I'm not there yet. My 5kW Enphase system provides about 60% and I'm now all electric. However today was one of those perfect pre-fall days without a cloud in the sky and both my mini-splits just running the fan, I made 100% of what I used! 24.9kWh. I'm really close to pulling the trigger on another 5kW of panels at $0.40/watt for new panels, if my son in-law comes through. I want to do an off-grid DIY for my shop and half of my shack. Let the utility supply power for my well, water heater and stove/range so I can use a budget inverter for everything else and let my net metering recoup those utility charges. I'm torn right now as to whether I should wait just a little bit to buy batteries because American manufacturing will be ramping up and I see chemistries improving and prices going down. So that too has me procrastinating. I am the Great Procrastinator! I don't see China as a good bet.
My solar has exceeded my expectations. We originally installed a 7.5kW system clipped by a 6kW inverter and it did exactly what the math said it would do to within a 1% tolerance. That PVWatts calculator is spot on.
Since I had over-engineered my ground mounting system, I had plenty of structural reserve to add some "wings" to the end of it, so I installed another 3600 watts worth of panels and a 2nd 6kW inverter. Then transferred part of the first inverter's panels to the second so no more clipping.
We went from generating 50kWh on a good day to just short of 80kWh. Our Michigan winters went from burning 10 to 15 facecords of firewood to just 3 or 4. From the end of summer to about Christmas, we're 100% electric heat. Then we fire up the wood stove for the January deep freeze, and by the 2nd week of February, we're back to just the electric heating.
Now I'm building a barn right next to the solar system and I'm making it tall enough so that I can put another 6kW of panels on the roof. I should be able to keep the barn from freezing in the winter, and easily air condition it in the summer.
We waste electricity around here like crazy and no one cares anymore.
We just had a 4 day power outage a couple weeks ago and we switched the grid-tied system into off-grid mode. We can continue living as if nothing was wrong.
My lithium batteries come from a Chevy BOLT EV. They were brand new and I was able to get them for $80/kWh with free shipping. I haven't seen anything close to that deal since I bought them in 2019. I think its going to be a while before prices come down, maybe another two or three years at least. The more EV's sold, the more they crash.