Going from memory, but I did the math for an off-grid house at 34 degrees latitude some time back, with a winter daily energy consumption of 18kWh and summer around 28-30. With 40kWh of battery, I would need 15kW of PV on a 2-axis tracker plus a 2kW generator that would need to run about 40 hours per year. To get the generator down to 8 hours per year, I needed to double the battery. This left me "burning" half my annual energy production, as there was no need for all the summer production.
In essence, this is the challenge for solar. Half the energy you produce, if deployed everywhere, is useless, and storage has diminishing returns. My system would have a cost of ~$75,000, but would only offset $36k of utility bills. A net-metered solution would only cost $18k to offset the energy use.
Who wants to pay 2-3x for their electricity?
Now some caveats: the idea for the home was not to be off-grid, on-propane, so all cooking and heating were electric, which is inherently a non-economical decision. The home also had higher than optimal energy consumption for an off-grid design; a few less essential functions would need to be shut off, temperature reduced in the winter, cooking focused on noon time, etc, to make it really work. But, it is a fair comparison for grid economics.