Most 230V AC appliances and lighting (but not all) can be powered using a modified sinewave inverter connected to your 12V battery.
Modified sinewave a fine for most simple applications but should not be used for appliances with delicate or sensitive electronics. Brushed motors will normally run satisfactorily from modified sinewave but can sometimes be noisy and possibly run hotter than normal. If you need to power sensitive electronic equipment, a photocopiers or laser printers (or any appliance with a thyristor), audio equipment, fluorescent lighting or (brushless) motors you should consider using a pure sinewave inverter.