It's not simply a problem of storing excess power, it's generating more capacity than the lines and transformers are capable of safely handling.
Yesterday my system was able to reach peak (clipped) production at 6,000 W while my house was using 250 W. I was throwing 24x more energy into the grid than I needed myself. If a significant amount of homes do this, it's easy to see how infrastructure can become overloaded.
Yesterday I produced 25 kWh, or $2.75 in electricity. My utility bill is going to be somewhere around $12/mo from here on out. Another little perk I noticed is there are some city taxes on the net amount consumed, so with zero net use, I'll pay zero city tax.
Here's a portal to view my stats:
https://monitoringpublic.solaredge.c...2-311e68d5c4ce
