactly this situation for SMEs and mid-market companies since 2007.
eCommerce-ERP integration is not an open-ended custom development; it is a well-defined set of data flows: catalogue and prices from the ERP to the store, orders and customer data from the store to the ERP, and shipping statuses and stock levels back to the store. When those four flows work in real time — or with latency under five minutes — the operations team stops acting as a manual intermediary and the business scales without adding headcount.
We use the native connectors of each platform where they exist (Odoo's eCommerce module, Sage's WooCommerce REST API integration) and our own middleware layer when the ERP-platform combination requires it. We do not offer a one-size-fits-all solution: the first step is to map your actual data flows, identify the current breaking points and size the integration precisely to your order volume — neither over-engineered nor under-built.
We map the data currently moving between your store and your ERP: orders, stock, customers, prices, shipping statuses. We identify where the chain breaks, how much manual time it consumes and what errors it generates. The output is a flow document with the minimum viable integration for your current order volume.
We define the architecture: native connector, lightweight middleware or custom API development depending on the ERP-platform combination. We establish the synchronisation frequency by data type (stock in real time, orders every minute, catalogue in a nightly batch), data transformation rules, and error handling and retry logic.
We deploy the integration in a test environment using anonymised real data. We run critical scenarios: order with variants, simultaneous stock-out across multiple channels, return that adjusts inventory, electronic invoice generated in the ERP. We validate every flow before touching production.
We carry out the cut-over with a contingency plan: if something goes wrong, the team knows exactly what to do and how long a rollback takes. After go-live, we monitor the flows during the first weeks and deliver an alert dashboard so your team knows immediately if a synchronisation fails.
The operational detail: what we deliver as part of the work and what we keep alive afterwards.
Real-time stock synchronisation
Inventory levels in the store always reflect the real ERP stock, by warehouse or location. Overselling non-existent products and erroneous blocks caused by stale stock are eliminated.
Automatic order push to the ERP
Every confirmed order in the store enters the ERP directly as a delivery note or sales order, with the customer's data, product lines and payment method. No manual entry, no transcription errors.
Catalogue and prices from the ERP
Products, descriptions, images, price lists and categories are published and updated from the ERP as the single source of truth. A price change in the ERP is reflected in the store without any intervention from the web team.
Invoicing and Verifactu integrated
Online orders generate the invoice or receipt in the ERP with the correct tax data, complying with the Verifactu format where applicable to your company. To go deeper on mandatory electronic invoicing compliance, see our dedicated Verifactu and factura-e service.
Returns and credit note management
A return initiated in the store automatically triggers the stock movement and the credit note in the ERP, without the team having to touch two systems separately.
Monitoring dashboard and alerts
We deliver a basic control panel showing synchronisation status, logged errors and processed order volume. If a synchronisation fails, the system sends an email alert before the issue becomes visible to the customer.
Connecting the digital channel to the ERP is the first link in the chain; Summum IA adds intelligent process automation, and Summum Consultoría covers legal compliance for the online channel.
Once the ERP-eCommerce integration is running, n8n can orchestrate more complex flows: notifications, order routing by business rule, or connections to additional marketplaces.
View service → sistemasPower Automate and Power Platform extend automation beyond the online channel: approvals, replenishment alerts, automatic sales reports integrated with the ERP.
View service → consultoríaThe technical side of the store must be paired with legal compliance: legal notice, privacy policy, terms of sale and LSSI obligations for the online channel.
View service →It depends on the platform combination and the number of flows involved. A standard integration between WooCommerce and Odoo or Sage 200, covering the four basic flows (stock, orders, catalogue, statuses), typically takes four to eight weeks. Integrations with more complex business logic — multiple warehouses, customer-specific pricing, additional marketplaces — require more analysis and testing time.
The most common combinations we handle for SMEs are WooCommerce with Odoo or Sage 200, PrestaShop with Sage or Dynamics 365, and Shopify with Holded or Odoo. We also tackle integrations with Magento and more specific ERPs such as a3ERP when the client already has them in place. If your combination is not on this list, get in touch: the first thing we do is assess technical feasibility at no commitment.
Yes. The integration architecture we design can be extended to marketplace connectors, so that orders from Amazon, Miravia or any other channel also flow into the ERP and draw from the same stock pool. This requires additional analysis because each marketplace has its own API restrictions and synchronisation rules.
It is a real risk we address from the design stage: we document the API versions in use, configure error alerts on the flows and offer a maintenance service to adapt the integration when either system updates its interface. We alert you before the problem reaches the end customer.
In most cases, yes. We work on the systems you already have in place, whether proprietary ERPs with a REST API or third-party connectors. You do not need to migrate to a new ERP to have a functional integration, although if the current ERP has serious technical limitations we flag this in the initial diagnostic so you can make an informed decision.