What a Power Station Actually Is
A power station is a large lithium battery pack with built-in inverters and multiple output ports. The battery stores energy, the inverter converts DC to AC (so you can run normal wall-plug devices), and the ports let you connect USB devices, 12V accessories, and AC appliances directly.
They are not generators — they don't produce power, they store it. You recharge them from wall power, a car socket, solar panels, or another battery. Their capacity is finite, and once depleted, you need a power source to recharge them.
The practical range: 200Wh (enough for a few phone charges and a laptop) to 2000Wh+ (enough to run a full photography setup, power tools, or even a small fridge for hours). Below 200Wh, you're typically better served by a simpler lithium battery pack. Above 2000Wh, you start approaching generator territory in weight and cost.
The Specs That Actually Matter
Battery capacity (Wh) — Watt-hours measures total energy stored. A 500Wh unit can run a 50W device for 10 hours, or a 100W device for 5 hours. Raw capacity is not directly comparable across products because battery chemistry and cell quality vary.
Output power rating (W) — The maximum continuous wattage the inverter can produce. A unit rated at 500W can't run a 600W device, no matter how large its battery. Some devices have surge startup requirements well above their continuous draw — check if the unit handles surge watts separately.
Cycle life — How many charge/discharge cycles the battery can handle before capacity degrades significantly. Lithium iron phosphate (LiFePO4) chemistry typically delivers 2000–3000 cycles at 80% capacity. Lithium NMC (nickel manganese cobalt) cells typically deliver 500–800 cycles. LiFePO4 chemistry pays for itself through longevity for frequent users.
Charge speed (W input) — How fast you can refill the battery. Some units accept 100W input, others 600W+. AC charging speed is listed as a watt value. If you're frequently depleting and recharging, faster charge speed matters.
Port Types and Quantities
AC outlets — Standard 110V/120V outlets, same as wall power. Number varies from 1 to 4 depending on unit. Check the total continuous wattage limit — some units share a 600W inverter across two outlets.
USB-A ports — Standard 5V charging for phones, cameras, battery packs. 12W per port is standard.
USB-C Power Delivery (PD) — The most useful port for modern electronics. PD outputs at 45W, 60W, or 100W depending on the port. A 100W USB-C PD port can charge a MacBook Pro directly without the AC inverter — more efficient since it skips DC-to-AC conversion.
12V car/ DC output — A cigarette lighter style socket. Useful for car accessories, LED lights, and 12V cameras. Typically limited to 10A continuous.
Solar input (MPPT) — A dedicated Anderson or XT60 connector for solar panel input. Max solar input is listed in watts. Pairing with appropriately sized solar panels matters for actual recharge speed.
Battery Chemistry: LiFePO4 vs. NMC
LiFePO4 (Lithium Iron Phosphate) — Most stable chemistry, non-combustible, handles high temperatures well. Cycle life of 2000–3000+ cycles. Found in Goal Zero, EcoFlow Delta Pro, and most higher-quality units in the 1000Wh+ range.
NMC (Nickel Manganese Cobalt) — Higher energy density (lighter weight). Lower cycle life (500–800 cycles to 80% capacity). More prone to thermal runaway if damaged. Common in lighter-weight units marketed for travel.
If you're using the unit frequently (daily or weekly), LiFePO4 chemistry pays for itself through longevity. If you need the absolute lightest unit for occasional air travel, NMC may make sense.
Inverter Type: Pure Sine Wave vs. Modified Sine Wave
Pure sine wave inverters produce AC power matching wall socket output. Modified sine wave inverters produce a rougher waveform that works for many devices but causes issues with sensitive electronics, motors, and some chargers. Virtually all quality power stations use pure sine wave inverters. If a unit doesn't specify, assume modified sine wave and avoid it.
What to Buy by Use Case
Photography and videography on location
You need enough capacity to run camera bodies, lights, monitors, and laptops for a full day. The sweet spot is 500–1000Wh with 100W USB-C PD and at least 2 AC outlets. EcoFlow River series, Goal Zero Yeti 200X, or Jackery Explorer 500 are typical options.
Power tools and job site work
Running circular saws, angle grinders, or demolition equipment requires high surge wattages (2–3x continuous draw). You need a unit rated at 1500W+ continuous with strong surge handling. EcoFlow Delta Pro (3500W surge), Jackery Explorer 1500, or Bluetti AC200P are appropriate.
Overlanding and vehicle-based travel
Look for units that can charge from the Anderson port while driving, have a durable build, and fit in a standard cargo space. A 1000–2000Wh LiFePO4 unit with 400W+ solar input covers most overlanding scenarios.
Emergency home backup
For keeping a fridge, router, lights, and phone chargers running during a power outage, look at 1500–2000Wh+ units with wheel kits and high solar input for extended outages. The EcoFlow Delta Pro or Goal Zero Yeti 6000X with integrated wheel kit are purpose-built for this use case.
The Bottom Line
The power station market is full of inflated Wh claims and marketing-optimized specs. Look for cycle life ratings, real inverter wattage (not "peak" surge numbers), and weight for the capacity you're buying. For photographers and makers who use their unit regularly, LiFePO4 chemistry pays back through longevity. Calculate whether the unit can actually run your intended device for the duration you need.
Skip units without pure sine wave inverters. Skip units that don't specify cycle life. And remember: a 500Wh unit running a 200W device gives you about 2.5 hours, which may not be enough for a full shoot day.