The best UPS for Starlink — stop brownout reboots
Starlink has one glaring weakness: it hates when input power bounces, flickers, or browns out. When it does, you get reboots, failed boots, and dropouts. The fix is simple — UPS, UPS, UPS. Here's which one, and how big.
Why power bounces wreck Starlink
Starlink's power supply doesn't ride through dirty grid power gracefully. A momentary brownout, flicker, or sag — the kind that barely dims your lights — is enough to make the dish drop, reboot, or fail to boot entirely. Then you wait a minute or two while it re-acquires satellites. On a weak or rural grid that can happen several times a day, and it looks like "Starlink is unreliable" when the real culprit is the power feeding it.
The fix is the same one WISPs and data centers use for anything that must stay up: put it on a UPS (uninterruptible power supply). The UPS sits between the wall and Starlink, smooths out the bounces, and runs the dish off its internal battery the instant the grid drops — no reboot, no gap.
What to look for in a UPS for Starlink
- Type: line-interactive with AVR. This is the important one. AVR (Automatic Voltage Regulation) corrects sags and brownouts without dipping into the battery — so it fixes the exact brownout problem and saves the battery for real outages. Cheap "standby" units only switch over on a full outage and ignore brownouts.
- Pure sine wave output. Starlink's supply is a switching/PFC type; pure sine keeps it happy, where budget "simulated sine" units can buzz or run warm. Many run fine on simulated sine, but pure sine is the clean choice.
- Battery type: LiFePO₄ (lithium) or lead-acid. The battery is the part that dies in a UPS — a LiFePO₄ unit (e.g., GOLDENMATE) lasts roughly 3–4× longer than the sealed lead-acid in a typical APC/CyberPower, runs cooler, and weighs less. Stick with a known brand either way.
- Enough VA/watts for your dish plus router, with runtime to spare (below).
How big? Sizing the runtime
UPSes are rated in VA (e.g., 600VA, 1000VA, 1500VA). Bigger VA simply means it holds your Starlink online longer when the power's out. Pick the runtime you want:
| UPS size | Gen 3 (~90W) | Mini (~30W) |
|---|---|---|
| ~600VA | ~30–40 min | ~2 hr |
| ~1000VA | ~1–1.5 hr | ~4+ hr |
| ~1500VA | ~2–3 hr | ~6+ hr |
Approximate — actual runtime depends on the model's battery size and your total load. For reference, a 1000VA unit keeps a real-world Gen 3 setup online for over an hour, which covers the vast majority of outages. Want all-day backup? Step up the VA, or go DC (below).
Our picks
All three are pure sine wave. The two GOLDENMATE units run a LiFePO₄ (lithium) battery — the part that dies first in a UPS — so they last roughly 3–4× longer than the sealed lead-acid in a typical unit, run cooler, and weigh less (and it's the same chemistry we use on our off-grid builds). The APC is the proven brand-name pick with explicit AVR.
GOLDENMATE 1000VA Lithium
Pure sine, 153.6 Wh LiFePO₄, color LCD, 8 outlets. The 1000VA sweet spot — holds a Gen 3 online well over an hour, and the lithium battery outlasts lead-acid for years.
View on Amazon →APC Back-UPS Pro BR1000MS
1000VA / 600W, line-interactive, AVR, pure sine. The proven choice for brownout correction, with a user-replaceable battery.
View on Amazon →CyberPower CP1000PFCLCD
1000VA / 600W, line-interactive, AVR, PFC pure sine. 10 outlets, mini-tower, UL certified, with a clear LCD readout — a great-value brand-name pick.
View on Amazon →GOLDENMATE 600VA Lithium
Pure sine, 76.8 Wh LiFePO₄, compact and wall-mountable. Ideal for a Mini, or a shorter hold on a Gen 3 where space is tight.
View on Amazon →As an Amazon Associate we earn from qualifying purchases. Prices and deals change — check the listing for current pricing. If brownout correction is your main goal, confirm the unit lists AVR / line-interactive.
Off-grid? You're already on a "DC UPS"
If you run Starlink off a battery/solar plant, you don't need an AC UPS — the battery is your uninterruptible supply, and the dish rides straight through grid events. That's the whole idea behind our battery power guide and the RV / 12V setup. The UPS advice here is for homes and offices on grid power.
Frequently asked questions
Does Starlink need a UPS? +
If it runs on grid power, yes — it is the single best upgrade for reliability. Starlink is sensitive to power bounces, flickers and brownouts; a UPS gives it clean, steady power and rides through outages so it does not reboot every time the lights blink.
Why does Starlink reboot when the power flickers or browns out? +
The power supply does not tolerate sags and momentary dropouts well. A brief brownout or flicker makes it drop or fail to boot, and you lose connection for the minute or two it takes to re-acquire. A UPS absorbs those events so the dish never sees them.
What size UPS do I need for Starlink? +
A 1000VA unit comfortably runs a Starlink (dish + router) and holds it online for well over an hour on a full charge. Bigger VA = longer runtime, smaller VA = shorter. A Gen 3 draws ~75–100W; the Mini only ~20–40W, so it runs much longer on the same UPS.
What is the best UPS brand for Starlink? +
APC and CyberPower are the reliable, widely-available choices. Almost any UPS helps, but stick with a known brand for battery quality and support.
Line-interactive or standby UPS — which is better for brownouts? +
Line-interactive, specifically one with AVR (Automatic Voltage Regulation). AVR corrects sags and brownouts without switching to battery, so it fixes the exact problem that reboots Starlink and saves the battery for real outages. Cheap "standby" units only kick in on a full outage.
Do I need a pure sine wave UPS for Starlink? +
It is the safer choice. Starlink's power supply is a switching/PFC type, and those can buzz or misbehave on the stepped/simulated-sine output of budget UPSes. A pure sine wave unit avoids that; many people run simulated-sine fine, but pure sine is the clean answer.
How long will a 1000VA UPS keep Starlink online? +
On a Gen 3 (~90W), a quality 1000VA unit runs it roughly an hour or more; a Mini (~30W) will go several hours. Exact runtime depends on the model's battery size and your total load.
Should I put the Starlink router on the UPS too? +
Yes — put the dish, the router, and any mesh nodes on the UPS. Keeping the dish up does no good if the router it feeds loses power at the same moment.
Will a UPS stop Starlink dropouts? +
It stops the power-related ones — reboots and drops caused by flickers, brownouts and outages. It will not help with obstruction drops (trees, overpasses) or satellite congestion, which are not power problems.
Can a UPS power the Starlink Mini? +
Yes, and because the Mini only draws ~20–40W it runs far longer on the same UPS than a Gen 3 would. For vehicle/off-grid Mini setups, DC power is usually the better route — see our RV/12V guide.
Do I need a UPS if I am off-grid on a battery? +
No — an off-grid DC battery plant already acts as a UPS (the dish rides straight through grid events). The AC UPS here is for homes and offices on grid power. See the battery power guide for the DC approach.
Does a UPS protect Starlink from surges too? +
Yes — a UPS includes surge protection, so it guards the power supply against spikes as well as sags. That is extra insurance for the one box you do not want to replace.
Is a lithium (LiFePO4) UPS better for Starlink? +
For longevity, yes. The battery is what fails in a UPS, and LiFePO₄ lasts roughly 3–4× longer than the sealed lead-acid in a typical unit, runs cooler, and weighs less — so a lithium UPS like the GOLDENMATE models is a strong modern choice. Just make sure it is pure sine wave (both GOLDENMATE picks are).
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