Starlink for vanlife — power requirements

Been running Starlink from my shepherds hut for about 18 months now and it's genuinely changed the game. The dish pulls roughly 100W when actively transmitting, but your actual average draw depends massively on usage patterns.

For context, my setup uses a Victron 48V system with 10kWh LiFePO4 and a 6kW hybrid inverter. The router sits on 24/7 standby (draws about 8W), so that's your baseline regardless. If you're streaming video or downloading large files, you're looking at sustained 80-100W. Light browsing and email? Maybe 20-30W.

The real consideration isn't just the power draw — it's the inverter efficiency. Most campervans run smaller inverters which operate poorly at low loads. If you've got a 1500W inverter pulling 100W, you're losing a chunk to inefficiency. Worth looking at a quality pure sine wave unit.

Wind and weather matter too. Starlink's less fussy about positioning than traditional satellite, but you still need decent sky access. I lose connection maybe once a month during heavy rain.

What's your current battery setup? That'll determine whether Starlink is genuinely viable for you. Someone with a basic 200Ah leisure battery and roof solar would struggle during winter, but it's absolutely doable with proper kit.

Also factor in the actual Starlink hardware costs — the standard dish kit runs £500+, and the subscription's £89/month. Not massive, but worth tallying against your vanlife budget.

What's driving your interest? Full-time working or just staying connected?

The dish itself is the killer for power budgets, yeah. I've got Starlink on my motorhome setup and found the router actually draws more than people expect — mine's pulling about 15-20W constant, so you're looking at 120W+ combined when it's properly active.

What made the difference for me was separating the circuits. Dish on its own 30A breaker, router on UPS backup. That way if your battery voltage dips during heavy loads, Starlink doesn't reset every few minutes (proper nightmare that was initially).

One thing @Gill1982 might not have mentioned — the newer Gen 3 dishes are supposedly more efficient, but I haven't upgraded yet. Also worth considering: if you're relying on this for work like I am, a small LiFePO4 battery just for the router is worth its weight. Keeps your uptime rock solid even during cloud cover when the main system's recharging.

What's your current battery capacity? That'll determine if you need oversizing your solar.

Yeah, the dish power draw catches folk out. I learned this the hard way when I first got mine installed at the cabin. Thought 100W was nowt until I realised that's continuous when it's got signal lock.

The real kicker is your power budget depends massively on your usage pattern. If you're streaming all day, you're looking at serious consumption. I've got a modest 8kWh battery setup with 4kW solar, and Starlink comfortably sits alongside it because I'm typically downloading in bursts rather than constant.

Worth considering: does your inverter handle the startup surge? Mine's a Victron 5000 and it copes fine, but a smaller system might struggle. Also check your router consumption separately—the Starlink router's not brilliant for efficiency, so some folks swap it for a lower-draw alternative.

What's your current battery capacity and solar? That'll shape whether Starlink's realistic for your setup.

The router's often overlooked but it's a proper drain — I've got mine pulling about 15W constant, which adds up when you're battery-dependent. What caught me out initially was the dish cycling through its heating elements in cold weather. In winter, that 100W baseline can spike significantly if you're getting frost or condensation.

I've found battery scheduling helps loads. The dish doesn't need power when you're not actively using it — stick it on a separate circuit with a simple timer or just power it down manually when you're sorted for the day. Saves a fair chunk of your daily budget.

Also worth factoring in your upload/download patterns. Streaming or large downloads keep that transmit cycle running longer. If you're just checking emails and light browsing, the average draw drops considerably.

What battery capacity are you working with on the motorhome?

Has anyone actually measured the combined draw during heavy usage? @VoltWill and @BodgeItAndScarper have mentioned the router being overlooked, but I'm wondering if there's a spike when the dish is transmitting and you're running demanding apps simultaneously.

I'm looking at Starlink for my narrowboat setup and trying to size a battery bank properly. Currently running a Victron 48/5000 with LiFePO4, but if Starlink's pulling 100W+ plus router overhead, that's a fair chunk of my daily budget just for connectivity.

Are you lot using any load management or just accepting it as a fixed cost? And has anyone tried the newer dish hardware — heard there might be efficiency improvements?

The router's the real killer for off-grid setups. Mine sits at about 12W idle, but spikes to 20W+ during downloads. Combined with the dish, you're looking at 120-140W peak, though average is more like 80W if you're not hammering it constantly.

Worth noting the dish cycles through different power states — it's not always at full 100W. Mine drops to around 60W during lighter usage periods.

If you're on batteries, I'd size for sustained 100W draw to be safe. A decent 5kWh system handles it fine, but add that to typical campervan loads and you'll want solar sorted. I've got a 400W Fogstar panel which keeps me topped up most days, though winter's tighter.

PoE injector also draws a few watts if that matters for your calcs.

Cheers for the data, folks. Bit concerned about the combined draw though — if the dish is 100W transmit and the router's another 15-20W, that's getting on for 120W sustained. For a van setup that's proper significant.

@MarineGaz raises a good point about idle vs active. What I'm trying to work out is whether anyone's actually measured the full system pull under realistic conditions? Heavy video call, streaming, all that.

I'm running a modest setup in the van — 200W solar, 100Ah LiFePO4 — and I'm wondering if Starlink's even viable without bumping the battery capacity. The issue is I can't just leave the dish on all day like @Gill1982 can with a stationary setup.

Has anyone tried running it on a schedule or powering it down between usage windows? Feels like that might be the key for vanlife rather than trying to keep it live constantly. Cheers for any insights on actual consumption patterns rather than specs.

Right, I've got a similar setup to what you're describing @Thommo9. The thing nobody mentions is the power factor on those Starlink supplies — they're not exactly efficient at partial loads.

I've been running mine from a 48V Victron system with a decent battery bank, and I measured the actual draw over a month: dish averages about 65W in normal use (not constant 100W), but the router's the variable. Mine idles at 10W but hammers 25W+ during heavy streaming or downloads.

Key thing is the inrush when the dish boots up — caught me out initially. You're looking at a brief spike before it settles. If you're sizing a system, I'd budget for 150W peak combined and assume 80W average across a 24-hour period for typical usage.

What's your current battery capacity? If you're off-grid properly, you need to think about how many hours you're running this daily. A 5kWh bank would comfortably handle it with solar topping up, but if you've only got a small setup, you might be replacing batteries rather than charging them

The power factor point @DY_Power raises is spot on — the Starlink dish PSU isn't a pure resistive load, so your actual VA draw will be higher than the watts suggest. Worth measuring with a proper clamp meter if you've got one.

What I've found critical is the duty cycle. That 100W figure is peak transmit, but you're rarely hammering it continuously. Real-world monitoring on mine shows the dish averages closer to 30-40W across a full day — depends entirely on usage patterns. The router's more consistent though, so @MarineGaz's observation about it being the "real killer" is fair.

The bottleneck in most shepherds hut and narrowboat setups is actually the supply side, not the load. You need a decent charge controller that can handle the inrush spike from the PSU (the initial startup surge is brutal), and a battery bank sized for the continuous 12-15W baseline when you're just idling on standby.

Battery chemistry matters here too. If you're running lithium, the BMS will handle the load fine. Lead-acid struggles with the constant trick

Mate, I've got Starlink on the boat and the real kicker is the PSU inefficiency in cold weather — thing draws nearly 120W sat idle in winter just keeping the dish warm enough to function. Combined with a Victron MultiPlus inverter doing the DC-AC conversion, you're looking at closer to 180-200W actual draw from your battery bank once you factor in all the losses. @DY_Power's spot on about power factor, but honestly the bigger headache is the dish heater kicking in unexpectedly and nuking your afternoon battery state of charge when you thought you had a quiet day planned.

The cold weather point @LochLover raises is the real gotcha — I've seen my narrowboat's Starlink PSU efficiency tank by about 15% below freezing, which catches most folk off guard.

What actually matters for sizing your battery bank is peak inrush current, not the average draw. That initial boot sequence pulls north of 200A for a split second, so you need decent cable gauge and a battery with proper CCA rating. A modest Victron MPPT will struggle to keep up during active transmissions if you're also running other essentials.

My rule of thumb: assume 150W average once it's settled, but size for 250W peaks. If you're on a caravan, a decent solar array (2-3kW) is basically non-negotiable unless you fancy running a generator constantly.

The real wildcard is upload speeds — streaming video absolutely murders the power budget compared to light browsing.

The PSU efficiency angle is worth digging into properly. I've got Starlink feeding my garden office setup and I measured actual wall draw with a Victron Energy Monitor rather than relying on Starlink's published figures — makes a difference.

@LochLover's cold weather observation is spot on. What's happening is the PSU's transformer efficiency degrades below about 5°C, partly because the switching frequency compensation gets wonky and partly parasitic losses increase. I'm seeing closer to 130W input on frosty mornings to achieve that 100W output at the dish.

The practical implication for vanlife: if you're running Starlink 24/7 in winter, budget for 150W continuous rather than the 100W figure you'll see advertised. That's roughly 3.6kWh daily at 24-hour operation, which scales quickly against a modest battery bank.

For motorhome installs, I'd recommend oversizing your PSU by at least 30% and if you've got the space, consider a separate UPS-style DC-DC converter between your leisure battery and the Starlink PSU.

Running Starlink off-grid is doable but needs proper planning. The PSU efficiency losses @LochLover and @RetiredChef mention are spot-on — I've clocked similar figures in my van conversion setup.

What I'd add: the actual power profile is lumpy. You're not pulling a steady 100W. The dish cycles through active transmission, idle states, and brief high-draw moments when syncing. Over a 24-hour period, I'm averaging around 60-70W accounting for that duty cycle, but your peak load during active use can spike higher.

For vanlife specifically, I'd budget for a decent 3000-4000W inverter minimum if you're running it alongside other essentials. Pure sine wave is non-negotiable here — Victron or Fogstar units handle it well, though they'll cost you.

Battery-wise, if Starlink's your primary connectivity, you're looking at needing enough capacity to sustain it through overcast days or extended downtime on your solar array. In winter that's brutal.

The real win is combining it with good solar orientation and a decent BMS setup

Ran Starlink off a 200W solar setup in my van last winter — absolute nightmare until I swapped the stock PSU for a Victron Orion and suddenly the maths stopped making me cry.

The dish itself isn't the villain, it's that PSU bleeding efficiency in cold weather like it's personally offended by temperatures below 5°C. @RetiredChef and @SmartSolar_Geek aren't wrong about the losses, but nobody mentions you'll also want a decent-sized battery buffer because the dish does these random power spike things that'll trip your system if you're running tight on capacity.

Real talk: budget 150-200W average, factor in 40% PSU losses in winter, and size accordingly. Pair it with a quality MPPT controller and you'll stop hating yourself. Works brilliantly once it's dialled in properly.

The PSU swap is genuinely the move here. I've got Starlink running to my cabin setup and the stock power brick is a right energy hog — loses a fair bit to heat. Switched to a Victron Orion-Tr 48/24-16 feeding the dish and the difference is noticeable on my battery state of charge over a day's heavy use.

Worth noting though: the actual draw varies loads depending on weather and signal hunting. I've seen mine spike to 150W+ during poor conditions when it's constantly repositioning. If you're sizing a system, don't just budget for the 100W figure — build in headroom.

Also consider your router separately if possible. Most people lump everything together and don't realise the combined draw of dish + router + modem can easily hit 150-170W sustained. I run mine through independent circuits now.

What's your current setup looking like? Solar array size and battery capacity would help work out if you're actually overstretched or just running an inefficient chain.