Best weatherproof MPPT solar charge controller

I am about to buy 200 watts of portable solar panels in a suitcase configuration. I was about to get a Renogy 200 watt unit that comes with a weatherproof 20 amp PWM controller, but I really want an MPPT controller so I can hook those panels up in series rather than parallel. That way I can reduce voltage drop by carrying half of the amps at twice the voltage, and putting the controller beside the batteries instead of beside the panels. Then I had a brainstorm. Instead of buying the 200 watt unit with a PWM controller that I don't need, and wires I have to cut and reconfigure to get series panels, I will buy two of their 100 watt suitcases without a controller. That will make it easy-peasy to put them in series configuration. However, I still need a weatherproof MPPT controller.

Question, can someone point me to a decent weatherproof MPPT controller, preferably negative ground? (Victron doesn't list any of theirs as weatherproof.)

Thank you in advance