VoltWise — Because charging an EV shouldn’t feel like installing 15 different apps

If you own (or have tried to use) an electric vehicle, you’ve probably been through this:

👉 arrive at the charger
👉 open the wrong app
👉 download another app
👉 create an account
👉 verify email
👉 try again
👉 still doesn’t work

Congrats, you just used more phone battery than your car.

That’s basically what made me start VoltWise.

💡 The idea

VoltWise starts with a simple (and slightly ambitious) goal:

Unify the EV charging ecosystem.

Today, every charging station has:

• its own app
• its own backend
• its own API
• its own problems

The idea is to build an open-source platform that:

• helps small hotels and businesses offer charging
• provides a standardized backend
• offers a unified mobile app
• integrates with other systems in the future

Yes, it’s ambitious. But someone has to start.

🏗️ Architecture (aka: how I made things more complex on purpose)

Overview of VoltWise architecture, including OCPP communication, local agent, and cloud.

The project is split into multiple modules:

• voltwise-core → shared business logic
• voltwise-ocpp → charger communication
• voltwise-cloud → central backend and API
• voltwise-agent → local software (hotel / site)
• voltwise-portal → web dashboard
• voltwise-mobile → user app
• voltwise-docs → documentation (because I try to be organized)

⚙️ Tech stack

A mix of experience, curiosity, and “I want to try this”.

Backend / Core

• Go (Golang)
  • voltwise-core
  • voltwise-ocpp

Why: performance and great concurrency for device communication.

Cloud / API

• Django + Django REST Framework

Why: fast development and a very mature ecosystem.

Mobile

• Flutter

Why: single codebase for Android and iOS.

Web Portal

• Vue.js

Why: clean, simple, and efficient.

Local Agent

Still undecided 🤔

Options:

• Go (very likely)
• Python
• maybe Flutter Desktop

🔌 OCPP (the important part)

The project will use:

• OCPP 1.6

This is basically the language chargers speak.

Without it → nothing works
With it → things should work 😅

🌍 Future vision

This is not just another project.

It’s an attempt to solve a real problem:

today you need a different app for every charging network.

In the future, VoltWise could:

• integrate with other platforms
• enable roaming between networks
• unify payments
• become an open charging hub

And of course…

👉 maybe turn into a SaaS (because open source doesn’t pay for coffee).

🚀 Why I’m building this

• technical challenge
• learning IoT and OCPP
• building something actually useful
• improving my portfolio
• and because it sounded like a great idea at 2AM

📌 Next steps

• structure repositories
• start core in Go
• implement basic OCPP (with WebSocket and basic auth)
• build Django backend (and connect to Vue.js Portal)
• document everything
• integrate local Agent with the Cloud
• finish and launch the Mobile App

If you made it this far, you’re already more involved than most people 😄

I’ll keep documenting everything here.