Size for December. In Washington (Seattle data) a Mini running 24/7 on 12 V needs about 1,674 W of flat panels in December against 225 W in July. Cut its hours to a 10-hour day and December drops to about 698 W.
Sun hours
Snow melt
- Modes: Snow Melt has Off, Automatic (recommended) and Pre-heat modes; Pre-heat may increase power consumption and Off uses no extra power. Official spec: From a Starlink specification sheet or help article
- The Mini clears up to 1 in/hr. Starlink publishes no melt wattage for it; we use its 60 W Official spec: From a Starlink specification sheet or help article. Checked Oct 5, 2026 input rating as the ceiling.
- One owner’s app reading on an older dish: 45 W Community report: A dated measurement posted by an owner, cited. Checked Oct 5, 2026.
- Six hours of melting a day in December takes the Seattle panel need to about 1,883 W.
Cold batteries
- Less capacity: Battle Born: at 32 F a 100 Ah battery delivers about 80 Ah; at 0 F about 70 Ah (recoverable when warm). Battle Born: at 0 F a 100 Ah battery delivers about 70 Ah. Another maker is more pessimistic: Renogy: at 32 F most batteries deliver about 70-80% of rated capacity; at 0 F about 45-50%. Standard: From a regulator, standards body or reference table
- No charging below freezing: REDARC: charging LiFePO4 below 0 C (32 F) must be avoided (lithium plating); best charging range 5-45 C. Renogy: LiFePO4 should not be charged below 32 F (0 C) unless self-heating; its low-temp-protection batteries cut off charging at 32 F. Battle Born batteries block charging below an internal temperature of 24 F (lithium plating risk).
- The dish itself is rated down to -22 °F; the battery is usually the weak link.
Store lithium batteries inside the heated space or an insulated box, use self-heating batteries outdoors, and never bypass a battery’s low-temperature charge protection.
Closing the gap, cheapest first
- Sleep schedule: The Starlink app's Sleep Schedule (Settings > Starlink > Sleep Schedule) can be used to save power; while asleep Starlink gives no internet, does not melt snow, and can't be managed remotely.
- Tilt panels toward the low winter sun and keep snow off them.
- Snow melt on Automatic, not Pre-heat.
- More battery to ride through cloudy days.
- A generator or shore charge for the darkest weeks.
When this is the wrong choice
- Solar-only is the wrong plan for a 24/7 dish in the far north in December; see the state table for where it stops being practical.
Questions people ask
Can Starlink run off-grid in winter on solar?
Yes, with a big enough panel and battery, and it gets much harder the further north you are. In Washington (Seattle data), a 24/7 Mini needs several times the July panel in December. Cutting hours with a sleep schedule is the cheapest fix.
How much power does snow melt use?
Starlink doesn’t publish a melt wattage for the Mini; its input is rated at 60 W, which we use as the ceiling. For the old Standard Actuated, one owner saw the app show up to 45 W with snow melt on.
Can I charge a LiFePO4 battery below freezing?
Not without protection. Makers say not to charge LiFePO4 below 32 °F (0 °C); some batteries block charging below a set temperature, and self-heating batteries warm themselves first.
Sources
- How do I adjust snow melt mode? · checked Oct 5, 2026
- How do I set up sleep schedule? · checked Oct 5, 2026
- Starlink Mini Specifications (PDF) · checked Oct 5, 2026
- How to Winterize and Store LiFePO4 Batteries (Battle Born FAQ) · checked Oct 5, 2026
- Renogy Self-Heating vs. Low-Temperature Protection Lithium Battery (Renogy blog) · published Jul 8, 2025 · checked Oct 5, 2026
- Why you should not charge a lithium battery below 0C or 32F (REDARC support) · checked Oct 5, 2026
- Starlink 12V Conversion (Lorjor Explore) · checked Oct 5, 2026