Starlink Mini and heat: what happens on a hot roof

Heat is one of the first things people ask us about, and it deserves a straight answer. A Starlink Mini on a vehicle roof can get too hot, but it happens in a narrower set of conditions than most people expect. Here is when heat matters, what the dish does about it and what actually helps.

What Starlink publishes

Starlink's specification sheet lists the Mini's operating temperature as minus 30°C to 50°C. The same sheet lists average power consumption of 25 to 40W, and nearly all of that power ends up as warmth inside a compact dish. So the Mini is making its own heat on top of whatever the sun and the roof are adding.

When heat is not a problem

When the vehicle is moving, air flows over and around the dish, and that airflow is normally enough for any mount. A mild day, a breeze or a shady park all help too.

When it is

The real risk case is being parked on a hot day with no breeze. The sun is on the dish, the roof underneath has soaked up heat, and there is no moving air to carry any of it away. Most heat complaints are at their worst when the vehicle is standing still: stopped for lunch, set up at camp in the afternoon or parked at a work site.

What the dish does when it gets too hot

The Mini protects itself. The dish's software has two heat protection states, called thermal throttle and thermal shutdown. In plain terms, it first winds itself back to shed heat, and if it keeps getting hotter it switches off until it has cooled down. The Starlink app shows alerts, so it is the first place to look when the connection drops.

That is the dish looking after itself, not a fault. It does mean you can lose your connection right when you have stopped to use it.

Is it heat, or is it power?

Power problems are sometimes mistaken for heat, because both tend to show up when you are parked. With the engine off, battery voltage settles lower, and a long cable run can leave the dish short of voltage. The result looks similar: the dish drops out or restarts.

A quick way to tell them apart is to check the Starlink app for a heat alert. If there is none, and especially if the dish recovers as soon as the engine starts, look at the power side first. Our guide to 12V voltage drop explains what to check.

Habits that help

• Park in shade when you can, as long as the dish still has a clear view of the sky.
• Switch the dish off when you are not using it. It stops making its own heat and it saves your battery.
• Keep the space under and around the mount clear so air can move through it.
• If the dish does shut down, give it time to cool. Shade and moving air both help.

How thermostatic fans help

This is the part of our mount we thought hardest about. A lid over the dish protects it, but any housing can also hold warm air when the vehicle is standing still. So we did two things.

First, we left the base open. The top face over the dish is closed to dust and weather, and the slotted base is open, both for universal mounting and for ventilation.

Second, we fitted two IP67 rated 12V cooling fans on a thermostat. They switch on at around 45°C, which is before the 50°C maximum Starlink publishes, and they move air through the mount when there is no breeze to do it. We chose high output fans that run in short bursts and then switch off, rather than fans that run constantly. They are not meant to be running all day.

We do not promise a certain number of degrees, or that a dish will never shut down in extreme heat. What we can say is that the fans cut in before Starlink's published maximum, in the parked, still air conditions where heat is a real problem, and that every unit is powered up and its fans are tested before dispatch.

If you would like to see how it goes together, the Fan-Cooled Rooftop Power Hub page shows the fans and the open base, and our mounting guide covers the install.