SIM Cards and Connectivity for EV Charge Points
Multi-network SIM cards and managed cellular for EV chargers and charge point operators.
Regulatory context: EU CRA, UK Smart Charge Points Regulations, ISO 15118-2 (mandatory Jan 2026), ISO 15118-20 (Jan 2027), OCPP 2.0.1, NIS2 for energy operators, UK CSR Bill for 300MW+ load controllers.
SIMSY provides multi-network SIM cards and managed connectivity purpose-built for EV chargers. Charge point operators use SIMSY for resilient cellular backhaul across all four UK carriers, PCI DSS payment isolation at the SIM level, remote firmware updates, and single-pane fleet monitoring across the entire estate.
A compliance-intensive, distributed estate
EV charging is one of the most compliance-intensive sectors in connected infrastructure. Every charger processes payments, communicates with backends, and participates in grid management, deployed across distributed locations with no on-site IT.
- Every charger handles payment card data subject to PCI DSS 4.0
- Backend communication required for OCPP, grid balancing, and availability reporting
- Distributed locations with no on-site IT staff or fixed-line connectivity
- Firmware updates must be delivered securely and remotely across the fleet
- Multiple overlapping regulatory frameworks with audit and evidence requirements
Multi-network SIMs for EV charge point operators
SIMSY supplies the SIM cards, connectivity, isolation and compliance evidence that charge point operators need — without adding hardware or complexity at every site.
- Multi-network SIM cards with automatic failover across all four UK carriers
- Multi-APN traffic segregation for payment isolation at the SIM level
- Secure remote firmware updates without site visits
- Fleet-wide monitoring with anomaly detection across the entire estate
- No public internet exposure, all traffic stays on private infrastructure
- Compliance evidence generated automatically for audit readiness
What the platform delivers
Multi-Network SIM Cards
Each SIMSY SIM roams across EE, VodafoneThree and O2 automatically in the UK, as well as supporting multiple networks in most countries across Europe and America. Especially important for rural, motorway and destination chargers where single-carrier coverage is patchy.
Multi-APN PCI DSS Isolation
Payment card traffic and device management traffic run on completely isolated logical networks on a single SIM. PCI DSS 4.0 segmentation achieved at the SIM level with no additional site hardware.
Remote Firmware Updates
Push firmware updates securely to any charger in your estate without dispatching an engineer. Updates are delivered over the private network with full audit logging.
Proactive Offline Alerts
The moment a charger loses connectivity, you know about it. Power outage, network fault or hardware failure — the alert reaches your team before any customer has a chance to report it.
Fleet Monitoring
Real-time visibility across every charger in your estate. Connectivity status, data usage, uptime history, and anomaly detection, per charger, per site, per client.
Private Network
All traffic stays on private infrastructure. No public internet exposure means no publicly routable attack surface for your charging estate.
Compliance Evidence
Automated compliance evidence generation for EU CRA, NIS2, PCI DSS 4.0, and UK Smart Charge Point Regulations. Audit-ready documentation without manual effort.
Before and after SIMSY
What this means for your operation
Frequently asked questions
For an EV charger you want a multi-network SIM with remote management. Multi-network means the SIM can roam across more than one UK carrier, so the charger stays online at rural, motorway and destination sites where any single carrier can have gaps. Remote management means you can provision, monitor and troubleshoot every SIM from one place without visiting site. SIMSY provides both as standard, along with the PCI DSS-grade payment isolation that charge point operators typically need.
Yes — and for most operators it is the sensible default. A multi-network SIM automatically picks the strongest carrier available at each charge point, and fails over between carriers if the primary drops. This removes the biggest source of unexplained downtime on distributed EV estates, which is single-carrier coverage variation site by site. SIMSY SIMs roam across all four UK mobile networks (EE, Vodafone, O2, Three) on the same SIM.
Yes. Modern EV charge points depend on a live connection to accept payments, report availability, communicate with the operator's backend (typically over OCPP), and participate in grid balancing. UK Smart Charge Points Regulations also require chargers to maintain connectivity and report status in real time. Cellular SIMs are the standard way to deliver this — they work without dependency on the site's own broadband, and multi-network SIMs like SIMSY's give the resilience the regulations expect.
Yes. Every SIMSY SIM can be provisioned, monitored, throttled, suspended, reactivated and diagnosed remotely through the SIMSY platform, API, CLI or MCP server. That includes real-time connectivity status, offline alerts, and full data-usage visibility per charger. For estates of any real size this typically replaces a spreadsheet-and-callouts operating model with something that plugs into whatever operations dashboard the team already uses.
Yes. Multi-APN creates completely isolated logical networks at the SIM level, meaning card payment traffic and device management traffic never share the same network path. This satisfies the PCI DSS 4.0 requirement for cardholder data environment segmentation without any changes to hardware or software at the charger.
Most operators migrate in batches, prioritising new installations first and swapping existing SIMs on a planned schedule. We work with you on the plan so there are no connectivity gaps during the transition. Most operators are fully transitioned within a few weeks.
Ready to talk?
We are the founders. Drop us a direct email and we will arrange a call. No booking forms, no automated sequences. A straight conversation about your charging estate and how SIMSY can help.