I was curious to know how many amps my trailer was drawing, so I bought a Kill-a-Watt device, you plug it in between the shore power and trailer plug.
Then I turned on every single light, fan, power outlet (USBs for charging phones, etc) and it was under 4 amps.
I have 100w solar panels and dual 6v batteries with a 225 amp hour rating. Recently went camping in Utah, off grid, and with every day usage, including a CPAP, we lasted all week on just batteries with the solar charging them during the day. It's nice to know we can do that without worry.
The ONLY thing we ran into was the grey tank filling up quicker than the black, and there wasn't a place nearby to dump... but we made it before it was full.
The name's Jeff
2005 Fun Finder T139FK
2008 Jeep Wrangler JKU