How does trailer GPS tracking work?
A plain-English guide to what's inside a trailer tracker, how it phones home from the middle of nowhere, and what it costs to run.
The three pieces
- Positioning (GNSS). The tracker listens to multiple satellite constellations — GPS and GLONASS — and computes its own latitude and longitude. Using more than one constellation keeps positions accurate in dense yards, urban canyons, and near buildings where single-constellation GPS struggles.
- Reporting (LTE-M). The tracker transmits each position over LTE-M, a cellular standard built specifically for IoT devices. LTE-M matters for trailers for two reasons: it sips power (which is what makes months of battery life possible), and it has deep rural coverage across the US and Canada — trailers don't stay on the interstate.
- Platform. Positions land in a tracking platform that draws the live map, fires geofence alerts, and rolls breadcrumbs up into mileage and activity reports.
Why trailer trackers are battery-powered
A trailer spends most of its life dropped — in a yard, at a dock, at a truck stop — with no power on board. A hardwired tracker goes dark the moment the pigtail is disconnected, which is exactly when trailers get stolen or lost. So trailer trackers carry their own battery: the TruckerPro TP057, for example, runs months on an internal 2200 mAh cell and mounts magnetically with no wiring at all.
Battery trackers manage power by reporting on a schedule rather than continuously — say, every several minutes in motion and a few check-ins a day at rest. More frequent reporting gives a finer track; less frequent reporting stretches the battery.
What is a geofence?
A geofence is a virtual boundary drawn on the map — around your yard, a customer site, or a lane. When a tracked asset crosses it, the platform sends an alert. It's the workhorse of theft detection: a trailer easing out of the yard at 2 AM triggers an alert while there's still time to act, and the tracker's breadcrumb trail supports recovery afterward.
What about mileage and IFTA?
Because the tracker records a continuous trail of positions, the platform can total miles by jurisdiction — the raw material for IFTA fuel-tax reporting and audit responses. Reports export directly, so quarter-end stops being a paper chase.
What does it cost?
Across the industry, expect roughly $100–200 for hardware plus $15–35 per month per asset, often with a multi-year contract. TruckerPro's model is simpler: $249 buys the TP057 trailer tracker with the first year of service included, renewing at $19.99/mo after that — no contract, cancel any time and keep the hardware. The hardwired TP056 for powered vehicles is $199 with the same terms ($16.99/mo renewal).
Frequently asked questions
Does a trailer GPS tracker work without power?
Yes — that's the point of a battery-powered trailer tracker. The TP057 runs on an internal 2200 mAh battery and keeps reporting for months on a trailer with no power source at all.
What is LTE-M?
LTE-M is a cellular network standard purpose-built for IoT devices. It uses far less power than regular LTE, penetrates buildings and trailers better, and has deep rural coverage across the US and Canada.
How accurate is trailer GPS tracking?
Multi-constellation GNSS (GPS + GLONASS) typically places an asset within a few meters in open sky, and holds up better than single-constellation GPS in dense yards and near buildings.
Do I need a subscription?
Every cellular tracker needs a data service to report. TruckerPro includes the first year with the hardware; after that it's $19.99/mo for the TP057 (or $16.99/mo for the TP056), with no contract.
Track your first trailer for $249
TP057 wireless tracker + 1 year of service included · no contracts.