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What Size Portable Power Station Do I Need for Camping?

Many weekend campers start by comparing stations in the 300Wh–1,000Wh range, but a capacity label cannot choose the unit for you. The right size depends on what runs continuously, what only needs a short top-up, how many days you are away, and whether you can recharge from a vehicle, outlet, or compatible solar array.

Count watt-hours, not just watts

Multiply each device’s running watts by hours of use, then add a reserve for inverter losses and uncertainty. For example, a 65W laptop used for four hours is a planning estimate of 260Wh before conversion losses. A cooler cycles rather than drawing its rated wattage continuously, so measured use or the manufacturer’s energy guidance is better than guessing from the label. Also check startup surge: a battery may have enough Wh but an inverter may still trip.

Typical starting points

• 300–600Wh: phones, lights, cameras, and a laptop for a short trip.
• 600–1,200Wh: a laptop, lights, cooler, CPAP, and several device charges for a weekend.
• 1,200Wh+: fridge duty, induction cooking, multiple people, or several days without a recharge.

These are planning bands, not performance guarantees. Compare continuous AC output, surge rating, USB-C and 12V limits, weight, noise, and recharge time alongside capacity. For CPAP or other health equipment, follow the device manufacturer’s guidance and test the exact setup before travel.

Enter each device in the power station sizing calculator, keep a written load budget, and verify that the inverter can handle startup surges. Ready.gov’s emergency kit guidance also recommends planning backup batteries and charging options rather than relying on one untested device.