The LCOE "represents the average revenue per unit of electricity generated that would be required to recover the costs of building and operating a generating plant during an assumed financial life and duty cycle", and is calculated as the ratio between all the discounted costs over the lifetime of an electricity generating plant divided by a discounted sum of the actual energy amounts delivered. Inputs to LCOE are chosen by the estimator. They can include the cost of capital, decommissioning, fuel costs, fixed and variable operations and maintenance costs, financing costs, and an assumed utilization rate

I think solar should be a major part of any future energy generation regime, but I've also never seen an LCOE for solar that I actually believe. They also ignore the timing mismatch between generation and consumption (batteries help there, but even then, it's still a challenge to maintain an on-demand grid with solar).