The first freeze warnings of the season went up this week, from northern Minnesota on October 1 to upstate New York and Maine on the night of October 7 (25°F in interior Maine). The National Weather Service expects the next push this weekend: a first winter storm in Montana, 20s and 30s in the inland Northwest, sub-freezing nights in northern Minnesota early next week.
If your power station lives in the garage, one rule matters: never recharge it below 32°F (0°C). Every Jackery, EcoFlow, BLUETTI and Anker SOLIX manual draws that line.
- Using it in the cold: fine, with less capacity until it warms up.
- Storing it in the cold: fine above the brand’s floor, never near 0%.
- Charging it in the cold: the one mistake you cannot undo.
Why 32°F is the line
These units use lithium iron phosphate cells with a graphite anode. Below freezing, lithium ions move too slowly to slip into the graphite during a charge. Some deposit as metallic lithium on its surface instead, for good.
Battery University’s rule for lithium cells is blunt: “No charge permitted below freezing.” Researchers at TU München measured why: at -4°F, up to 19% of the lithium in a charge turned metallic, and only part of it came back. Plated lithium also raises the risk of an internal short.
Charging cold
Permanent damage. The BMS blocks it on every brand (BLUETTI error E086, EcoFlow and Jackery “low temperature” warnings, Anker’s alert). Do not fight the warning with another charger.
Using it cold
Temporary loss. A commercial LiFePO4 module tested at Politecnico di Torino gave about 15% less at 14°F and 35% less at -4°F. Cell datasheets guarantee at least 70% at -4°F. It all comes back at room temperature.
Storing it cold
Slow aging, not damage, inside the published range. Cold even slows self-discharge. The risk is a garage that drops below the floor, or a unit left near 0%.
What each brand’s manual says
Read this week in the U.S. manuals and product pages. Where a brand’s own documents disagree, we keep the stricter number and say so.
Jackery
- Charge: 32 to 113°F (Explorer 1000 v2, 2000 v2, 1000 Plus)*
- Use: 14 to 113°F; HomePower 3600 Plus down to -4°F
- Store: 32 to 77°F for a year
- Routine: full charge at least every 6 months (warranty condition); never leave it depleted for 3 to 6 months
EcoFlow
- Charge: 32 to 113°F (DELTA 3, 3 Plus, 3 Max, Pro 3, RIVER 3 Plus)
- Use: 14 to 113°F
- Store: 14 to 113°F, 32 to 86°F recommended
- Routine: every 3 months, full charge then down to 60%; warranty void after 6 months unused
BLUETTI
- Charge: 32 to 104°F (Elite 200 V2, 100 V2, AC180, AC200L, Elite 30 V2, Apex 300)
- Use: -4 to 104°F
- Store: Elite 200 V2 14 to 95°F beyond a month; AC200L -4 to 77°F for a year
- Routine: 40 to 60% charge, full cycle every 3 to 6 months; after a 0%, wait 6 hours at 41 to 95°F before charging
Anker SOLIX
- Charge: 32 to 104°F (C1000 Gen 2, C2000 Gen 2, F2600, F3000, F3800); C1000 Gen 2 fast-charges only above 68°F
- Use: -4 to 104°F
- Store: 32 to 104°F (not published for the F3800)
- Routine: 100% after use, check weekly, recharge under 30%, 100% every 3 months
*Jackery’s HomePower manuals list a lower charging floor (14°F for the 2000 Plus v2, -4°F for the 3600 Plus) while the 3600 Plus product FAQ still says 32°F. Until Jackery reconciles the two, 32°F is the safe number.
Three things no manual gives you
- A battery heater. None of the 21 models has one. Jackery sells an optional heated “Extreme Guard” bag for the Explorer 1000 v2 and 2000 v2, the only cold accessory from the four brands.
- One storage percentage. BLUETTI says 40 to 60%, EcoFlow 60%, Anker 100%, Jackery gives none.
- A restart number. The warnings clear “when the temperature returns to normal”, without a figure.
The winter routine
1. Charge indoors
Store it anywhere that stays above 32°F. A garage that never freezes is fine. A shed or a truck bed will not hurt the unit, but you will never be able to top it up there.
2. Bring it in the night before
A 40 to 80 lb unit needs hours to warm through. BLUETTI’s rule after a deep discharge, 6 hours at 41 to 95°F, is a good rule for any cold unit.
3. Set the level
BLUETTI and EcoFlow: 40 to 60%. Anker: 100%. Jackery: full, then recheck. Never near 0%: a depleted pack left for months can refuse to charge again, and every manual says so.
4. A 90-day reminder
Every brand asks for a check or a cycle every 3 months (6 for Jackery’s warranty). LiFePO4 self-discharge is 3% a month or less, so a quarterly top-up is enough.
Choosing a unit for a cold climate
The charging floor is the same everywhere, so pick on the use floor and the storage advice: BLUETTI, Anker and the Jackery HomePower 3600 Plus go to -4°F, Jackery Explorer and EcoFlow stop at 14°F. Live prices from each brand’s U.S. store.
Links to the brand stores are affiliate links: we may earn a commission, at no extra cost to you. It never changes which models we list.
| Model | Capacity / output | Price now | Per kWh | Lowest tracked | Link |
|---|---|---|---|---|---|
 BLUETTIElite 100 V2 | 1,024Wh · 1,800W | $499 | $487 | $489 (Oct 8) | Check deal |
 Anker SOLIXC1000 Gen 2 | 1,024Wh · 2,000W | $499.99 | $488 | $469.99 (Oct 8) | Check deal |
 EcoFlowDELTA 3 Plus | 1,024Wh · 1,800W | $719 | $702 | $669 (Oct 6) | Check deal |
 JackeryExplorer 1000 v2 | 1,070Wh · 1,500W | $559 | $522 | $499 (Oct 4) | Check deal |
Prices come from each brand's US store and refresh automatically every few hours (oldest check on this table: Oct 9, 4:01 AM ET). Sale prices can change within the hour; the price in your cart is the one that counts. Prices, not coupon codes: some stores stack extra member or sign-up discounts at checkout.
For runtime by appliance, use the power station calculator; for the whole-house picture, our home backup guide.
Quick answers
Can I charge a power station in a cold garage?
Only above 32°F (0°C). Every current Jackery, EcoFlow, BLUETTI and Anker SOLIX model blocks charging below that. Bring it indoors for a few hours first.
Can I use a power station below freezing?
Yes, down to 14°F (Jackery Explorer, EcoFlow) or -4°F (BLUETTI, Anker, Jackery HomePower 3600 Plus), with about 15% less capacity at 14°F and 35% less at -4°F until it warms up.
What charge level should a power station be stored at over winter?
BLUETTI: 40 to 60%. EcoFlow: 60%. Anker: 100%. Jackery: a full charge at least every 6 months. All four agree on one thing: never store it near 0%.
Originally published: October 8, 2026