Pure Sine Wave Inverter

An inverter turns your 12V leisure battery into a UK 230V mains socket. 'Pure sine wave' means the output waveform matches grid electricity, rather than the blocky 'modified sine wave' of cheaper units. Pure sine matters for laptops, chargers, induction hobs, CPAP machines and anything with a motor or precise timing — modified sine can hum, run hot, or refuse to work.

You size an inverter by its continuous wattage (the steady load it can run) and its surge rating (a brief spike, e.g. a fridge compressor starting). Run the numbers on the loads you actually use at once. Many all-in-one power stations include a pure sine inverter already, which is why a single unit can replace a separate inverter, battery and charger in a simpler build.