@risa_c - ok lang to stay outside of Australia for over a year but this will affect, in case you are considering applying for Australian Citizenship. Here's there residential requirements:
You must:
have been living in Australia on a valid Australian visa for four years immediately before applying which must include the last 12 months as a permanent resident, and
not have been absent from Australia for more than one year in total, in the 4 year period, including no more than 90 days in the year before applying.