Flexible solar panels

More or less, that controller will act like a PWM (cheaper) controller with your panel (your panel is probably around 18 Volts Vmp-std standard test conditions).

https://www.victronenergy.com/upload/documents/Datasheet-Blue-Solar-Charge-Controller-MPPT-75-10,-75-15,-100-15,-100-20_48V-EN-.pdf
Yes, the system will work, but ideally, you want Vmp to be > 20 volts (allowing Vmp to fall in hot weather/full sun) to meet the minimum Vbat+1V:

• 15 volts charging + 1 volt = Vmp-array >=16 volts.

And Hot panels (full sun, no wind, hot weather), Vmp (and Voc) can fall from Vxx-std (marketing numbers) by 80%:

• 16 volts Varray-minimum / 0.80 hot weather derating = 20 Volts Vmp-std suggested minimum array voltage (Vmp-std)

-Bill

The "optimum" array would be:

• 14.75 volts * 10 amps = 147.5 Watts into battery (STD conditions)
• 147 Watts STD / 0.77 panel+controller deratings = 184 Watt array "optimum"

You can over panel the array/controller too... The MPPT controller will safely and "normally" "clip" the output current to 10 amps in Cool, Clear conditions, around solar noon (panels pointing at sun). PWM controllers cannot modulate/clip output current reliably. 

Always refer to other controller requirements... Such as Array Isc (short circuit current) is Isc-array-input 13 amps maximium--Certainly safe with two of your 100 Watt panels in series.

If you have room for 2x 100 Watt panels--That will be a good solution for you.

Some other random comments... I am not a fan of "flexible solar panels"... I suggest that such panels are only "good" for 2-7 years (at best) before they start to fail/delaminate/etc.

Whatever panels you choose--Make sure they are well mounted so that driving and/or winds at camp don't come loose and get blown off the trailer.

"Glass panels" will last 20+ years normally... But they must be handled with care as they are, more or less, single weight tempered safety glass... Which will shatter very easily if dropped, "torqued" from poor mounting, or are hit with stones/metal tools.

Some folks will pack the panels in storage for the trip, and then place the panels "out in the sun" while camping under shade (keep RV and family cooler). If you do choose to stake the panels out XX feet from the trailer, make sure they are well supported so they don't blow away (or "walk away" with a bit of human help).

Running the panels in series raises Array Vmp working voltage--Very helpful for longer cable runs (smaller AWG wiring needed with high voltage/low array current).

When working with solar charge controllers, always make the Vbatt connections first, and then the array. And disconnect array first followed by battery connections. Solar charge controllers can be damaged if connected to the solar array and not connected to the battery bank--Or the controller will not "boot correctly" (controller needs battery bank voltage to properly boot and configure its output voltage of 12/24/48 volts battery bus).

-Bill