Hello,
First post, I have purchased a 12000XP, I am a DIYr in the process of installation (so really cannot comment about the performance, but, feel, that for my needs (I plan to be 100% OFF Grid), it should do nicely. I will share a "mistake" I made, when purchasing. The way the "system was presented", I "got the impression" the 12000XP with a single EG4-280 Ah (indoor Lithium battery) would get me "started", but, after it was not until I received the system (over a month later), did I learn, that the EG412000XP requires a minimum of 400Au to "fully function", so that was another $3500. (after shipping), that I was NOT expecting.