1. Redundancy.
Micro Inverter per panel allows for any panel/micro inverter to fail, be shaded, ect and NOT effect the rest of the production.
The issue is, they are VERY sensitive to overload, most micro inverter systems are 20% to 40% 'Over Paneled' to compensate.
2. Losses.
While full production/Full useage is quite efficient, anything you produce above & beyond usage is wasted entirely (Without Grid Tie).
You WILL need a 'Timing' source off grid, a battery powered inverter to produce the sine wave form so micro inverters can sync.
No 'Signal', no Sync, no power.
ANY glitch will take 10-30 minutes for inverters to sync.
3. You can't 'Mix & Match' micro inverters.
As far as I know, and I've been reading a lot about AC coupling, They only work with their same brand/type/model.
Several threads about replacing failed emphase (spelling?) brand with newer model and NOT working, buying 'Spares' wouldn't be a bad idea if you intend to live in the same house for 10 or 20 years.
-------------------------------------------
Every connector will eventually fail. Period.
The seal will dry out, the terminals will corrode, particularly conducting DC power.
NEC only recognizes 20 Amps through an MC4 connector, which I just ran onto myself...
A good, solid, sealed up splice will be there 20 years from now, and it's a small price to pay for 20 years of reliable service...
Particularly in harsh environments.
---------------------------------------------
Most bigger (whole house 240V) inverters support TWO STRINGS, and I just found out why from an installer with 15 years experience.
Most high powered strings are permanently mounted,
On a home, that's East *OR* West facing with peaked roofs, not flat warehouse roofs...
That means full power in the morning from the east facing string,
Leveling off around noon when sun isn't at optimum for east or west facing panels,
And full power again after noon sun for the West facing high voltage string.
Big SINGLE STRING inverters are almost exclusively used in solar fields where panels track the sun, or big, flat warehouse roofs where all panels are orientated the same way.
-----------------------------------------------
As long as AC is the king of power appliances, inverters will be needed, 'Ugly' or not.
With my remote strings, I'm simply going to plug in an AC inverter to contribute to the 'Common' 240 VAC lines and use AC power supplies/battery chargers directly off panel production.
No more of the uber costly Battery Charger combined units that don't like to charge *MY* specific kind of LFP batteries.
Power supply/battery charger set specifically for my LFPs and forget it, charger on a timer for peak sun so everything is producing when batteries charge and walk away...
Truly 'Plug & Play' with no chances of damaging my SPECIFIC LFP strings/banks, and I can add as many solar strings as needed to fully power everything with AC Coupling.
These are my retirement years, I don't want to mess with 'Managing' every detail every day, so I'm throwing some money/equipment at it for specifics with 10 or 20 year warranty stuff and going fishing!