I have had 2 of these units . The first one’s WIFI module stopped working, then the screen started glitching out randomly ,the. It overheated and the battery terminal melted the battery cable . ( This was all professional installed with a Hubble battery ). …Trying to get any after sale support is a long process of getting passed back and forth . Eventually my unit was replaced under warranty but I had to pay for installer to remove it and then to re install the new unit .. Within a year the replacement “ new” unit had a glitching screen & then components on the main board fail and burn out …I’m now stuck with a non functioning unit that I’m advised to just “ buy a new one “ .. All in all save your money these inverters look nice and that’s about it … absolute waste of money and poor quality .