POST 22 (Original) — Innovation Spotlight: Introducing the LCOCEOS Metric

Innovation in the renewable sector often happens faster than the vocabulary can keep up. At TWEFDA, we identified a critical gap in how the value of hybrid energy systems is calculated. Below is a comparison of the key metrics shaping our industry.

LCOE SCOE Standard Levelised Cost of Energy used to assess SCOE expands on LCOE by including all cost factors generation costs over a plant’s lifetime. relevant to society as a whole. This includes: Social effects (e.g., impact on property values) LCOE is the traditional metric for comparing the cost of Subsidies (for both renewables and conventional different energy generation technologies. It calculates sources) the average cost per megawatt-hour (MWh) of Environmental impact (including a realistic CO₂ electricity generated over the lifetime of a plant. price) LEARN MORE Employment effects Geopolitical risk impact Transmission and variability costs SCOE provides a macro-economic yardstick for the real cost/benefit ratio of energy technologies. Explore Data

LCOS LFSCOE Levelized Cost of Storage, measuring the total lifetime Levelised Fully Firm System Cost of Electricity, cost of an energy storage system divided by introduced by Robert Idel in Dave Borlace’s analysis to cumulative energy delivered. value total system stability.

LCOS measures the average cost of storing and then Introduced by Robert Idel in Dave Borlace’s video, discharging electricity, accounting for the full lifecycle LFSCOE considers the cost of delivering electricity that of storage technologies. It is crucial for evaluating the is always available (“fully firm”), factoring in the need economic viability of energy storage solutions. for backup and grid integration. Storage Insights WATCH ANALYSIS

NEW: LCOCEOS (Levelized Cost of Combined Energy Or Storage)

To speak about ESWave, TWEFDA coined a term, which is a Hybrid Functionality Energy Device (HFED). Get in touch, to leave your thoughts on this, or any other part of this email you think requires discussion.

This term was needed for the ESWave’s ability to provide complementary functions such as generation or storage on demand, which is exactly what the Grid requires at any time. The complementary functionality with one single

PTO might be a market first value proposition. See research at TWEFDA’s website

Probably the closest leading technology that implements generation and storage in one single frame comes from the Ocean Hydro Omni at Hydro Wind Energy. It’s worth pointing out that, in spite of the apparent advantage of generation AND storage in one single frame, our electricity grid requires, at any times, only one of the two functionalities, which means that generation OR storage is a much more compelling argument.

Another very close example is a moto/generator, such as those used in hybrid cars or the one used in a typical pumped-hydro application. The difference with TWEFDA’s development is that the moto/generator uses internal energy in generation mode, which means that no extra energy is generated from it.

An ESWave rises storing gravitational energy using external resources, sometimes generated by another ESWave. Nonetheless, when the ESWave comes back to the ocean, it enters the generation mode providing energy, this time, from wave reciprocation. This process can be done on a 24/7 basis reducing or eliminating the need of additional machineries and reducing or eliminating renewable’s most pressing drawback, which is intermittency.

In addition, with ESWave you validate one single PTO. This comes with one single project, with lower CAPEX and doing whatever the grid is asking it to do.

Let’s understand the problem. The grid needs to be balanced and uses machines to accomplish this task, but if we produce power (generation) or we charge our storage devices (storage) when the grid doesn’t want it, we are harming the grid. That’s why neither generation nor storage devices are, in isolation, a perfect fit.

Strategic Advantage: Generation OR Storage

While some devices attempt to do both simultaneously, combining functions can lead to inefficiencies. TWEFDA’s ESWave focuses on the power of choice.

The Generation AND Storage Model

Other machines offer simultaneous generation and storage. However, this often does not target the essential need of the National Grid, which at any time needs either generation or storage [this is linked to the need to balance consumption (storage) and supply (generation)]. In addition, you need to prove, buy and maintain two different PTOs, one for the generator, and one for the storage.

ESWave: Generation OR Storage

ESWave uses a single PTO to switch modes on demand. This dedicated focus ensures maximum efficiency for whichever task the grid requires in real-time.

In addition, it does not harm the Grid, by not providing what the Grid does not want at that precise time.

Grid Balancing: The 2026 Mandate

Referencing NESO’s pivotal 2024 report, the global shift toward intermittent renewables makes real-time grid balancing more than a convenience—it is a necessity for stability. Unlike standard generators, ESWave utilizes a single PTO to switch modes on demand. Download the Report Summary

Beyond LCOE: A Technical Deep Dive

Standard metrics are evolving to meet the complexity of the modern grid. We are closely monitoring the work of industry leaders like Robert Idel and Dave Borlace to refine our understanding of complementary functionality.

ESWave vs. other leading technologies

While technologies like the Ocean Hydro Omni offer impressive generation AND storage with 2 devices assembled in the same frame, ESWave’s distinction lies in its integration of the two complementary functionalities in one single machine, with one single PTO which provides wave-based generation or gravitational storage on demand, increasing versatility.

The Value of HFEDs

LCOE and LCOS are standards parlance. ESWave combines these two in a manner where the time is distributed on:

Generating from wave energy in generation mode Storing energy in storage mode Releasing energy stored in generation mode. Waiting for energy to be released in locked mode

This market-first dual complementary functionality may suggest the incorporation of a new metric, the LCOCEOS (Levelised Cost of Combined Energy Or Storage), don’t you think?

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