Well in my case the unintended consequence was wasting money and starting experimenting with grid-tie first.
My initial thought was to save a few cents with a small DIY grid-tie system (no contract with power Co. because my system is fairly small so basically most of the output is self consumed by the house anyways).
But it turned out to be expensive.
I wish I had the knowledge and vision at the beginning, to what I am achieving currently: Partial home backup in case of a power outage.
I started experimenting with a few flexible panels and cheap grid-tie inverters. Then I upgraded to larger glass panels and found out that the cheap microinverters were trash. So I upgraded that too.
Then I wanted to have energy storage, so I got an 24v 3k AIO with around 5kwh of DIY LIFEPO4 storage.
I really lost count of how much money I spent in the last 5 years or so, experimenting, buying components, upgrading, etc...
I did learn alot (especially from this forum, Will Prowse and other YouTubers), but I think it was a high price to pay for this learning curve, building my solar vision and requirements.
My PV is setup on a fairly small pergola, now I want to upgrade that too, so that I will be able add more solar.
BTW, I totally agree with what many have stated here, about
maintenance and having other members of the house being able to handle the complexity of the system, should there be a fault.