50W Panel to charge a 'portable power station' setup questions

[consure]

I'm wondering if this is a viable setup, and/or if it is safe in general and safe for the items I want to run. First question being is I assume (as it was $100 total, specs in list below) the inverter built into the power station is modified sine wave, will it be safe to charge a cell phone, tablet, to charge batteries, or devices like a Nintendo Switch?

Second question, I plan to find an MC4 adapter to get power into the power station (round plug with pin in center). Would that "work" and when it is not needed, can I unplug it, or is it best to keep it plugged into the power station? I plan to run MC4 cable from the solar panel, to the charge controller, then from the charge controller, to the "portable power station". The panel will be pole mounted outside on the ground. Is a charge controller needed here, or is it best practice to have?

What I have:
- 1x Renogy 50W 12V/24V Panel
- 1x 10AMP PWM Charge controller
- 1x pair of 20Ft MC4 connector adaptor kit with MC4 male and female connectors, tray cables
- 1x 46000mAh "Portable Power Station" (Similar to a Goal Zero YETI)
Outputs: DC out 9-12.6V/10A, AC outlets (100W continuous, 150W peak), USB ports
Inputs: AC adapter (round with pin in center) 15V/2A, Car Charger adapter
Advertised to charge if solar panel is under 150W

Thank you!!

[Mike90250]

NEVER hot plug or unplug MC4 connectors. They are not rated for connect/disconnect and will arc and damage the low resistance gold plating.

Either use a switch or breaker to "disconnect the power" and then change the plug, or only do it in the dark

[bcroe]

NEVER hot plug or unplug MC4 connectors. They are not rated for
connect/disconnect and will arc and damage the low resistance gold plating.

Huh, you found GOLD plating in a cheap MC4? Bruce Roe

[Mike90250]

I thought the gold plate was part of the spec to maintain low resistance. Silver is lower resistance but oxidizes rapidly.

[bcroe]

I think they are some sort of tin related plating such as used in automotive in
the past. No tolerance for exposure. Bruce Roe

[consure]

NEVER hot plug or unplug MC4 connectors. They are not rated for connect/disconnect and will arc and damage the low resistance gold plating.

Either use a switch or breaker to "disconnect the power" and then change the plug, or only do it in the dark

So I wasn't planning on connecting/disconnecting the MC4 cables but perhaps doing so with an adapter that changes the MC4 into a barrel style power connector which would go into the "portable power station/battery pack". Is it still best to get a switch or breaker, or would the PWM charge controller do that job?

[Mike90250]

If you have a PWM controller you can turn off, great, that stops the power from the panels. But most controllers don't have an OFF switch, so an external switch / breaker for the PV and Battery leads are useful for controllers