Expos stream 800w

Hello all - I bought the ecoflow stream panels 800w twin panel the other day and now looking at getting their brackets - on the ecoflow website they have the flat roof brackets for £75. Does any one know if there’s enough brackets in the pack - I assume 4 but haven’t opened the panels yet - but I don’t want to under purchase and need to get more. Sadly the website doesn’t specify.