As the noise level has gotten pretty high here I don't know if OP is still with us but a couple of additional thoughts might interest him. First is that I took some measurements this morning on the panel I mentioned in an earlier post. The panel is made by Jackery and rated "100W/18V". In today's bright sun (45 °N) it produces an open circuit voltage of 20.3 volts. When connected to a controller with MPP it is able to collect about 60 W and the voltage drops to 17.3V. When clouds roll in the output drops but even at the 2 watt level never goes below 17 V. Those familiar with PV cell IV curves will understand this.As I am writing this I am charging a battery pack with arrays that produce 18 V (presumably also at the PPP).
Yes, a 20' x 8.5' trailer with the roof covered in solar panels could produce as much as 340V. But it would be cool if Tesla were to allow for the battery pack to change from series to parallel so charging could be in the 26V range. I think Rivian has a patent on this though. They are suppose to allow for their pack to split into two parallel dropping the charging voltage from 950V to 450V....And if you were using a maximum power point tracking (MPPT) system instead of a pulse-width modulation or simple point conversion you'd wire additional panels in series instead of parallel and then say you have four they'd peak at 82V instead of 20V.
The reason most panels are wired to lower voltage is to make them safer to install. But if you already have high-voltage requirements, say in an electric truck that supports DC fast charging, then there's no reason not to run them as high voltage low-amperage arrays.
Have you looked at the specs of the titan? Please correct me if wrong but it should be able to charge the truck. With 2kw pv input and the 30amp rv plug. My goal would be to camp for few day at a site and gain range while still running all the gear I would need. I have a yeti and I like it but there no comparison between the two. Plus I would always leave with the 6kw battery topped off. Trust me when I say I believe I'm out of my depth. My field of study and professionalism is it security not electrical engineering. My interest is to accomplish long-term camping and not drain my battery pack. I look forward to your input, and am happy to find this thread. I've been working this nut alone for awhile.I have 500 Wh and 1000 Wh Jackery battery pack/inverters and find them quite useful for, for example, running an ARB fridge while the car is parked overnight as I don't want to run down the traction battery any more than the phantom drain already does and I'm not even sure the 12V outlets stay live after the car is turned off. They are also handier than the equivalent powered Honda camp generators in many applications.
I have also thought about the Yeti packs for short term home backup but they all suffer from the same shortcoming: no 120/120 biphase. I suppose I could kludge something with a transformer but that kind of flies in the face of the direction of the technology.