Re: Solar to run a fridge.
Welcome to the forum.
First some terminology; your refrigerator is using 650 Watt hours per day, not just Watts. That is about half normal. A caution about covering it with insulation; over time this could backfire as you may be covering the areas that radiate heat. You can check this by simply putting your hand on the surface when it's running and see if it gets warm.
You are right that the 'frige will have quite a start-up surge. It is doubtful that a 700 Watt inverter will handle it, especially an MSW type. You are also right that the 'frige will not like MSW; although it would work it will not work well.
You have three 110 Watt panels or 330 Watts total. Over the course of a day you could expect 686 Watt hours AC from them; just enough to run the refrigerator (based on good insolation and 4 hours of equivalent good sun). That's also just enough panel for a couple of 220 Amp hour 6 Volt batteries in series which would also just provide the power necessary to run the 'frige. The panels are probably about 6 Imp, so the MS 20 Amp controller should do.
It is possible for this to work, but it's a bit on the edge. When you add the power consumption of the inverter necessary to run the refrigerator you may not have enough power.
Four 175 Watt panels, OB MX60, 232 Amp hrs, OB 3524, Honda eu2000.
Ohm's Law: Amps = Volts / Ohms
Power Formula: Watts = Volts * Amps