So using the two Q Cell 485w panels in parallel would double the amperage which exceeds 20 amps, or no, or does it not matter as long as the voltage is under 60 and total watts under 1000?
Amperage doesn't usually matter.
And the wattage is a byproduct of Volts x Amps. So as long as you give a healthy margin to your maximum voltage input you'll be fine.
(especially in cold weather)
The listed maximum amperage in a specification sheet is almost always a specification letting you know that the unit won't
"use" any more than that number, not that that is the max you can supply to it.
Voltage is "pushed" into a device.
Amperage is "pulled" into a device and it will only pull what it needs.
Picture it like running a 120 volt light bulb off of your outlet.
The bulb is only going to ever use maybe half an amp, but that outlet is supplying
(depending on the type) 15amps.
If the light bulb actually drew 15 amps it would instantly burn out.
The bulb only uses what it was designed for.
You can go right into your circuit breaker panel and touch two bare wires to a light bulb with no fuses or over current protection at all and it will no differently than plugged into a lamp.