Trailer GPS Tracking: Power, Battery Life and Choosing the Right Device

Why trailer tracking differs from vehicle tracking

• No continuous ignition cycle like a daily driver van
• Long unpowered or lightly powered periods when parked or uncoupled
• Exposure, vibration and weather on chassis mounts
• Theft and abandoned-asset scenarios after decoupling
• Need to know “where is the trailer” separately from “where is the tractor”

A tracker designed for constant vehicle power can go offline the moment the trailer is parked without a reliable feed. That is why battery life, sleep modes and harvest from trailer lighting circuits matter more than live map polish in a brochure.

Power options for trailer trackers

Ask your installer which circuits are available on your trailer types, whether the unit backs up on battery when the suzi is unplugged, and how the device reports low battery. Do not assume a van OBD-style unit will survive trailer duty.

Battery life: reporting interval vs longevity

Battery-powered trailer trackers almost always trade update frequency for longevity. A position every few minutes drains faster than a daily heartbeat plus motion wake-ups. Decide what “enough” means: recovery after theft, weekly utilisation, or near-live yard management.

• Define the longest acceptable gap between reports when parked
• Ask how motion or geofence wake-ups change battery drain
• Plan who replaces or recharges packs — and where the spare sits
• Test a sample trailer through a real parked week before fleet rollout

Choosing the right device class

If you only need to know where the artic is while coupled, a quality tractor tracker may be enough. If trailers are dropped overnight or hired in and have usable external power, specify FMC234 with your installer. Pure unpowered long-park duty cycles may still need a specialist battery trailer product outside FleetPro’s catalogue.

What FleetPro Tracking covers today

FleetPro Tracking positions FMC003 (OBD — see live catalogue pricing) for vans, FMC650 (from £89.99 ex VAT) for HGVs, and FMC234 for powered trailers and similar assets that can supply 10–30 V, with Essential £6.99, Pro £9.99 and HGV + Tacho £14.99 plans per tracker per month ex VAT. FMC234’s backup battery extends runtime after power loss — it is not a certified long-life unpowered-only trailer tracker. See FMC234 in the FleetPro shop, FMC003 in the FleetPro shop and FMC650 in the FleetPro shop.

Operational habits that make trailer GPS useful

• Record trailer ID against jobs so “lost” means a named asset, not a rumour
• Park high-value trailers with lighting and CCTV where practical
• Treat offline trailers as exceptions that need a human chase
• Separate trailer location from drivers’ hours and tachograph analysis duties

GPS does not replace physical security or contract clauses with customers who hold your trailers. It supports investigation when something is already wrong.

Questions operators ask

Does FleetPro sell a trailer tracker?

Can I put an FMC003 on a trailer?

No. We do not position the FMC003 OBD van tracker (or FMC650 HGV terminal) as a trailer asset tracker — powered trailers are positioned on FMC234. Unpowered long-park duty cycles may need a specialist supplier.

Is tractor GPS enough?

Sometimes, while coupled. It is blind when the trailer is dropped. Decide based on how often trailers leave the tractor.

Where do vehicle tracking plans live?

See fleet GPS tracking.