i use a PV simulator give smartsolar a 120v and 2A power.but there is no current input to the solardevice, after on/off serval times, the situation bacame no voltage but current input is ok, is my smart solar device has a internal short circuit？
my device model is smartsolar charge controller MPPT 250|85-tr VE.Can and multiplus 48/5000/70-100
Simply showing a device serves little purpose. Please provide an image of the full setup and equipment involved as well as settings. Search for the pre-rma document on this site and go through it before sending it to your dealer to check and raise an RMA if appropriate.