It appears to be about 1500 watts, just like most of the ceramic heaters on the market. That is probably the maximum one can expect given the 30 amp service common on many trailers. So, while I don't have one, I would expect its effect to be about the same as any 1500 watt heater. It would probably take the chill off the trailer but I'm guessing, depending on your trailer size, that it would be inadequate for temps in the 30's. I would also like to hear from someone who actually has this device. I'm also curious about how much one can expect. I'd rather do this than have a plug-in heater sitting around; if it works well.
By the way, thanks for bringing this alternative up. I would never have thought of it. Now I'm real curious . . . .
2012 F150 FX4 Ecoboost, 2016 Surveyor 274BHS
2003 Yamaha FJR1300, Demco Premiere Slider
1969 John Deere 1020, 1940 Ford 9N, 1948 Ford 8N
Jonsered 535, Can of WD-40, Duct Tape
Red Green coffee mugs