I have a two phase site (not SWER) and I am installing a single phase inverter on one of the phases. What smart meter do I use in this scenario and can I do export limiting?

If export limit needs to be done on this site across all the phases then a three phase smart meter will need to be used. If the DNSP doesn’t require export limitation on each of the individual phases then it’s better to use a three phase smart meter because it will export limit once considering the total consumption across all the phases added together.