A portable power station can sit unused for months between storms. If it is stored poorly, you may find a flat or weakened battery right when the power goes out. A few simple habits keep it ready.
1. Store it at the right charge level
Lithium batteries generally age faster when stored for long periods at 100% or near 0%. Many manufacturers recommend storing at a partial charge and topping up before storm season. Follow the storage charge level in your model's manual. If you want the unit fully ready at all times, some models offer a charge limit or a backup or UPS mode designed for being kept plugged in; check whether yours does.
2. Keep it in a moderate, dry place
- Store indoors, away from direct sun, heaters, and damp basements.
- Avoid hot garages, attics, and car trunks. Heat is one of the main causes of battery aging.
- Check your manual for the recommended storage temperature range.
- Leave space around the vents, and do not stack heavy items on top.
3. Top it up on a schedule
All batteries slowly lose charge in storage, and the power station's own electronics may use a little power. Check the charge level every few months and recharge as needed. Set a phone reminder so it does not get forgotten.
4. Test it before you need it
- A couple of times a year, run your actual emergency devices on it, such as the refrigerator or CPAP, for an hour or so.
- Test solar charging with your panels, so you know the cables and settings work.
- Confirm that extension cords and adapters are stored with the unit.
5. Keep firmware and accessories up to date
If your power station has an app, check for firmware updates periodically. Keep the manual, chargers, solar cables, and a heavy-duty extension cord together in one labeled bag.
A simple maintenance schedule
| When | What to do |
|---|---|
| Every 3 months | Check charge level and top up; look for damage or swelling |
| Twice a year | Run your emergency devices on it; test solar charging; check firmware |
| Before storm season | Charge fully; gather cords, adapters, and panels |
| After every outage | Recharge, then return to storage charge level |
If a battery shows swelling, leaks, unusual heat, or a burning smell, stop using it and contact the manufacturer. Do not try to open or repair a lithium battery pack.
Keep learning
Read our comparison of LiFePO4 and NMC batteries and our power outage preparedness checklist.
This guide is general information, not electrical or medical advice. Follow manufacturer instructions, and use a licensed electrician for any connection to your home's wiring.