EV Charging Software Development (OCPP CSMS)
We build and operate EV charging software, not just write it. buildbyRaviRai runs PlugEV, a production OCPP 1.6-J charge point management system (CSMS) live on 40+ chargers across two Indian cities since early 2025. We build the full stack an EV charging operator needs: the OCPP gateway that talks to the hardware, RFID and UPI billing with automatic GST invoices, the operator dashboard, and the driver-facing app.
Why teams choose us for EV Charging Software
Most teams pitching an EV charging platform have never had a charger disconnect at 2am or reconciled an offline session into a payment gateway without double-charging. We have. Running PlugEV taught us the parts of OCPP the spec glosses over: vendor quirks between charger brands, offline authorization, idempotent billing, and keeping a WebSocket fleet healthy at 99.7% uptime. You get software built by people who operate it, not a demo.
When EV Charging Software is the right choice
This is for you if you are a charge point operator (CPO) launching or scaling a network, an OEM shipping chargers that need a backend, or a business adding EV charging to a site such as a mall, hotel, or fleet depot. If you just need one charger wired to an existing platform, we will tell you honestly that a custom CSMS is overkill.
Our EV Charging Software Process
We map your chargers, connectors (CCS2, Type 2, GB/T), OCPP versions, and payment plus tariff needs. Output: a written scope, a data model, and a flat INR quote.
We build the WebSocket gateway in Go that speaks OCPP 1.6-J today with a 2.0.1 path, handles per-vendor quirks, and keeps sessions alive through flaky networks.
RFID authorization with offline fallback, UPI and card billing via Razorpay, per-session, time, or kWh rating into paise, and automatic GST invoices. Idempotency keys so a retry never double-charges.
An operator dashboard for live status, sessions, and revenue, plus a driver app or web flow to find a charger, start a session, and pay.
We go live on a small pilot, watch it under real load, then roll out. Ongoing monitoring and a maintenance retainer keep the fleet healthy.
What we deliver
- OCPP 1.6-J and 2.0.1 CSMS development
- Charge point management dashboard
- RFID authentication with offline fallback
- UPI and card billing (Razorpay) with automatic GST invoices
- Per-session, time-based, and per-kWh tariff engines
- Driver mobile app and web charging flow
- Load management and smart charging
- OCPI roaming integration
- OEM charger backend and white-label CSMS
- Migration from an existing platform to a custom CSMS
Transparent pricing
OCPP 1.6-J gateway, basic dashboard, RFID or UPI start and stop, and billing for a small pilot fleet. Live in weeks, not months.
Full operator dashboard, driver app, tariff engine, GST invoicing, and the reliability layer of idempotency and offline auth. This is the PlugEV shape.
White-label CSMS, OCPI roaming, OCPP 2.0.1 with certificate security, and multi-operator or multi-region setups.
Tech stack we use
PlugEV, in production
Our own EV charging platform, live since January 2025
Frequently asked questions
Which OCPP versions do you support?
We build on OCPP 1.6-J today, which around 95% of chargers shipping in India speak, with a mapped upgrade path to 2.0.1 for certificate security, smart charging, and native payment messages. PlugEV runs 1.6-J in production; we scope 2.0.1 as a defined piece of work rather than assuming it out of the box.
Can drivers pay with UPI at the charger?
Yes. We build UPI and card payment into the charging flow via Razorpay, with per-session, time-based, or per-kWh rating and automatic GST invoices. On OCPP 1.6-J we bridge the payment-to-session link in the backend; we have written a full guide on OCPP and UPI payments.
How much does an EV charging platform cost to build?
A small pilot CSMS starts around ₹3.5L. A full production platform like PlugEV, with an operator dashboard, driver app, tariff engine, GST invoicing, and the reliability layer, typically runs ₹8L to ₹15L depending on scope. Hosting and maintenance are separate. We give a flat INR quote after a scope call.
Do you support RFID cards as well as app payments?
Yes, and both can run on the same network at once. RFID with an offline fallback is how most real-world sessions start; UPI or card covers walk-up drivers. Roughly 70 to 80% of real sessions authenticate by RFID in the networks we have seen.
Can you work with our existing chargers?
If your chargers speak OCPP, and most do, yes. We handle the per-vendor quirks between brands, which is one of the messier parts of running a real fleet. Tell us the charger models and we will confirm fit on the first call.
Do you offer roaming (OCPI)?
Yes, we build OCPI integration so your network can interoperate with other operators and roaming hubs. It is usually a phase-two item once the core CSMS is live and stable.
Building or scaling an EV charging network?
Free 30-min consultation. No pitch deck, no hard sell, just an honest scoping call.
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