A portable power station is a battery, an inverter and a set of sockets in a carry handle. Nothing is wired in, nothing needs an electrician, and the unit can move between a desk, a caravan and a load of camping gear in the same week. That flexibility is the entire point, and it also explains the limits: everything has to fit inside a box you can lift.

Two specifications describe any unit, and confusing them is the most expensive mistake buyers make. Watt-hours describe how much energy is stored. Watts describe how fast that energy can leave through the AC inverter, and that ceiling is fixed. A unit holding a few hundred watt-hours behind a 300W pure sine inverter will keep a laptop, a monitor, a router and the fibre terminal going comfortably for hours, while a desktop with a discrete graphics card can exceed that ceiling on its own and simply trip the output.

Match the unit to the job before comparing capacities. Keeping a home office online through an unannounced interruption, running a laptop-based setup off-grid, or powering a camera kit and lighting on location are three different loads with three different answers. Scheduled national power cuts have ended, but municipal maintenance, cable faults and storm damage still take suburbs off supply with no warning, and a unit that sits charged in a cupboard covers exactly that. Evetech ships these from Centurion, reaching major centres in one to three business days and regional addresses in three to five.