TT with Solar Panel System already factory installed ?

I ordered my TrailManor with the solar controller and wires installed, but no solar panel. I ordered the 100w panel from WindyNation. Usually recharged daily, but got into a week of rain and overcast. Never ran too low, but didn't fully-charge our 220Ah batteries. So, I installed a second 100w panel. Now, now problem getting batteries back to full daily.

Cheaper to get the panels yourself (and wires and controller, if what the factory offers is not good, or they won't wire-with-no-panels), and easy to install, at least on my TrailManor (hard roof, used 3m VHB tape, and drilled no holes in the roof).

Totally agree. Solar is one of the simpler mods. It wouldn't be on my short list of determining factors. If the trailer you want has a solar option, great! If not, it's just too easy to add versus getting a trailer that doesn't call to you as strongly.

The typical way RVs are constructed I would not expect much value from an oem solar install.

Solar panel dealers can easily install on any trailer. Yes, will have to drill a hole in the roof, but we have had no problems on last two trailers and really nice to keep batteries fully charged all the time, and they last longer if not discharged frequently. I had dealer install our Bluesky controller on side of front closet closest to front batteries for less voltage loss. Use 10 gauge wire if possible from panel to controller and same from controller to batteries. 8 gauge even better between controller and batteries. We have two solar panels at 80 watts each and two 6v. trojan batteries and when boondocking at the Quartzsite rv show (AZ) the batteries are fully charged by 11am in the AZ sun!

Nash, Arctic Fox and some of the other Northwood units have a small 20 watt battery maintainer solar panel on top of the A/C.
You can order more solar as a factory option.

For a rig the size you are looking for, check out the Arctic Fox line-up

Came stock with mine, but only 20 watt mounted to top of A/C. Just good to keep batteries charged when not in use.

We bough our Lance this year. The 160w solar option was somewhere between $400-500, can't recall the exact number but I'm leaning towards 400 range, maybe 450. Price wise, this this is pretty much the cost of parts if you were to do it yourself. I imagine they get a much lower cost for the parts than I would, giving them a better profit margin and still sell it for what they are.

I spent about $500 and installed my own plus got 200w instead. I called Lance for assistance in determining the depth of the roof, where they run the wiring when they factory install it, and they were nice enough to wish me luck and emailed me schematics and diagrams on how they do it at the factory.

Good luck in whichever you decide to do!

Trailmanor also offers a solar option. As a simple DIY project it's a lot cheaper then factory or dealer installed.