Starlink’s specification sheet for the Starlink Mini lists an average power consumption of 25–40W and a DC input rating of 12–48V at 60W. Converting those watts into amps is what you need for sizing a battery, a fuse or a wire run, and the answer changes a lot with voltage. At 12V, the Mini draws roughly 2.1 to 3.3 amps on average and up to 5 amps at its 60W rating. At 24V, those numbers are cut in half. This guide walks through the math, with tables for 12V, 24V and the lithium voltages in between, plus what the amps mean for battery runtime.
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Power figures come from Starlink’s Starlink Mini specifications. The amp and runtime numbers are calculated from those ratings and are estimates; your Mini’s real draw depends on weather, heat, snow-melt and how many devices are online. On my own setup, documented in our BLUETTI Elite 30 V2 and Starlink Mini review, the station’s display showed the Mini drawing about 22W, a little under Starlink’s average range.
The Formula
Amps equal watts divided by volts: A = W ÷ V. A 30W load on a 12V system draws 30 ÷ 12 = 2.5A. The same 30W on a 24V system draws 1.25A. Power stays the same; current falls as voltage rises.
Starlink’s spec sheet gives three useful power numbers for the Mini:
| Figure | Value | Use it for |
|---|---|---|
| Average consumption, low end | 25W | Mild weather, light use (runtime planning) |
| Average consumption, high end | 40W | Heavier use, heat or cold (conservative runtime planning) |
| Input rating | 60W | Sizing wire, fuses and converters |
| DC input voltage range | 12–48V | Confirms 12V and 24V systems are within spec |
| USB-C PD requirement | 100W, 20V/5A minimum | Using Starlink’s USB-C to barrel cable |
Starlink Mini Amps by Voltage
Calculated at the dish’s input. These are straight W ÷ V figures, rounded.
| System voltage | At 25W | At 30W | At 40W | At 60W (rating) |
|---|---|---|---|---|
| 12V (nominal lead-acid / car) | 2.1A | 2.5A | 3.3A | 5.0A |
| 12.8V (LiFePO4 nominal) | 2.0A | 2.3A | 3.1A | 4.7A |
| 13.6V (vehicle, engine running) | 1.8A | 2.2A | 2.9A | 4.4A |
| 20V (USB-C PD) | 1.25A | 1.5A | 2.0A | 3.0A |
| 24V (truck, boat, or step-up output) | 1.0A | 1.25A | 1.7A | 2.5A |
| 25.6V (24V LiFePO4 nominal) | 1.0A | 1.2A | 1.6A | 2.3A |
| 48V (48V battery bank) | 0.5A | 0.6A | 0.8A | 1.25A |
For most planning, use the 40W column for runtime and the 60W column for anything safety-related, such as fuse and wire choices.
Battery-Side Amps When You Use a Converter
Many 12V owners run the Mini through a step-up converter that boosts 12V to 24V or 30V. Boosting doesn’t create energy, so the battery side still supplies the full wattage, plus the converter’s losses. Assuming about 90% converter efficiency (an estimate; check your converter’s spec), the current drawn from a 12.8V battery looks like this:
| Mini draw | Battery side, direct at 12.8V | Battery side, via ~90% step-up | Converter output at 24V |
|---|---|---|---|
| 25W | 2.0A | 2.2A | 1.0A |
| 30W | 2.3A | 2.6A | 1.25A |
| 40W | 3.1A | 3.5A | 1.7A |
| 60W | 4.7A | 5.2A | 2.5A |
The converter costs you around 10% more battery current, but the long cable between the converter and the dish carries half the amps, which cuts voltage drop over that run. Whether that trade is worth it depends on your cable length. Our Starlink Mini step-up converter guide covers when one makes sense.
Amp-Hours Per Day
Amp-hours (Ah) tell you how much of a battery’s capacity you use. Multiply amps by hours of use. These estimates are at 12.8V, direct connection, no converter losses.
| Hours per day | At 25W (~2.0A) | At 30W (~2.3A) | At 40W (~3.1A) |
|---|---|---|---|
| 4 hours | ~8Ah | ~9Ah | ~12.5Ah |
| 8 hours | ~16Ah | ~19Ah | ~25Ah |
| 12 hours | ~23Ah | ~28Ah | ~37.5Ah |
| 24 hours | ~47Ah | ~56Ah | ~75Ah |
At 24V, divide those Ah numbers by two. The watt-hours are the same; a 24V battery with the same Ah rating simply stores twice the energy.
What That Means for Common Batteries
These runtime estimates assume a LiFePO4 battery used to about 90% of rated capacity, the Mini at 30W average, and a direct DC connection. With an inverter and the AC power supply instead, expect noticeably less.
| Battery | Energy | Approximate runtime at 30W | At 40W |
|---|---|---|---|
| 12V 50Ah LiFePO4 | 640Wh | ~19 hours | ~14 hours |
| 12V 100Ah LiFePO4 | 1,280Wh | ~38 hours | ~29 hours |
| 12V 200Ah LiFePO4 | 2,560Wh | ~77 hours | ~58 hours |
| 24V 100Ah LiFePO4 | 2,560Wh | ~77 hours | ~58 hours |
For the full method with other appliances, see our 100Ah battery runtime guide, and for a larger bank, our 200Ah Starlink runtime breakdown.
Sizing Fuses and Wire
Size protection for the Mini’s 60W input rating, not its average. At 12V that’s 5A, so the circuit needs a fuse that sits above normal draw but protects the wire. A common approach is to choose the wire first, then use a fuse rated at or below what that wire can safely carry. For short 12V runs, wire in the 16–14 AWG range comfortably handles 5A; longer runs need thicker wire to limit voltage drop, not for heat. Follow your converter’s and fuse holder’s instructions, and if in doubt, have a qualified installer check the circuit.
Voltage drop is the bigger issue at 12V. Because the Mini’s lower limit is 12V, a run that loses even half a volt can push it out of spec when a battery is partly discharged. Running at 24V halves the current, which halves the voltage lost in the same cable, and that smaller loss is also a smaller share of the higher voltage. Our Starlink Mini 12V setup guide walks through cable choices.
Measuring Your Own Mini
Spec-sheet averages are a starting point. To see your actual draw:
- Power station display: most show output watts per port. Divide by the port voltage for amps.
- Inline DC meter: a meter wired between the battery and the dish shows volts, amps and accumulated Ah.
- Battery monitor or shunt: a shunt-based monitor tracks current and state of charge over days. Our Renogy Shunt 300 review covers one option.
Watch the numbers over a full day. Draw can rise when the Mini is heating to melt snow or working harder in heat, and it can dip below the average in mild weather.
Worked Example: A Weekend in a Van
Here’s how the numbers come together for a typical setup. All figures are estimates.
- System: 12V 100Ah LiFePO4 battery, a 12V-to-24V step-up converter, the Mini on Starlink’s DC cable.
- Use: the Mini online 10 hours a day, averaging 35W.
- Battery current: 35W ÷ 0.9 converter efficiency ÷ 12.8V ≈ 3.0A.
- Daily use: 3.0A × 10 hours ≈ 30Ah, or about 390Wh.
- Two days: about 60Ah, leaving roughly 30Ah of usable capacity for lights, phones and a fan, before any recharging.
Add a 12V fridge, which can use 30–50Ah a day by itself, and the same battery runs short in a weekend unless solar or an alternator charger tops it up. A 100–200W solar panel or a DC-DC charger on the drive closes that gap. This is where tracking amps pays off: a few hours with a meter will tell you more than any estimate.
Amps Compared With Other Gear
To put the Mini’s current in perspective, here are typical 12V draws for other common loads. These are rough, general estimates; check your own devices.
| Device | Typical 12V draw (estimate) |
|---|---|
| Starlink Mini (25–40W average) | ~2–3.3A |
| LED interior lights | ~0.5–2A |
| Phone charging via USB | ~1–2A |
| Laptop via a 12V USB-C charger | ~4–6A |
| 12V compressor fridge while running | ~3–5A (cycles on and off) |
| Roof vent fan, medium speed | ~1–3A |
In other words, the Mini is a moderate load. It draws a similar current to a 12V fridge when the compressor is running, but it runs continuously while it’s on, so over a day it can use about as much as the fridge does.
FAQ
How many amps does a Starlink Mini draw at 12V?
About 2.1–3.3A on average, based on Starlink’s 25–40W rating, and up to 5A at its 60W input rating.
How many amps at 24V?
About 1.0–1.7A on average, and up to 2.5A at 60W.
Can a Starlink Mini run directly from 12V?
12V is within Starlink’s 12–48V input range, but it’s at the very bottom. Voltage drop on long or thin cables can take it below 12V, which is why many owners use a step-up converter.
How long will a 100Ah battery run a Starlink Mini?
Our estimate is about 29–38 hours for a 12V 100Ah LiFePO4 battery at 30–40W average draw, connected directly over DC.
What size fuse should I use?
Base it on the 60W rating (5A at 12V) and the wire you choose, and follow your converter’s instructions.
Does USB-C power use fewer amps?
At 20V USB-C PD, the Mini draws about 1.25–2A on average. Starlink requires a 100W, 20V/5A minimum source with its USB-C cable.
Bottom Line
Plan on about 2.5–3.3A at 12V and 1.25–1.7A at 24V for typical Starlink Mini use, and size wiring and fuses for 5A at 12V. Higher system voltage means fewer amps and less voltage drop, but the energy you use from the battery is the same, so runtime depends on watt-hours, not volts.