Sail_ski -
That's a good summary of the situation. Let me make a couple minor comments.
1. Terminology. The TM does not have an inverter. It has a converter, which converts 120 VAC shore power to 12 VDC. Of course, just as you said, the owner can add an inverter to go the other way - change 12 VDC to 120 VAC shore power.
2. I'm really glad you added the note about the voltage regulator. A few years back, one of our members had a terrible time with unregulated "12-volt" LEDs. There are higher-voltage transients in the electrical system which burn out unregulated LEDs, and that gets really expensive.
3. Don't forget to consider 12VDC powered fluorescent lights, such as those from Thin Lite. Your TM has at least one of them, in the bathroom. DC fluorescents draw a little more power from the battery than LEDs, but they illuminate a much wider area. They are great for areas that need "area illumination". LEDs tend to have a spotlight effect, which is great for "reading lamp" sorts of applications, such as the lamps under the front overhead cabinets. Both LEDs and DC fluorescents are a great improvement over the old incandescent bulbs.
Bill
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