I’m planning to install some RGBW 4” downlights (12W, 12V) in my RV trailer and I’m trying to figure out which controller I should use.I only want to order four lights first to test the setup, but I may add more later if everything works well.Has anyone done something similar with a camper or RV setup?
For these 12V RGBW downlights, you can use a compatible RGBW PWM controller like this one:
The controller supports RGBW lighting and app control.
If you are using a separate power supply, both the controller and power supply should be rated higher than the total wattage of your lights. It’s generally recommended to leave around 20% extra capacity for more stable performance and longer lifespan.
I actually like using RGBW downlights in RVs because the warm white mode works well for normal lighting, and the RGB colors are nice at night without being too harsh.
13.1V is pretty normal for RV systems. I’ve been running several 12V LED lights directly from my camper battery setup for over a year without issues.
I’d just recommend using proper wire gauge and leaving some extra controller capacity if you plan to add more lights later.
For my application, I’d like to use the lights in my RV trailer directly from the existing 12V circuit. If I hardwire them into the RV system, I won’t need a separate power supply, correct?
In many RV setups, it is possible to hardwire 12V LED lights directly into the RV’s 12V circuit.
The main thing to confirm is whether the circuit provides stable DC12V output and what the actual voltage is while charging or when connected to shore power.
Some RV systems can run at around 13–14.6V during charging, and continuous over-voltage may shorten LED lifespan.
If your RV system provides a regulated and stable DC voltage within a safe range, then an additional power supply is usually not necessary.
I checked the RV electrical system and it stays around 13.1V pretty consistently, so it sounds like it should work fine.
I’ll probably go ahead and order the lights and controller now.