Need some help calculating potential series or parallel circuits.

[Combat squirrel]

Hey all.

I have a small camper van with an All Powers S2000 Pro power station - it has an XT60 input for charging from multiple sources (solar or van cigarette plug)

It's spec for this input can be 18-70 volts at 18 amp max

I Have the 2 following power sources that feed power at variable rates:

Van - 12.9v - 10 amps

Solar - 22V - 8.61 amps (180 watt panel)

I'm wondering, would it be possible to wire these 2 inputs in a series or parallel plug to feed more power into the power station.

Both power sources fluctuate - when the van is accelerating it reduces power from its 12.9v cigarette port & puts out more power again under free wheeling (up to 14.7v) (I've monitored this on the all powers app while driving), solar obviously various constantly.

I'm thinking series would be the best way to wire this, given the power station has a large variable voltage tolerance ? Am I wrong? Will this idea fail ?.............how will the circuit behave with 2 different fluctuating voltages and slightly different amperage ?

I'm only thinking it may work as the power station can apparently tolerate a wide range of power - however I'm not sure if it knows its attached to a generic solar panel or not (and thus I'm not sure if its using solar tracking) or if it just takes and processes whatever volts or power happens to be going into it.

 

[Combat squirrel]

Just tried to calculate / work this out:

If in series it will be approx 35 volts - at whatever the lowest Amps are detected at that time?

35v, 8.6 amps, approx 300 watts of input power with a slight 5% loss in efficiency (because the circuit will drop to the lowers mixed amp?).

I sort of think the power station doesn't know a solar panel is attached it just picks up whatever is fed in - is this right ?

 

[Combat squirrel]

Now im concerned that maybe the solars 22v may 'leak' back down the 12v wires from the cigarette plug - which isn't good, would it do that?