Well the power meter I bought was this one:
Turnigy 130A Watt Meter and Power Analyzer
It was around $30 with shipping. My only complaint is that it has a minimum threshold of about 1.5 watts. The problem there is my LED bulbs draw less power than that, so I had to combine measurements and switch things off to get a fair reading.
I have started making a list of things for my trailer to see how much power any given device uses. Some stuff I could not test yet as my trailer is still winterized. However in case you are curious, this is what I have so far:
Standby Mode:
Secondary 12 volt outlet- 0.6 watts
Stereo and CO detector- 2 watts (Both are on same circuit)
Usage Mode:
"1157" LED bulbs- 3.3 watts (each)
"921" LED bulbs- 1.1 watts (each)
Stereo playing USB video; volume between 2 to 4- 14 watts
Stereo playing USB video; volume at 12- 18 watts
Furnace motor- 33 watts
RCA 19” TV- 20 watts
Antenna power booster-
Water pump-
Digital power display-
Tank sensors-
I included hyperlinks to anything that is non-standard as well; just in case you are curious as to what I am using.