Wattstor Tech Stack

Onsite renewable energy systems with integrated storage and optimization

Services for Renewable Energy London 51–200 employees Founded 2013 Privately Held

Wattstor designs and operates behind-the-meter renewable energy and battery storage systems for commercial customers. The tech stack—Python, InfluxDB, Modbus, OCPP—reflects a hardware-centric business requiring embedded systems integration and real-time energy monitoring. Current hiring is engineering-focused with active recruitment for mid-level and senior roles, while projects reveal two operational priorities: system architecture and compliance (AC/DC coupling, grid-code regulation), and battery optimization (BESS tuning, energy aggregation). A Python 2→3 migration and QA architecture work suggest internal technical debt being addressed alongside product maturity.

Tech Stack 18 technologies

Core StackPython Docker JavaScript InfluxDB Cypress Playwright Selenium Postman TypeScript Ubuntu Git ZeroMQ SQLite Modbus OCPP RS485 Appium REST Assured

What Wattstor Is Building

◆Challenges

Monitoring regulatory changes
Ensuring product compliance
Managing supplier certifications
Expanding hardware development capabilities
Optimizing bess operation
Migrating codebases from python 2 to python 3
Improving product quality
Reducing defects

▲Active Projects

Designing ac and dc coupled system architectures
Ensuring compliance with safety, emc and grid-code regulations
Evaluating and selecting technology suppliers
Bess optimization
Energy aggregation and trading
Qa function architecture
Automated test suite development

Hiring Activity

Accelerating7 roles · 6 in 30d

Department

Engineering

Seniority

Mid

Intern

Manager

Senior

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About Wattstor

Wattstor designs, finances, builds, and operates onsite renewable energy systems paired with battery storage for commercial buildings and facilities. Customers purchase the electricity generated at rates below grid cost while Wattstor owns and optimizes the assets. The company handles the full stack: hardware selection and procurement, system architecture, regulatory compliance (safety, EMC, grid codes), ongoing operations, and energy trading. Founded in 2013 and based in London, Wattstor operates at a scale of 51–200 employees with an engineering-forward organization.

HeadquartersLondon

Company Size51–200 employees

Founded2013

Frequently Asked Questions

What tech stack does Wattstor use?

Python, Ubuntu, Docker, JavaScript, TypeScript, InfluxDB for time-series data, Modbus and OCPP for hardware communication, SQLite for local storage, and Cypress/Playwright/Selenium for testing.

What is Wattstor working on?

System design (AC/DC coupled architectures), regulatory compliance (safety, EMC, grid codes), battery storage optimization, energy aggregation and trading, QA architecture, and automated test suite development.