How to store a power station battery safely for winter

You will set your portable power station up for months of storage without wrecking the battery. It suits anyone keeping a unit for emergencies or off-grid use. The key rule is simple: store it half charged, at room temperature, and never let it drain flat.

DON'T Kill Your Power Station — 7 Mistakes Most Owners Make, by The Buy Check on YouTube. 11 min 12 s.

Video length
11 min 12 s
Time to do it
20 minutes
Difficulty
Easy
Steps
7

What you need

Steps

  1. Run the unit down or charge it up until the battery sits between 40 and 60 percent. EcoFlow's own storage guidance gives this range, and it is not full.

  2. Switch the AC inverter off before you put the unit away. Leaving it on slowly drains the battery and can pull it down to nothing over a season.

  3. Pick a dry spot at normal room temperature, such as a cupboard or spare room. Skip the garage or shed, which get far colder and damper than most people expect.

  4. Check the battery level every two months. If it has dropped below about 40 percent, charge it back to the middle of the range, then unplug it.

  5. Never leave the unit deeply discharged for weeks. A flat battery left in a cupboard over winter is the failure that often is not covered by warranty.

  6. Only charge the unit when it and the room are above freezing. Charging a cold lithium battery can damage it permanently, even though using it in the cold is fine.

  7. Once a year, plug in a real load and run the unit for a while. You will find out whether it still holds capacity and whether the outlets work before you need them.

Tips and common mistakes

Do not store the unit at 100 percent and permanently plugged in, because that wears the cells fastest.

Read the storage temperature range in your own manual, since it varies between brands and models.

A cheap thermometer in the storage room tells you more than guesswork about how cold it really gets.

Using the power station in freezing weather is fine. The damage comes from charging it while it is cold.

Questions

Can I leave my power station plugged in all the time?

It is better not to. For long-term storage, unplug it at around 40 to 60 percent charge and top it up every couple of months instead.

Is it safe to use a power station below freezing?

Using it in the cold is generally fine. Charging it below freezing is the risky part, so let the unit warm up to room temperature before you plug the charger in.

How often should I check a stored power station?

Every two months is a sensible rhythm. Check the charge level, top it back into the 40 to 60 percent band, and switch the inverter off again.

This guide was drafted from the video's details and general task knowledge. It has not been checked against the full video. Check the video and relevant product instructions before following a procedure. Report a correction.

More in Home & DIY

See all