5G Connectivity and Remote Siren Activation on Solar Units

VuePoint's deployable units now run full 5G connectivity, with the ability to trigger an on-unit siren remotely. Both went onto hardware that has to run through the night on a battery charged by a panel — which is where the actual difficulty was.

Why 5G is a power problem, not a networking one

On a mains-powered installation, adding a 5G modem is a procurement decision. On a solar unit it is a design constraint that propagates through everything else.

A cellular modem's draw is not constant — it spikes during transmission, and it spikes hardest when signal is marginal and the radio increases power to hold the link. Marginal signal is the normal condition on exactly the sites these units are built for: the far corner of a holding, a yard between structures, a site where the nearest tower is a long way off. So the worst-case power draw and the worst-case operating environment are the same environment.

That interacts badly with the other loads. The IR illuminator draws hardest after dark, which is when the panel is producing nothing. Any housing heater runs in winter, when the panel produces least and the battery holds least. Stack a transmitting radio on top of both and the naive design browns out in week three of a deployment — which is exactly the failure pattern we have written about.

• Duty cycling the radio rather than holding a session open continuously, so transmission happens in bounded windows.
• Doing the analysis on the unit, so what needs transmitting is an event and a still rather than a video stream — this cuts radio-on time by orders of magnitude.
• Power sequencing on the board, so the radio and the illuminator are not both at peak draw at the same instant.
• Designing to the worst multi-day stretch in the darkest month at the deployment latitude, rather than to an annual average.

The siren output

Adding an actuated output to a low-power board introduces a different class of problem. A siren is a high-current load on hardware otherwise engineered to sip power, and it has to fire reliably from a device that spends most of its life in a low-power state.

That means isolating the load so its inrush cannot disturb the rest of the board, holding enough reserve that firing the siren cannot itself take the unit offline, and building the command path so the unit fails safe: a lost link results in a silent unit, never a stuck-on one. The failure mode being designed against is not "the siren does not sound" — it is "the siren sounds at 3am on an empty site and nobody can stop it."

What 5G changes in practice

Higher throughput matters less than people expect here, because the architecture deliberately avoids sending video. What matters more is latency and uplink behaviour: the gap between something being detected on the unit and a person seeing it on a phone, and the reliability of a small uplink message when the network is busy. Those are the numbers that determine whether an alert is actionable or merely accurate.

About VuePoint

VuePoint Secure is an AI software company based in Las Vegas, Nevada. Its analytics run on cameras customers already own as well as on its own solar-powered deployable units.