Reddit mentions of Victron SmartSolar MPPT 75/15 Solar Charge Controller 75V 15A with Bluetooth

Any decent solar charge controller should have a low voltage cutoff if you run the load through it. The super cheap PWM ones might be configurable, but spending $120 for one like this was a reasonable investment for me:
https://www.amazon.com/gp/product/B075NQQRPD/ref=ppx_yo_dt_b_search_asin_image?ie=UTF8&psc=1

There are obviously others out there that might fit your needs better, but I went with this one because you can use to view exactly what is happening with your system using an app on your phone. You can also set cutoff voltages to whatever you want.

Start with just researching and seeing what is out there. You can add panels later, a decent MPPT will get you closer to the rating of the panel that you have now, and there is a LOT of money to be saved by not buying retail.

Victron makes a number of great MPPT controllers, you don't need a huge one. Here's a decent option for you, the SmartSolar 75/15 with bluetooth.

https://www.amazon.com/Victron-SmartSolar-Charge-Controller-Bluetooth/dp/B075NQQRPD/ref=sr_1_1?ie=UTF8&qid=1524710908&sr=8-1&keywords=victron%2Bmppt&th=1

Some math to consider - and I am going to make several assumptions here, so please adjust accordingly for your situation:
Typical flooded golf cart battery, GC2 is 220 amp-hour at 6V. 2 of them in series gives you a 12V pack at 220 amp-hours, of which 110 is usable for 50% discharge. A total of 1320 watt-hours is available in that setup. Yours may be different if you are using a 12v AGM, but you can figure the ratings and fit them into this.

A 75/15 controller is able to accept up to 75 volts and outputs 15 amps of charging at the battery voltage - So that charge controller would max out with just 180 watts. Two 100 watt panels, since they won't output their actual ratings. Assuming 5 hours of usable sunlight (you should get more, but again, always be conservative) right now you are getting maybe 350 watt-hours in a day... With the Victron 75/15 and two panels, that is more like 900 watts since the controller will stay closer to its limit as the sun provides.

BUT here's the thing about battery charging. The first 80% of charge takes only 20% of the time. The remaining 20% of the charge takes 80% of the time - so your charge controller can't just keep dumping power into the batteries at full throttle all day. It has to taper off, which means lost power if that solar isn't also connected to the RV at the same time so that the fridge can siphon some of those incoming watts.

So the 75/15 may be OK for your needs, I think based on your usage the 75/15 would probably do you just great, and allow some slush capacity for cloudy days - they will still produce, but not as well.

Now, the panels:
https://www.amazon.com/Renogy-Monocrystalline-Solar-Panel-Design/dp/B078J42WL7/ref=sr_1_3?ie=UTF8&qid=1524712012&sr=8-3&keywords=renogy+100+watt+solar+panel
Here's a 100 watt panel, two of these in series gets you about 6.25 amps at 40 volts open circuit (that is the max rating you need to match with a controller) so that will work great with the 75/15. $125 each.

So 2 panels at $125 and one controller (buy that first) at $118... And you are basically done! For FAR less than Canadian Tire (or anywhere else) would charge for one of those "ready to use" kits. They prey on people that don't do what you are doing, asking the questions and doing the research.

They make 12v tvs with built in dvd players. They're a bit cheaply made but they cost less than the inverter.

https://www.ebay.com/itm/Naxa-19-LED-TV-DVD-Media-Player-12V-AC-DC-w-Car-Package-Car-Truck-Camper/182500581988/

These are nice and charge fast. https://www.amazon.com/gp/product/B01BV1MTAA

And should work fine for your Switch. If the price is a bit much, there are these, which will charge slower:

https://www.amazon.com/gp/product/B0082CXEI8

There are these: https://www.amazon.com/Blue-Sea-Systems-Volt-Socket/dp/B004XIWF12

Which will allow you to plug in a 12v fan.

https://www.walmart.com/ip/Zone-Tech-12V-Oscillating-Fan-Includes-clamp-and-Screws-for-Easy-Attachment-to-either-the-Console-or-Dash/188629593

If it were me I'd replace all your bulbs with LED bulbs, I get mine here: https://www.superbrightleds.com/

That'll greatly reduce your current draw.

I have this solar panel: https://www.amazon.com/Renogy-Monocrystalline-Solar-Compact-Design/dp/B07GF5JY35 and this solar controller: https://www.amazon.com/gp/product/B075NQQRPD

For a small system that solar controller can handle both the charging and monitoring the battery. It's also got bluetooth so you can monitor it over time, if you're a big nerd like I am.

I just designed and built the electrical system in my boat so this is all fresh in my mind.

Anything you add, be sure it's properly fused to protect the wire running to the device and that you're using the right size wire. This is the best place I've found to get wire and supplies for that: http://www.genuinedealz.com/

Hope all that helps.