Sustaining Membership applies if your business is in the industry selling, designing and installing RE and related technologies.
Tier 1 - $508.20 + GST per year is for businesses with 3 or less full-time employees.
Tier 2 - $724.50 + GST per year is for businesses with for 4 - 15 full-time employees.
Tier 3 - $1404.90 + GST per year is for businesses with for 16 - 49 full-time employees.