Saadhan Charge: EV charging, end to end
An OCPP 1.6J charging management system for stations in Nepal. We built the central system that talks to the chargers, the web dashboard operators run their stations from, and the Saadhan Charge app drivers use to find, start and pay for a charge.
Chargers, operators and drivers, in real time
Every charger speaks OCPP over a WebSocket and reports its connectors, sessions and meter values. Operators need to see and control their chargers remotely and bill each session.
Drivers need to know which connector is free before they drive there, start without queueing at a counter, and see what a charge costs while it runs, in English or Nepali.
- Live connector status for every station
- Remote start, stop, restart and cable unlock
- Sessions billed from RFID card balances
- A driver app in English and Nepali
One system, three front doors
The chargers, the operators and the drivers each get the interface they need, on one central system.
- Central system
FastAPI + OCPP 1.6J
The CSMS the chargers connect to, with a REST API of 86 endpoints for users, operators, stations, chargers, connectors and billing.
- Operator dashboard
Next.js
For super-admins and charge point operators: stations, chargers, pricing, customers, transactions and settlements.
- Driver app
Flutter
iPhone and Android, English and Nepali: an OpenStreetMap station map, QR start, live charging, card wallets and a home-screen widget.
- Safety
HTTPS · secure storage
Login tokens kept in the phone’s Keychain or Keystore, and a demo mode that never touches live chargers, where charging costs real money.
What it does
Find a charger
- Every station on a list or a map, with free connectors right now
- Filter by connector (CCS2, GB/T) and power, or sort by distance
- Opening hours, photos, prices and directions
Charge
- Start with a QR scan or a free connector
- Battery level, energy, power and cost, live
- History with the transaction number of every session
Operate
- Watch chargers live, start and stop sessions
- Restart chargers and unlock cables remotely
- Manage pricing and customers, and see revenue
Have a project like this?
Our team in Pokhara designs and builds mobile apps, backends and the systems that connect them.
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