ERP System for a Solar Company β From Idea to Implementation
How we developed a custom ERP system that helped a leading solar company double its installation capacity and reduce administrative costs by 40%.
The Challenge
SolarTech Bulgaria is one of the fastest-growing companies in the photovoltaic sector. With the solar energy boom in Bulgaria during 2024-2025, the company faced a serious problem β growth was outpacing their operational capabilities.
- Project management was done in Excel β from initial quote to installation. With 30+ simultaneous projects, chaos was inevitable
- Inventory of solar panels, inverters, mounting structures was tracked manually
- Installation teams had no mobile access to project documentation
- Generating quotes took 2-3 hours due to manual calculations
- Invoicing and payment tracking was manual with frequent errors
They tried using an off-the-shelf ERP (Odoo), but configuring it for their specific business took months and the result was clunky. The team refused to use it.
Our Solution
We built a custom ERP system designed specifically for the solar industry, covering the entire project lifecycle.
Automatic Quote Generator
The manager enters site parameters and the system automatically calculates the optimal configuration β number of panels, inverter type, mounting structure. A professional PDF quote with 3D roof visualization, ROI calculation, and payment schedule is generated. Quote time dropped from 2-3 hours to 15 minutes.
Project Pipeline with Kanban
Every project goes through defined stages with automatic notifications for delays. The Kanban board provides visual overview of all projects and their stages.
Mobile App for Installation Teams
We developed a mobile app for field teams with daily tasks, technical documentation, site navigation, and installation checklists. Photo progress is automatically uploaded to the project.
Technology Stack
Backend: C# .NET 8, Entity Framework, PostgreSQL
Frontend: Next.js 14, React, Tailwind CSS
Mobile: React Native, Expo
PDF: Custom generation engine
Results
SolarTech doubled simultaneous projects from 30 to 60+ without additional admin staff. Professional PDF quotes with 3D visualization increased conversion from 22% to 35%. The investment paid for itself in 4 months.
"The ERP system from Saitami changed how we work. The quote generator is magic β clients are impressed by the professional PDFs with 3D visualization. The mobile app for teams eliminated the chaos of paper drawings and lost documents. The investment paid for itself in 4 months."
Georgi Ivanov, CEO of SolarTech Bulgaria
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