Most of the potential problems in doing this, as highlighted on this
thread, are to do with needing 240VAC.

If you can get by with 12vdc you reduce the cost & complexity
manifold. Genset / Photovoltaics would recharge your battery bank.

Think about it - LCD televisions that use an external 'brick' PSU are
often 12vdc, as are a lot of consumer appliances. Lighting would be a
doddle with LEDs.

What will catch you out are fridge/freezers, washing machines & the
like.