Portable power for off-grid Starlink: vans, boats and the inverter trap

In almost every off-grid van or boat setup, Starlink is the biggest continuous electrical load — the thing you size the battery around. Two things make this easier than the internet suggests: Starlink does publish its own power figures, and most kits can run directly on DC, skipping the inverter that quietly eats a chunk of your power budget.

What Starlink actually draws

Straight from Starlink's own Help Center:

Read the fine print, because it changes how you plan — all of this is Starlink's own wording:

• These are system-level figures — "the Starlink, WiFi router, power supply, and cables", not just the dish.
• They're AC-input averages, and "power utilization can vary depending on the temperature, location, and utilization".
• No peak figure is published anywhere. If someone quotes you a precise peak (boot-up, snow-melt), it isn't coming from Starlink.
• Performance (Gen 3) isn't in that table — its figure isn't currently published, so don't assume it matches Gen 2.

The maths — do it for your own setup

Daily energy is just average power × hours, in watt-hours. A Mini averaging around 30 W for eight hours is roughly 240 Wh a day; the same eight hours on a Performance kit is nearer 1,000 Wh. (That's arithmetic on Starlink's published averages — an illustration, not a runtime promise. Run the sum with your kit and your hours.)

Then the part people miss: rated capacity is not usable capacity. It depends on chemistry. Per RELiON (a lithium battery maker, so read it with that in mind), most lead-acid batteries lose significant cycle life if discharged below 50% depth-of-discharge, while LiFePO4 can be discharged to 100% — though they recommend 80% to preserve life. Lead-acid also gives up "up to 50%" of capacity at higher discharge rates, where lithium delivers its rated capacity regardless. In practice: a 1,000 Wh lead-acid bank might give you ~500 Wh you can actually use; a LiFePO4 one gives you most of it.

Skip the inverter — this is the big one

Starlink is a DC device. Powering it by turning battery DC into mains AC, only for the Starlink power supply to turn it back into DC, wastes energy at exactly the worst point on the curve. Victron's own measured efficiency data for a Phoenix 24/3000 inverter tells the story: about 93.9% efficient at 800 W, but only 83.0% at 100 W — and 33.3% at 10 W. A Mini idling at 15 W through a big boat/van inverter is sitting deep in that miserable low-load region.

Fortunately, Starlink sells and ships DC options for most kits:

• Starlink Mini is natively DC — a "power input rating of 12-48VDC, 60W", with a DC power cable in the kit. There's also an official car adapter (12–24 V) and a USB-C cable (needs a 100 W / 20 V-5 A PD source). Note Starlink says the car adapter is "currently only available in select markets" — check your own Starlink Shop.
• Standard 4 / 4X — the official Standard DC-DC Power Supply exists precisely for this, in Starlink's words "removing the need for an inverter when powered from your RV, car, boat, or battery pack" (12–48 VDC in, XT60 connectors). Also "select markets" — verify availability where you are.
• Performance (Gen 3) — the best case: its official setup guide lists both an AC power cable and a DC power cable in the box, with the Advanced Power Supply taking either. DC is standard equipment, not an add-on.

A genuinely useful field tip from Starlink's own setup notes: the Mini runs on 12–48 V, and "if you're experiencing issues while using a 12V power supply or battery, try reducing the cable length or using a thicker gauge cable." Voltage drop on a long thin 12 V run is a classic cause of mystery dropouts.

Choosing a power station (EU)

If you don't want to build a battery/solar/DC-DC system, a power station is the plug-and-play route. What actually matters: chemistry (LiFePO4 gives you more usable capacity and longer life), a DC output that suits your kit, solar input, and whether that specific model is expandable. All three mainstream brands sell into the EU — with real nuance worth knowing:

• EcoFlow — their own FAQ says the range uses "lithium-ion (Li-Ion), NCM, or lithium-ion phosphate (LiFePO4/LFP)" depending on the model. So don't assume LFP — check the model you're buying.
• BLUETTI — LFP on the mainstream Elite line, and a proper expansion-battery ecosystem — but the expansion batteries list compatibility with the Apex/AC/RV5 series, not the Elite line. Check compatibility before counting on expandability.
• Jackery — LiFePO4 reads as standard across its current EU catalogue. Expandability is a "Plus"-series feature: Jackery's own FAQ states plainly that the Explorer 2000 v2 is not expandable.

The lesson across all three: "expandable" is a product-line claim, never a brand one. And we don't print prices here — every one of these stores was running promotional pricing when we checked, and it'll be stale by the time you read this.

Sizing by setup

• Weekend camper: a Mini on the stock DC cable off a modest power station is plenty — you're talking a couple of hundred watt-hours a day.
• Full-time van / remote work: Mini or Standard on DC, a LiFePO4 bank sized from your own daily sum, solar to replace it, and DC-DC charging from the alternator for grey weeks. See the campervan connectivity guide.
• Boat: plan around the higher-draw kits and continuous use, and get the dish onto the boat's DC system rather than an inverter. See the sailing connectivity guide.

What we haven't tested — and what to re-check

This is researched from official specifications, not a bench test of our own. Starlink publishes no peak figure and none for Performance (Gen 3), so we don't quote either. DC accessory availability is market-dependent — confirm in your country's Starlink Shop. We don't publish prices, capacities or runtime claims: they drift, and the promos rotate. Starlink pays us nothing; we do earn a commission on the power-station links, and it never changes what we recommend — see our methodology.