these will rapidly drain your 12V battery!
these are perhaps the best option for those with a caravan, lots of lithium battery capacity and solar or petrol generators
a 1000W 12V-240V AC inverter will weigh about 2.3kg (500W weighs 1kg, 2000W weighs ~4.7kg)
the battery will also need to have a sufficiently fast discharge rate to match the power (1200W will need at least 80A, 2400W will need at least 160A)
the AC inverter should be well ventilated to prevent over-heating
NB. a standard Anderson plus is only rated at 50A (ie. 600W) so you will generally be directly wiring the AC inverter to the battery terminals using a heavy duty cable
NB. AC inverters designed for cigarette plugs can only output ~120W max.
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