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Starlink Mini changed the game for van internet. It draws 20-40W, weighs under 1kg, and gets you 50-200 Mbps almost anywhere. Mounting it on a van roof and powering it from 12V is straightforward — here's exactly how.
Power setup: Starlink Mini runs on USB-C PD at 20V. The cleanest van solution is a 12V to USB-C PD adapter ($15-25) that plugs into your 12V system and outputs 20V/3A. Draws 1.5-3.5A from your 12V battery depending on weather conditions and signal processing load. Daily consumption: 250-500Wh depending on usage hours.
⚡ Expert tip
Power the Starlink from a switched 12V circuit — not a permanent one. When you're not using internet (sleeping, hiking), that 20-40W idle draw adds up. An easy toggle switch on the dashboard saves 200-400Wh/day when you're off-grid and not online.
Example calculation for your setup
Results based on a typical use case
| Appliance | Power | Usage/day | Wh/day |
|---|---|---|---|
| Compression fridge | 45W | 24h | 1080 |
| LED lighting | 20W | 4h | 80 |
| Water pump | 30W | 0.5h | 15 |
| Phone charging | 15W | 2h | 30 |
| Daily consumption | 1205 Wh | ||
Recommended LiFePO4 battery
126 Ah
(80% depth of discharge)
Recommended AGM battery
201 Ah
(50% depth of discharge)
Recommended solar panels
302 Wc
4h average sun hours
Recommended inverter
No 220V appliances — no inverter needed
Adjust these values with the calculator below
VANPOWERCALC PROYOUR ENERGY PROFILE
YOUR ENERGY PROFILE.
This document contains the sizing of your future electrical installation, calculated based on your appliances.
Minimum Daily Consumption
0 WH / DAY
Inventory:
SYSTEM SIZINGPage 2
Battery
To guarantee 0WH without damaging your bank (80% max discharge):
0 AH
LiFePO4 12V
Solar
Minimum power required to recharge your consumption:
0 W
via MPPT
220V AC
Maximum power (with 25% safety margin).
0 W
No Need
Safety & CablingPage 3
12V Cable Sizing Guide
Use this professional reference table to select the correct gauge (mm²) for your cables. For 12V in a van, the maximum tolerated voltage drop is 3%. Always use multi-stranded flexible automotive wire.
| Current (A) | Round trip < 2m | Round trip 4m | Round trip 6m |
|---|---|---|---|
| 5A (LEDs, USB) | 1.5 mm² | 2.5 mm² | 4 mm² |
| 10A (Fridge, Pump) | 2.5 mm² | 4 mm² | 6 mm² |
| 20A (Heater) | 4 mm² | 10 mm² | 10 mm² |
| 50A (DC/DC Booster) | 10 mm² | 16 mm² | 25 mm² |
| 100A (Inverter) | 25 mm² | 35 mm² | 50 mm² |
Fuse Sizing
The fuse protects the wire, not the appliance. Always place it as close to the power source as possible (battery or busbar).
- Wire 1.5 mm² → Max fuse 10A
- Wire 2.5 mm² → Max fuse 20A
- Wire 4 mm² → Max fuse 30A
- Wire 6 mm² → Max fuse 40A
- Wire 10 mm² → Max fuse 60A
SCHÉMA ÉLECTRIQUE
PANNEAUX SOLAIRES
0W
REGULATEUR MPPT
BATTERIE AUXILIAIRE
0 Ah
Lithium LiFePO4
FUSIBLE
FUSIBLE
BOÎTE À FUSIBLES 12V
Pompe, Leds, Frigo...
CONVERTISSEUR 220V
NON REQUI
PRO GEARPage 4
SHOPPING LIST
Where to find this equipment? Here is the community-approved selection.
12V 6-way Fuse Box
Mandatory protection
Digital Multimeter
Test your connections
Heavy Duty Crimping Tool
For perfect lugs
Heat Shrink Tubing
Insulation and safety
GENERATED BY VANPOWERCALC PRO - UNLIMITED.
About this tool
For mounting, I use a simple magnetic mount on the roof — Starlink Mini has a flat bottom that works with adhesive metal plates. But for highway driving you need something more secure. A low-profile L-bracket bolted to the roof rack rail with a quick-release clamp works best. I drilled two holes in a piece of aluminum angle, bolted it to my Sprinter's roof rail, and the dish clips in and out in 10 seconds. For cable routing, the USB-C cable is thin enough to pass through a standard cable gland alongside your solar cables. The key thing about Starlink in a van: it works best with a clear sky view. Trees, buildings, and mountain valleys cause dropouts. The app's obstruction checker shows you exactly what sky coverage you get at any parking spot — check it before settling in for the night.
Frequently asked questions
How much power does Starlink Mini use in a van?▼
20-40W during operation, 1.5-3.5A from 12V. Daily: 250-500Wh depending on how many hours it runs. Standby/searching mode uses more power than active streaming. In snow or heavy rain, power draw increases as the dish heats itself.
Can I run Starlink Mini from a 100Ah battery?▼
Yes, for moderate use. 8 hours of Starlink at 30W average = 240Wh = 20Ah. That's 20% of a 100Ah battery. Manageable alongside a fridge and lights, but you'll need solar or driving to recharge daily.
How do I power Starlink Mini from 12V?▼
USB-C PD adapter from 12V — multiple brands on Amazon for $15-25. It converts 12V DC to 20V USB-C PD that the Starlink Mini needs. Don't use a cheap USB-C cable — use the one Starlink provides or a certified PD cable rated for 60W+.
Best way to mount Starlink Mini on a van roof?▼
For stationary use: magnetic mount or adhesive metal plate on the roof. For driving: L-bracket on roof rail with quick-release clamp. The dish needs to be flat/horizontal for best signal. Avoid mounting near solar panels — the cable runs are already crowded there.
Does Starlink work while driving?▼
Starlink Mini officially supports in-motion use (with the appropriate service plan). Signal quality drops during fast movement and in urban areas with obstructions. On highways through open terrain, it works surprisingly well at 100+ km/h.