Dgreen connects energy, transport, payment and data for green mobility in Vietnam: platforms for charging, parking and fleets, bank-card acceptance at chargers, and AI assistants for businesses and public agencies. We start with EV charging; bus and metro fares come next.
Vietnam is driving digital and green transformation in transport: electric vehicles, public transport and shared charging infrastructure.
Charging, parking, fleets and fares often run on separate systems, and dispatch, reconciliation and reporting are often still manual.
People juggle separate accounts, top-ups, cash and paper tickets for each network, and each extra step turns some customers away.
Open standards connect OCPP-compliant equipment from different brands, open-loop payment accepts the bank card people already carry, and AI takes on routine work.
Each solution works on its own and connects with the others through open interfaces. We deliver them with our technology partners under one contract for software, devices and field work, and prove each one in a pilot before rollout.
Where we start
Run every site, charger and session from one platform. Chargers from different manufacturers connect over OCPP.
Forcharging and battery-swap networks, fuel retailers and site owners
Drivers tap the bank card they already carry at the charger. The same readers and bank connections extend to bus and metro fares in the next phase.
Forcharging operators and their acquiring banks
One team from site survey to live operation, and after go-live.
Forevery Dgreen project, from the first pilot to daily operation
On the same platform
Automated entry, exit and fees for cars and motorbikes, with fast cashless payment at the barrier.
Forparking operators, hospitals, campuses, industrial parks and building owners
One platform to plan, dispatch and monitor freight fleets, including fuel tankers and electric vehicles.
Forfreight, logistics and fuel distribution companies
Assistants that read files, check them and draft documents and reports. Staff review and approve.
Forpublic agencies and businesses
The plan: riders tap the bank card they already carry at the bus door or the metro gate, on the same Dgreen devices, platform and acquiring-bank connections. We will define the scope with transport operators, cities and acquiring banks.
Forbus and metro operators, and cities
Available methods depend on the service, the acquiring bank and licensed payment providers. In-app payments are also processed by the operator's acquiring bank or a licensed provider. In every case the bank or licensed provider pays the operator directly.
Two Dgreen-branded terminals: a reader for each charger and a larger terminal for charging sites. The hardware is also built for bus doors and metro gates, for our next phase. A payment-terminal manufacturer builds them and holds their EMVCo and card-scheme approvals; Dgreen specifies, configures, installs and supports them. Both accept contactless bank cards, read QR codes, connect over 4G or Wi-Fi and are managed remotely. Certificates and test reports are available on request.
A compact reader for each charger. The driver sees the hold amount and the price before charging and follows the session on screen. It is also designed for bus doors.
A larger, weather-sealed terminal for open-air charging sites. The 7-inch screen shows tariffs, progress and a QR code for the receipt, and the scanner reads QR codes on paper or a phone. It is also designed for metro gates.
Product images of Dgreen-branded devices; screen content is illustrative. Final finish may differ.
In the solution design for EV charging, the platform runs each session from tap to receipt. It requests a pre-authorization, caps the session at the approved amount and captures only what the session costs under the posted tariff.
The card is tapped and its data is encrypted in the reader.
Encrypted card dataRuns the session and the tariff. It never sees the full card number.
Authorization and capture requestsDecrypts the card data and requests authorization from the issuing bank over the card scheme's network.
Settlement, paid by the acquiring bankReceives the money directly from the acquiring bank after capture and settlement, under its merchant agreement.
Dgreen never receives, holds or transfers payment funds.
The charger reports ready. The reader shows the hold amount and the price per kWh.
Charger → platform, over OCPPThe driver taps a contactless card. The platform requests a pre-authorization for the displayed hold amount, and the approved amount becomes the session cap.
Reader → platform → acquiring bank's payment gatewayEnergy and the running total update during the session. Charging ends when the driver stops it, the battery is full or the cap is reached.
Charger ↔ platform, meter valuesThe platform prices the session from the tariff and captures that amount, within 24 hours by design. A reversal is sent for the unused part of the hold, and the issuing bank decides when it is released. The driver gets a receipt and the operator's e-invoice.
Platform → acquiring bank's payment gatewayThis is the solution design. It will be validated through testing and a pilot at each operator's own sites before rollout.
| When | What happens |
|---|---|
| The card is declined | Charging does not start and the session closes. |
| The issuer approves a lower amount | The approved amount becomes the cap. The driver can accept it or cancel, which reverses the pre-authorization in full. |
| Charging does not start, or no energy is delivered | The pre-authorization is reversed in full at once. The issuing bank releases the hold on its own timeline. |
| The capture fails | The platform retries automatically. If it still fails after 24 hours, the session goes to manual handling. |
Dgreen brings card acceptance to places that still run on cash, top-ups and closed-loop cards, starting with EV chargers and, in the next phase, buses and metro gates. We supply the terminals, the platform and the field work. The bank signs the operator as its merchant, assigns the MCC, certifies the terminal and settles directly to the operator. We work with your certification, risk and security teams from the first test.
Chargers that support OCPP connect over an open protocol, whatever the hardware brand.
Designed to support roaming between charging networks through the Open Charge Point Interface.
Dgreen readers are built on hardware whose manufacturer holds EMVCo Level 1 and card-scheme contactless approvals. Terminal certification with the acquiring bank, under card-scheme rules, will be completed before go-live.
Card data is encrypted in the reader and decrypted only at the acquiring bank's payment gateway. The platform relays it without access to the full card number and stores only a truncated number and the transaction reference. Dgreen will complete the PCI DSS assessment and registration the acquiring bank requires.
The acquiring bank, licensed by the State Bank of Vietnam, pays the operator directly. Dgreen is not a payment intermediary: it supplies devices, software and integration, and never receives, holds or transfers payment funds.
Role-based access, an audit log of every action, and data kept in Vietnam where required.
| Item | Status |
|---|---|
| Code of Conduct and Compliance, and Privacy Policy | Published |
| EMVCo Level 1 and card-scheme contactless approvals of the terminal hardware | Held by the manufacturer; available on request |
| Terminal certification with the acquiring bank | Before each go-live |
| PCI DSS assessment | Planned; scope agreed with the acquiring bank |
The charging platform gives operators one console for operations, finance and partners, and gives drivers the Dgreen app.
Illustration only. Not a live system or real data.
Find a charger, follow battery level and cost live, pay through the operator's acquiring bank or a licensed provider, and get the operator's e-invoice. For cars and e-motorbikes. Dgreen manages app accounts under its Privacy Policy.
Separate views for investors, site owners, operators and maintenance teams.
Role-based access and a record of every action taken in the system.
Agree sites, charger models, payment flows and acceptance criteria with the operator and its acquiring bank.
Connect sample chargers, readers and the platform. Test every session type and failure case, and complete terminal certification with the acquiring bank.
Go live at selected sites with real card transactions, measured against agreed criteria.
Roll out across the network, with monitoring, maintenance and upgrades.
Agreed with the operator and the acquiring bank before the first live transaction:
Plan a pilot with usVision
Purpose
We connect energy, transport and payment so that the green choice is also the easy one.
Mission
We deliver and run the digital layer of green mobility: platforms for charging, parking and fleets, open payment for every journey, and AI that takes on routine work. One team, built on open standards, from the first pilot to daily operation.
Open standards and open interfaces. No customer is locked in, not even to Dgreen.
We pilot, measure and then scale, and we only claim what we can show.
One point of accountability for the solution we deliver, coordinating our technology partners.
Customer data stays the customer's: encrypted, permissioned, kept in Vietnam where required and never reused.
We do what we committed to. We never receive, hold or transfer payment funds. Our policies are public.
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No. The acquiring bank, licensed by the State Bank of Vietnam, pays the operator directly. Dgreen supplies devices, software and integration, does not provide payment intermediary services, and never receives, holds or transfers payment funds.
Contactless bank cards, and cards stored in phones and watches, as accepted by the operator's acquiring bank. QR and e-wallet payments are available where the service supports them.
It is encrypted in the reader and decrypted only at the acquiring bank's payment gateway. The platform keeps a truncated card number and the transaction reference, never the full number.
The hardware manufacturer holds EMVCo Level 1 and card-scheme contactless approvals. Terminal certification with the acquiring bank, under card-scheme rules, will be completed before go-live.
Usually, if they support OCPP. We confirm each charger model in integration testing before rollout.
With a site survey, then integration testing and terminal certification with the acquiring bank, then a pilot at a few sites measured against criteria agreed in advance, before rollout across the network.
The charging operator named on your receipt is the merchant and handles refunds. The unused part of a hold is released by your card's issuing bank on its own timeline. If you cannot reach the operator, contact Dgreen and we will help the operator check the session.
The operator, under its card acceptance agreement with the acquiring bank. For each refund or chargeback, the platform gives the operator and the bank the session record: meter readings, tariff, timestamps, truncated card number and transaction reference.
Not yet assessed. The design keeps full card numbers out of the platform's reach, and Dgreen will complete the assessment the acquiring bank requires before go-live.
Not yet. We start with EV charging. Bank-card fares for buses and metro are our next phase, on the same devices, platform and acquiring-bank connections. We will define the scope with transport operators, cities and acquiring banks.
Banks and card schemes, operators and public agencies: tell us what you want to run, where and when.