Titan and reaching the the Input Volts: 35V to 145VDC

For the Titan (generator)
One concern - the Input Volts is 35V to 145VDC.
In an RV it is difficult to find the space for a lot of panels.
24V panels are HUGE.
12V panels would need 3+ to reach the 35V.

--- Any concerns with using 3 (odd number) 12V panels in series to reach the input voltage?
--- Someone said Two 12V panels in series will produce more than 24V??? (Am I missing something)?

--- What are your thoughts on overcoming this conundrum of small space and higher Input Volts: (35V to 145VDC)?

yes 12V panels are actually much Higher say 16 or 17 volts especially in open circuit with no load But 2 still wont get you there.. Putting 3 in series will work fine if that is what you need to do for space requirements. You have plenty of room to play with voltage wise. even 3 at 20v volts will still be quite lower than your max.

I have used up to six 12V (18 volts actual) panels in series hooked up to my Titan thru one solar charge controller with no problems. I have also run a 5S 2P (1000 watts) array through one of the charge controllers, but my normal configuration is to run a 5S (500 watts) array thru each of the solar charge controllers. I have also used as few as four in series on a charge controller but I have not tried to run only 2S to see if it would work.

@Will Prowse has a couple of videos that I CONSTANTLY rewatch as a refresher when it comes to solar panel wiring.

Connecting mismatched panels -
12v vs 24v (Applies to higher voltages) -

Biggest takeaways that I’ve learned (in theory online ?)

- Parallel connecting: equalizes voltage lowest voltage but adds up amp delivery.
So: 12V/6A panel parallel with 24V/10A panel = 12V/16A (192W) to controller.

- Series connecting: equalizes total amps to lowest amp panel but adds up voltage delivery.
So: 12v/6A panel series with 24V/10A panel = 36V/6A (216W) to controller.

- Voltage not impacted as much for longer distance cable runs. If you have long cable runs to your battery then wire in series. You have more Amperage drop the longer the cable runs get.

- Series panel wiring = good for cable efficiency and losses. Higher voltage means less amp deliver which means thicker cable isn’t necessary.

- Series panel wiring = bad in partially shaded conditions. If one or part of the panels become shaded, you drop the power of the ENTIRE series connected array.

So to answer your question directly ?

--- Any concerns with using 3 (odd number) 12V panels in series to reach the input voltage?

3 panels all 12V but different Amperage in parallel will output 12v (or ~17V open circuit) and adds up all the different amperage.
Example: 12V/1A + 12V/10A + 12V/6A = 12V/17A.
open circuit voltage is more like ~17V so 17V * 17A = 289w to the controller.

--- Someone said Two 12V panels in series will produce more than 24V???

So since open circuit of 12V Panels are typically around 17-18V, putting two in series adds up their voltage, so 34-36V.

BUT of the two panels differ in AMPS then the array will be reduced to the smallest producing panel.
Example 12V/6A + 12V/1A panels will reduce the 6A panel to 1A. So series = 24V/1A output. Connecting in series will give you about 24 watts at 24V. Connecting those same panels in parallel will give you about 84 watts but at 12V.