The 2014's optional inverter is a sine wave 1000 watt model, which feeds dedicated outlets. The old small microwave I put in my rig takes 70 amps at 12 volts when powered by the inverter. I installed a Tri Metric energy monitoring system to determine that. (about $200) Since I only use it for a couple of minutes at a time to heat things up or defrost something, it works very well for me and does not take much energy from the batteries. Lots of power (the 70 amps) but for a short time, thus little actual energy.
My toaster works the same way, but take 87 amps input to the inverter. But nice toast is worth it.
I upgraded the Paralax converter/charger unit to a Progressive Dynamics three stage one, and that keeps the batteries up full when plugged in. (about $200)
I have put two 100 watt solar panels on the roof, and they feed a Blue Sky MPPT charge controller for when I am out on the road. (Panels were $320 for the pair, controller was about $200, various pieces and parts another $75)
The next and last change will be a set of 6 volt golf cart batteries to replace the group 24 Interstate 12 volt
ones which came with the trailer, but for now they are working well. The battery box must be modified to hold the golf cart batteries as they are taller than the group 24's but that is not hard to do.
So, if you boondock and are electrically handy, $1000 will upgrade the electrical system and then another $200 for batteries and you will have a good, state of the art system. Now remember the 2014's optional inverter is 1000 watts, while the earlier ones were only 600 watts.