Shenzen EFire BMS, anyone?

[Denis]

@Denis what is the relay all about? Can this be used to control a heater?

I'm new to solar and considering the Magnum MS448PAE, PT-100, ME-ARTR, ME-AGS-N. Thinking I will start with 16x280ah EVE cells and a JBD-16s 48v 200A BMS (AP203003S). It comes with relay!

I called it a relay, it is the contact Mechanical used in your BMS to provide source connection to the load.
As in the pictures.