LCOE only measures the average cost of generating one unit of electricity over a plant's life. It ignores the reality of a grid that relies on variable sources like wind and solar. To see the full picture for the end consumer, you must look at System LCOE. This includes the costs of backup power, long-duration energy storage (LDES), and expanded transmission lines.
Technical reliability is just as vital. You should track Loss of Load Probability (LOLP). This metric tells us how often the system might fail to meet demand. If we rely too heavily on weather-dependent assets without enough inertia or spinning reserves, the risk of blackouts increases. Such failures carry massive economic costs that LCOE completely misses.
On the economic side, watch System Integration Costs. These cover the balancing services required to keep frequency stable when clouds move over a solar farm. Additionally, consider Consumer Price Volatility. While renewable fuel is free, the rapid swings in supply can cause price spikes in wholesale markets. By monitoring these indicators together, we move past simple generation math and toward a realistic understanding of grid economics.
