Electricity Price Calculator

Portfolio managers at asset management firms use Electricity Price Calc to project expected returns across different asset allocations, stress-test portfolios against historical market scenarios, and communicate performance expectations to institutional clients and pension fund trustees.

Individual investors and retirement planners apply Electricity Price Calc to determine whether their current savings rate and investment returns will produce sufficient wealth to fund 25 to 30 years of retirement spending, accounting for inflation and required minimum distributions.

Venture capital and private equity firms use Electricity Price Calc to calculate internal rates of return on fund investments, model exit scenarios for portfolio companies, and benchmark performance against industry standards like the Cambridge Associates index.

Financial advisors use Electricity Price Calc during client reviews to illustrate the compounding benefit of starting early, the impact of fee drag on long-term wealth accumulation, and the trade-off between risk and expected return in diversified portfolios.

Why do electricity prices vary so much by hour, day, and season?

Electricity cannot be economically stored at grid scale (yet), so supply and demand must balance every second. Demand follows predictable patterns: low at night and early morning, peaks in late afternoon/evening, highest in summer (air conditioning) and winter (heating), lower on weekends. Supply also varies: solar generation is zero at night and peaks at noon; wind is intermittent; hydro depends on rainfall. The intersection of these dynamic supply and demand curves creates enormous price volatility — from negative prices during renewable oversupply to $9,000/MWh during Texas' winter emergency.

What is the duck curve and why does it matter?

The duck curve, named for its shape, describes the daily net electricity demand pattern in regions with high solar penetration. Solar generation suppresses midday net demand (creating the 'belly' of the duck), while the evening ramp — when solar drops off but demand stays high — creates a steep 'neck' requiring rapid deployment of flexible generation. The steeper the duck curve, the harder grid management becomes and the lower solar prices are at midday. California's CAISO was first to identify this pattern in 2013; it now affects most regions with 10%+ solar penetration.

How does battery storage affect electricity pricing?

Grid-scale battery storage (primarily lithium-ion, with flow batteries emerging) arbitrages price differences between charging hours (cheap/negative prices) and discharging hours (peak prices). As battery costs have fallen from $1,200/kWh in 2010 to under $150/kWh in 2024 (BloombergNEF data), storage has become economically viable in many markets. Storage compresses peak prices (by providing supply during high demand) and increases negative price periods (by raising demand during oversupply). The California grid, with over 5 GW of utility-scale storage, has shown batteries can defer grid emergencies.

What is locational marginal pricing and why does it matter?

Locational Marginal Pricing (LMP), used in US organized wholesale markets (PJM, MISO, CAISO, ERCOT, NYISO, ISO-NE), determines electricity prices at each specific node on the transmission grid. LMPs reflect three components: energy (the system-wide cost of generation), congestion (when transmission lines are full, moving power from low-price areas to high-price areas is impossible, creating price differences), and losses (energy lost in transmission). Nodal pricing provides precise economic signals for siting generation and storage optimally on the grid.

How are retail electricity prices related to wholesale prices?

Retail electricity prices include wholesale energy costs plus transmission and distribution infrastructure costs, capacity charges, ancillary service charges, renewable energy mandates, and utility profit margins. In most states and countries, retail prices are regulated and respond to wholesale costs only gradually and indirectly. Texas (ERCOT) is exceptional in having competitive retail markets where consumers can directly contract with generators. During the February 2021 Texas storm, retail customers on variable-rate contracts received bills of thousands of dollars per household as wholesale prices hit $9,000/MWh.

What is levelized cost of energy and what are its limitations?

LCOE measures the average cost per MWh over a power plant's lifetime, accounting for all capital and operating costs. It is useful for comparing technologies on a cost basis but has significant limitations: it ignores the time value of when electricity is produced (solar generates at midday when prices may be low; gas plants run during peak demand when prices are high), it ignores integration costs (backup capacity, grid upgrades needed for intermittent renewables), and it cannot capture option value (the ability to dispatch on demand). Value-adjusted LCOE and system cost approaches are increasingly used to overcome these limitations.

How is the power sector contributing to decarbonization?

The electricity sector is decarbonizing faster than any other sector of the economy. Solar and wind are now the cheapest electricity sources in most of the world, driving rapid displacement of fossil fuel generation. Global renewable electricity capacity additions reached 295 GW in 2022 and 440 GW in 2023 (IEA data). The US power sector's CO2 emissions fell approximately 40% from their 2007 peak by 2023, primarily through coal-to-gas switching and renewable growth. The electrification of transportation, heating, and industrial processes is expected to double global electricity demand by 2050, requiring a massive acceleration of clean electricity investment.