I bought a 100 watt Renogy branded panel off ebay a few months ago for use with a remote wifi gate camera, while it seems to work, I am not impressed by the construction, and would not mount one to something that needs to go down the road at 65+ mph. The frame was built from U channel only on 2 sides with the ends being L channel. By contrast I bought a 100 watt New-Powa branded panels a few months earlier for a different project which seemed much more robust in its construction using U channel all the way around, and the framing seemed thicker overall although I did not measure it, so that may be my imagination and only cost about $10 more than the Renogy. On a downside the Newpowa panel did have a blemish on the backing which I hope is only cosmetic.

p.s. as to the use of a microwave oven, as mentioned above I was mostly talking about using a microwave oven for things that have short cooking times say 1-3 minutes. Lets assume a typical small microwave oven which will draw roughly 1,000 watts running, lets assume the batteries are Trojan T105 golf cart batteries rated at 115 minutes of run time at 75 amp rate. (75 amps at 12V is roughly 900 watts), lets do a little rough rounding and keeping to the generally accepted rule of 50% max discharge on a deep cycle battery to maintain optimal life and we get roughly 50 minutes of run time for a small microwave oven on a fully charged pair of T105's, that is a lot of microwavable oatmeal for those early mornings when you don't want to disturb the tranquility by running your generator. As to the solar panel side of the equation, assuming your microwavable food of choice takes 3 minutes to cook, that is roughly 50 watt hours drained from the batteries, now taking into account charge losses, less than optimal tilt on panels, etc. worst case is you are using less than 1 hour of your available peak sunlight on a typical day with a 160 watt solar panel to recharge the battery from what your warm breakfast consumed from the batteries. Having said this, all these numbers look better with more solar panels.

Also in case you are wondering I have a 2,000 watt pure sine wave inverter and 400 watts of solar panels