[editor-surveyor]

All of my panels just have water tight buss boxes.

[familyop]

"All of my panels just have water tight buss boxes."

Junction boxes are just fine for previous installations and are probably more durable than the MC4s (Multi-Contact 4mm square), IMO (expected aging of MC4 latches). The NEC requirement for locking/latching connectors was yet another attempt to dummy-proof installations. We continue to use combiners for installations with much charging current anyway (looks like a 10-amp MC4 cable limit with voltage drops being even more limiting and to be considered in advance of that).