IoT SIM for EV charging points
Short answer
An IoT SIM for EV chargers keeps the OCPP channel always up to the CPO backend, supports deployments in underground parkings without corporate WiFi, supports eMSP roaming across networks, and allows static IP or private APN so the backend integrates the charger as just another network device. Built for charger manufacturers (OEMs) and charge point operators (CPOs) scaling deployments without breaking connectivity.
Why the SIM matters in an EV charger
The charger is an edge device: if it loses the OCPP channel to the CPO, it stops authorizing sessions, stops streaming power telemetry, and degrades. The SIM has to handle harsh environments (underground parking, outdoors with interference, remote sites without fixed lines) and keep the tunnel up.
- OCPP 1.6 and 2.0.1 over any network
- Multi-carrier for underground parking
- Optional static IP for VPN to the CPO
- eMSP roaming across charging networks
Typical deployment
AC or DC charger + 4G/5G module + iot.cards SIM. Optional private APN with site-to-site VPN to the CPO backend. The SIM keeps the channel to the CSMS (charging station management system) regardless of how the end customer authenticates: CPO app, eMSP app, RFID, or direct charger payment. Payment, session, and firmware-OTA management all flow through the same channel.
Differences by installation type
Residential charger: low traffic, price-sensitive per SIM. Standard 4G LTE IoT SIM with a basic plan. Semi-public charger (offices, hotels, communities): multi-carrier matters more so a single failure doesn't disable the charger. Fast-charging hub: static IP + private APN, mandatory high availability, SLA plan. Charger in underground parking: multi-carrier is almost mandatory to guarantee coverage.
Trial SIMs to validate your EV charger
Tell us which charger manufacturer you use (or are integrating), your CPO/CSMS, and deployment type (residential / semi-public / fast-charging hub). We send pre-configured trial SIMs so you validate the end-to-end OCPP connection before placing a batch order.
Frequently asked questions
Does it support OCPP 1.6 and 2.0.1?+
Yes. The protocol runs over TCP/TLS or WebSocket on top of the SIM transport. The SIM just keeps the tunnel up; OCPP is transparent.
Static IP for VPN to the CPO?+
Yes, recommended for medium and large CPOs. Each charger is a stable IP inside the CPO's private network, no DDNS, no intermediate services. For small CPOs it can be overkill — dynamic IP plus an event server also works.
Does it work in underground parkings?+
Multi-carrier maximizes the odds. In extreme zones an external antenna on the charger is sometimes needed to amplify signal. We validate in the field with trial SIMs before batch orders.
How much does an EV charger consume?+
5-50 MB/SIM/month in normal use (OCPP heartbeat + session telemetry). Fast charging with heavier telemetry can hit 100 MB/SIM/month. Plan sizing for a charger fleet happens in the validation session.
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