It is a superior solution. I agree. I think it' s admirable you go through the trouble of installing them, as they are not required, but help down the line.I still think whips outside the j-box is simpler, safer, and faster.
Me.....I am cheap, lazy, and fast. Installing whips and extra (MC) plugs = extra work, :roll: I will admit!
( however, now....i may well do so tho...)
It's like all the rapid shutdown and disconnect requirements of today: they will create safer, more manageable DC systems.
(They also add more cost and labor. This cost will become less and less with tech developing.)
Additionally, we may service another installer's system, in which case we may or may not have these MC connector whips handy. Removal of the GFDI fuse can be a literal, LIFE-saver in these cases.
"not installing too many grounded inverters anymore",
yes, and thankfully so! I have seen two shocks of personnel. Both were: body between positive and rail/lay in lug/metal racking. Only because the rail was bonded (thru GFDI fuse) to negative at inverter..... did it cause a shock.
I am installing lots of optimizers with SAFE DC voltage features, and micros recently. With the availability of module-level ,smart tech that shuts it all down to 1 V per panel at the CB, or the V of an individual panel or less...i cannot stomach the thought of "undisconnectable" 600vdc systems any more.
Unless i save a ton of money!
Also i do avoid the opt.s and micros on steep/ inaccessible roofs. Once scaffolding disappears, i really don't look forward to a module level issue up there...so i keep it simple: mod.s and wire.
But this is a whole new issue and topic....