A portable power station turns your campsite into a place where phones stay charged, lights stay on and a small fridge keeps food cold for days. Choosing one can feel technical, but it comes down to two questions: how much energy do you need, and how much power do your devices draw at once?

This guide explains the specs, walks through a simple sizing formula and shows real-world examples. Browse options in our portable power collection.

Watt-hours vs watts: the two numbers that matter

Capacity, in watt-hours (Wh), is the size of the fuel tank. A 500 Wh station can, in theory, run a 50 W device for 10 hours.

Output, in watts (W), is how much power the inverter can deliver at one time. If a coffee maker needs 900 W and your station's inverter is rated for 600 W, it will not run, no matter how much capacity is left.

Many inverters also list a surge rating, which covers brief startup spikes from motors and compressors.

A simple sizing formula

1. List each device and its power draw in watts. You can find this on the label or charger.
2. Multiply each by the hours you will use it per day.
3. Add them up to get your daily watt-hours.
4. Multiply by the number of days without recharging.
5. Add about 15 to 20 percent for conversion losses, especially when using the AC outlets.

Pro tip: devices that can run from the station's DC or USB ports, rather than its AC outlets, use energy more efficiently because they skip the inverter.

Example: a weekend car camping setup

Without the fridge, a 300 to 500 Wh station easily covers a weekend. Add the fridge and you are looking at 1,000 Wh or more, or a smaller station plus solar.

Battery chemistry: LiFePO4 vs NMC

Most current stations use one of two lithium chemistries. LiFePO4 (lithium iron phosphate) is widely rated for thousands of cycles and is known for thermal stability, which makes it a great long-term investment. NMC batteries are usually lighter and more compact for the same capacity but typically have a lower cycle rating. If you camp often, LiFePO4 is usually the better value over time.

Adding solar

A solar panel turns a power station into a sustainable setup. A 100 W panel typically produces only part of its rated output in real conditions, but on a clear day it can add a few hundred watt-hours. Angle the panel toward the sun, keep it out of shade and check that the panel's voltage and connector match the station's solar input.

Features worth having

• Pure sine wave AC output for sensitive electronics
• USB-C power delivery ports for fast-charging laptops and phones
• A regulated 12V car-style outlet for fridges
• Pass-through charging so you can charge and use it at the same time
• A clear display showing input, output and time remaining

Using power stations safely

Keep the station dry, ventilated and out of direct sun when possible. Do not exceed the inverter rating. Store it partially charged if it will sit for months, and follow the manufacturer's temperature limits for charging in cold weather. Power stations are a quiet, fume-free alternative to gas generators, which should never run near tents or enclosed spaces.

Bottom line

Add up your daily watt-hours, check that the inverter can handle your largest device and choose LiFePO4 if you camp often. Pair it with LED lanterns and efficient DC devices and a modest station will run your camp for days.