From what I ve read you are best to go with similar panels. I believe how it works is the voltages can be different its the amps which need to be the same. otherwise the amperage from the lowest panel will be a bottle neck the larger panels. Meaning the larger amp panels will operate at the lowest amp panel.
if you had 5 panels at 10 amps and you have 1 panel at 4 amps. all of the 5 panels at 10 amps would operate at the 4 amp panels rating.
really I would try to find another use for those 2 -100 watt panels. I just bought 6 - 360watt panels
What I think you mean is a 1000watt 40 amp charge controller?
I think you will want more solar if you plan to use a microwave/freezer. I would advise doing an energy audit https://diysolarforum.com/resources/system-energy-audit-and-sizing-spread-sheet.12/
What inverter are you wanting to use?