Batteries, Communications & Electronics, Computer, Electricity, Technical 
2 Comments Found an Energy Sucker
I was working at my computer without any incident for several hours since unplugging. The minute I plugged my laptop charger in, my system went hay wire! The solar control monitor reading dropped from 14 volts and change to 11.5 volts and my inverter started shrieking!
This is not good! I really need to get that battery monitor working to figure out what is going on. I also got a Kill-a-Watt metre to figure out what I’m drawing on the 120V side of things.
FYI, the maximum wattage for a 17″ Macbook Pro is 85, with average draw running 35 to 60 watts. On 12V power, that translates to a maximum of 7 to an average of 3 to 5 amps. I really can’t figure out why my system can’t handle, but maybe I’m running more than I thought I was. I’m going to go get some fuses to hopefully get that battery monitor working again.
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That is not good! Try unplugging the RV from the inverter, plug the Kill-A-Watt into the inverter and the laptop brick into the Kill-A-Watt, first without the computer attached and then with the computer attached. It sounds like you have a problem somewhere. This will help isolate it.
Then just for comparison sake, do the same measurement with the Kill-A-Watt plugged into shore power. Something will show up.