How Odoo ERP Optimized Engineering Operations for a Solar EPC Company

Client Overview

The client is a mid-sized Solar EPC company specializing in utility-scale solar farms, rooftop solar installations, and hybrid renewable projects.

They execute projects across multiple geographies, handling end-to-end EPC contracts from engineering design and procurement to construction, commissioning, and maintenance.

Their engineering division manages PV system design, structural load calculations, cable sizing, inverter configurations, and energy yield assessments.

With increasing project complexity and rapid growth in demand, the client sought a solution to digitally transform engineering operations and establish seamless collaboration between engineering, procurement, and site execution teams.

Project Overview

The project’s objective was to implement Odoo ERP as a centralized digital backbone for the client’s engineering workflows.

The solution focused on:

• Engineering Document Management (EDM) for CAD drawings, PV system layouts, and structural designs.
• Engineering Change Order (ECO) automation to track revisions.
• BOM (Bill of Materials) versioning for PV modules, inverters, mounting structures, and balance-of-system (BOS) components.
• Integration with procurement and inventory to ensure materials availability matched engineering designs.
• Project monitoring dashboards with KPIs on timelines, resource utilization, and CAPEX/OPEX forecasts.

Our team was selected because we offered a custom-engineered Odoo ERP solution, specifically designed for Solar EPC engineering needs not an off-the-shelf package.

Challenges & Objectives

Challenges

1. Engineering Design Bottlenecks

• Delays in PV layout approvals due to manual workflows.
• Frequent structural and electrical design revisions caused rework downstream.

2. Poor ECO & BOM Control

• No centralized system for managing Engineering Change Orders (ECOs).
• BOM revisions not synchronized with procurement, leading to material mismatches.

3. Data Silos

• Engineering drawings, inverter load lists, and SCADA requirements scattered across spreadsheets and shared drives.

4. Lack of Real-Time Visibility

• Project managers lacked dashboards for tracking engineering progress, cost impact of revisions, and procurement status.

5. Compliance Risks

• Difficulty maintaining documentation for IEC standards, grid compliance, and quality audits.

Objectives

• Digitize and standardize engineering approval workflows.
• Implement ECO tracking with version control.
• Sync engineering outputs with procurement, warehouse, and project execution.
• Enable real-time project monitoring and cost control.
• Improve traceability and compliance through centralized EDM.

Scope of Work

• Custom Engineering Workflow Automation within Odoo.
• Development of ECO & BOM Revision Control modules.
• Integration of engineering BOMs with procurement & MRP (Material Requirements Planning).
• Project planning and resource allocation using Gantt-based scheduling.
• Custom dashboards for engineering managers and project directors.
• Migration of legacy CAD drawings and Excel-based BOMs into ERP.

Solution Design

ERP Architecture

We designed a bespoke Odoo ERP architecture tailored for Solar EPC workflows. Key highlights:

• Engineering Document Management (EDM): Centralized repository for PV system layouts, cable sizing diagrams, and structural drawings. Controlled access with versioning and audit trails.
• Engineering Change Orders (ECO): Configured ECO workflows with approval hierarchies, revision tracking, and cost impact assessment.
• BOM Synchronization: Multi-level BOM management for PV modules, inverters, transformers, switchgear, mounting structures, and cabling.
• Procurement Integration: Automated PR (Purchase Requisition) generation from BOMs, ensuring timely vendor engagement.
• Project Tracking Dashboards: Role-based dashboards displaying ECO status, BOM revisions, procurement delays, and CAPEX vs. budget.
• Compliance Module: Custom workflows to ensure adherence to IEC/ISO standards, DISCOM approvals, and regulatory reporting.

Implementation Steps

1. Requirement Gathering — Conducted workshops with engineering heads, project managers, and procurement teams to identify gaps in existing workflows.
2. Custom Module Development — Built bespoke ECO and BOM version control modules with automated notifications.
3. System Integration — Linked engineering, procurement, inventory, and project execution into one workflow.
4. Data Migration — Imported historical BOMs, ECO logs, and CAD references into Odoo ERP.
5. Validation & Testing — Stress-tested ERP modules with active projects (rooftop and utility-scale).
6. User Training — Delivered role-specific training for engineers, project managers, and procurement officers.
7. Go-Live & Support — Phased rollout with post-go-live monitoring and continuous improvement cycles.

Execution Challenges

• User Adoption: Engineers accustomed to AutoCAD + Excel were hesitant to shift. Addressed via training and change management workshops.
• Concurrent ECOs: Multiple design changes occurring across projects caused conflicts. Resolved by implementing parallel ECO workflows with impact analysis.
• Integration Complexity: Aligning procurement timelines with engineering BOM revisions required real-time synchronization.
• Customization Depth: Off-the-shelf Odoo modules lacked EPC-specific features, so we built custom add-ons for Solar EPC.

Results & Impact

Within six months of implementation, the client reported:

• 40% faster design approval cycles due to automated workflows.
• 30% reduction in material shortages by aligning procurement with BOM updates.
• Improved traceability of solar modules and BOS components across sites.
• Real-time monitoring of ECOs and cost impacts via dashboards.
• Seamless collaboration between engineering, procurement, and construction teams.
• Enhanced compliance readiness for grid audits and regulatory inspections.

Press enter or click to view image in full size

Client Feedback & Innovations

The client emphasized that the solution was a true enabler of EPC efficiency.

• They highlighted how custom ECO workflows reduced rework and engineering conflicts.
• The ability to link PV layout revisions directly with procurement saved weeks of delays.
• They appreciated that this was not a standard ERP, but a custom-built Solar EPC solution reflecting their exact workflows.

Key Learnings & Project Team

Key Learnings

• Generic ERP solutions cannot address the complexities of EPC engineering.
• BOM versioning and ECO workflows are critical to reducing delays.
• Change management and training drive adoption more than features.
• Real-time dashboards empower project directors to make faster decisions.

Project Team

• ERP Solution Architects(2) — Designed the Odoo customization framework.
• Functional Consultants (1) — Configured workflows, BOM, ECO, and procurement modules.
• Solar EPC Workflow Specialists(1) — Mapped PV system and BOS-specific processes.
• Engineering & Project Managers (Client-side) — Provided domain insights and validation.

This case study demonstrates how Odoo ERP, when custom-engineered for Solar EPC, can transform engineering operations.

It proves that off-the-shelf solutions fall short in addressing EPC-specific workflows, while custom ERP implementations built by domain experts deliver measurable ROI and operational resilience.

To know more drop us a line at sales@apagen.com or call us on +91 9971800665.