I have a Titan with 3 batteries in my van and 4 (100w) panels connected in series on the roof. It did not work for me in parallel. I originally thought I would be able to connect the Titan to my van alternator using a "12v to 24v isolating stepup converter". I don't know the proper name of the unit, but I know they exist. I paid a licensed professional to do this, just to find out he kept trying to connect the Titan directly to my battery. Not good but luckily fuses blew protecting both. The owners of Point Zero Energy helped. I no longer work with that builder and plan on figuring out everything myself. The fan noise level is comparable to having a box fan on intermittently the room. Noticeable but not too bad. I have had my unit for a while now. The only quality issue I have pertains to the battery case where the spot welding is not sufficient. I can easily reattach it with adhesive or get it properly welded. I have been assured the later models have this issue corrected though. This might not be an issue for non-mobile builds. All in all, I have been so happy with the unit that I have bought 2 more batteries. I apologize if my answer is not up to par with technical jargon. I'm a learning novice. If you are planing on using it in a mobile system, I was told I just need to use a 175w inverter to attach the AC plug of my Titan to my van. Please let me know if you have further questions.
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