Does fleet tracking update when the engine is off?

Fleet tracking still shows where a vehicle is when the engine is off: the last reported position stays on the live map. Whether the tracker keeps reporting while the vehicle is parked, and which alerts it can raise, depends on the device and how it is set up. Check this before you buy, because a parked vehicle is when most theft and unauthorised-use problems happen.

Why this matters in 2026

Most fleet questions are about moving vehicles. Yet vans left on a driveway overnight, HGVs parked at a depot and cars left on a street all spend most of their time with the engine off. A tracker that only tells you about journeys leaves that time unwatched.

Two different jobs get mixed up here. Fleet visibility tells you where a vehicle is and where it has been. Vehicle security tells you when something happens to a parked vehicle. They are not the same product, and the answer to the engine-off question differs for each.

Does fleet tracking update when the engine is off?

Yes, for location history. The map keeps the last known position, and the journey record shows where the vehicle stopped. When the engine starts again, the next journey begins from that point.

What varies is what happens in between. These are the questions to ask for any tracker:

• Does the device keep sending position updates while the ignition is off, or does it wait for the next start?
• Does it raise an alert if the vehicle moves with the ignition off?
• Does it alert on tampering, such as the vehicle battery being disconnected?
• Is a monitoring centre watching those alerts, or do they only reach you?

Crystal Ball does not publish a single parked-reporting rule that fits every product, so the answers below are split by product. Confirm the exact behaviour of your chosen configuration on the live product page or with the Crystal Ball team before you commit.

FleetTracker: what you see when the vehicle is parked

FleetTracker is built for visibility, not theft recovery. With the engine off you can still open the portal and see where each vehicle was left, how long it has been there and the journey that ended there.

That supports practical jobs:

• Confirming a van is at the depot or customer site at the end of a shift.
• Checking whether a vehicle was used outside working hours, using journey history.
• Reviewing where a vehicle stopped and for how long.

Geofences add a boundary around a site, so movement in or out of it can be flagged. Read how geofences support fleet control for how to set them up sensibly.

Pros: clear records, no per-incident monitoring needed, suits cars, vans and HGVs.

Cons: FleetTracker is not a monitored Thatcham tracker. Do not treat it as professional theft-recovery monitoring. It also has no camera footage.

Verdict: FleetTracker suits managers who want to know where vehicles are and where they have been. Buy it for visibility, not for monitored theft protection.

Thatcham S7: alerts while the vehicle is parked

The Crystal Ball Thatcham S7 tracker is a monitored security product. The live product page lists real-time location, journey history, tow and tamper alerts, incident mode and service mode. A tow alert exists for exactly the engine-off case: a vehicle being moved when nobody has started it.

Service mode matters here. If a vehicle is going to a garage, you want to avoid false alarms, which is the purpose of that mode. Read the guide to tow and tamper alerts on Thatcham trackers for how those alerts work in practice.

S7 has no Automatic Driver Recognition (ADR), no driver fob and no immobilisation. Monitoring is required and is priced separately from the tracker. The headline price covers the tracker, VAT and nationwide professional installation at no additional cost.

Pros: monitored security, alerts aimed at parked-vehicle events.

Cons: no fob, no immobilisation, and monitoring is an additional cost.

Verdict: Thatcham S7 is the baseline choice when an insurer or buyer needs a monitored Thatcham tracker. Buy it where parked-vehicle security is the priority.

Thatcham S5: ignition and fob checks

The Crystal Ball Thatcham S5 includes everything verified on S7 and adds fob-based ADR. At ignition, if the authorised fob is not detected, the live page describes an unauthorised-driver or usage alert. The S5 page also confirms fob battery-status visibility, an additional fob option and tamper alerts when the vehicle battery is disconnected.

That last point answers a common worry. A tracker that depends on the vehicle battery needs a plan for what happens when the battery is disconnected. For the wider picture, see whether a Thatcham tracker runs off the vehicle battery.

S5 does not immobilise the vehicle. It alerts; it does not stop the engine.

Pros: adds authorised-driver recognition to S7 monitoring.

Cons: no immobilisation; monitoring is separate.

Verdict: Thatcham S5 suits fleets that need to know whether an authorised driver started the vehicle. Buy it when your insurer asks for the S5 category.

Thatcham S5 Plus: when the fob is absent

The Crystal Ball Thatcham S5 Plus adds immobilisation when the authorised fob is absent, exactly as the current product page describes. It is the highest monitored-security option Crystal Ball lists, and the only one where the vehicle can be stopped from starting without the fob.

Monitoring is required and priced separately, as with S7 and S5. Do not assume a value threshold decides which version you need. Your insurer's stated requirement and your own risk decide that.

Pros: alerts plus immobilisation.

Cons: the most involved of the three, and monitoring is separate.

Verdict: Thatcham S5 Plus is for vehicles where unauthorised starting is the main risk. Buy it when immobilisation is a requirement, not a nice-to-have.

Why engine-off behaviour varies

No two trackers behave identically when parked. These are the factors that decide what you actually get:

• Device type: a monitored Thatcham tracker is designed around parked-vehicle events; a basic visibility tracker is designed around journeys.
• Power source: how the device is powered determines what it can do with the ignition off.
• Configuration: alert types and who receives them are set per account.
• Monitoring arrangement: whether a centre handles alerts, or only you see them.
• Connectivity: a vehicle in a basement car park or remote site may not report until it regains signal. See whether vehicle tracking works with no mobile signal.
• Service and garage visits: alerts may need to be paused so a repair does not raise a false alarm.

Can I see if a van was used outside working hours?

Yes. Journey history shows any trip that happened outside working hours, including the start, the route and the stop. Treat it as a record of an observed journey, not proof of who was driving or why.

If you plan to review out-of-hours use, tell drivers first and follow ICO guidance on monitoring workers. The guide on tracking company vans outside working hours covers the employer side.

Do I need monitoring for engine-off alerts?

For a monitored Thatcham tracker, yes: monitoring is required and priced separately from the headline price. For FleetTracker, alerts go to your own users through the portal, with no monitoring centre involved. The right choice depends on whether you want a person acting on a parked-vehicle alert or want to watch the fleet yourself.

Does a tracker with the engine off drain the vehicle battery?

Any device powered from the vehicle draws some current. How much, and how that is managed, depends on the device. Ask the supplier about parked power use, especially for vehicles left unused for long periods, and read the battery guide linked above.

Questions to ask before you buy in 2026

1. What does the device report with the ignition off, and how often?
2. Which alerts are raised for a parked vehicle, and who receives them?
3. Is monitoring required, and what does it cost on top of the tracker?
4. What happens when the vehicle battery is disconnected?
5. Is installation included, and by whom?
6. How does the device behave in service or garage mode?

Ask for the answers in writing for the exact product you are quoted.

FAQ

One last thing

Do not buy on the headline feature list alone. Ask each supplier to describe, step by step, what happens when a parked vehicle is moved at 3am: who is alerted, how fast, and what they can do. That one answer separates a visibility tracker from a security product.