Quick Answer
For critical utility and infrastructure applications, LTE450 private networks are almost always preferable to public LTE MVNO arrangements. The key differentiators are: dedicated spectrum (no congestion from consumer demand), full QoS control (guaranteed latency for SCADA and protection), complete security control (private APN, own HSS, own routing), and coverage optimised for infrastructure assets rather than population centres.
Key Differences at a Glance
| Criteria | LTE450 Private | Public LTE MVNO |
|---|---|---|
| Spectrum | Dedicated licensed band | Shared public band |
| Congestion | No consumer congestion | Consumer congestion at peak times |
| QoS control | Full operator control | MNO policy, no utility control |
| Coverage | Designed for infrastructure sites | Designed for population centres |
| Rural coverage | 50-80 km cell radius | Patchy, dependent on MNO investment |
| Security | Own HSS, own APN, no 3rd party | Shared infrastructure |
| Availability SLA | Operator defines target | Typically 99.9% (not utility grade) |
| Data routing | Private, isolated OT traffic | Public internet or private APN (extra cost) |
| Capex | High (network build) | Zero/low |
| Opex per device | Lower at scale | Per-SIM monthly cost |
| Time to deploy | 18-36 months | Immediate (SIM in device) |
When Public LTE is Acceptable
Public LTE via MVNO is not always the wrong choice. For smaller utilities with limited geographic coverage requirements, for monitoring applications with high tolerance for occasional connectivity loss (non-critical asset monitoring, agricultural applications), or for pilot projects before a full private LTE450 commitment, public LTE may be the pragmatic starting point. The key questions are: what is the consequence of a few minutes or hours of connectivity loss? And does public coverage actually reach all the required sites?
Frequently Asked Questions
Yes – a hybrid approach uses LTE450 as the primary network for mission-critical traffic (SCADA, protection, AMI) while public LTE provides coverage for non-critical monitoring or serves as a secondary failover path. Multi-WAN industrial routers supporting both a primary LTE450 SIM and a secondary public LTE SIM, with automatic failover between them, are commercially available from vendors including Teltonika and Robustel.
For AMI applications in areas with good public LTE coverage, MVNO arrangements have been used successfully, particularly for initial rollouts before dedicated utility networks are available. However, rural coverage gaps, congestion events, and the inability to guarantee QoS for time-critical meter commands (remote disconnect) are limitations. As utility meter data volumes grow with more granular reporting, the capacity advantages of a dedicated LTE450 network become more compelling.