Can you connect more than 2 EP500 units together?

I have 2 power wall units from Tesla on order, but it is backorder indefinitely. I’m curious if it would be possible to connect more than 2 EP500 units, say 6 of them, to have a total capacity of 30.6 KWh, which would be more than the 2 power walls I have on order (13.5 KWh each, 27 KWh total). Is this possible? The website seems to indicate only a max of 2 combined