Available Energy (AvEn)

Available energy is the amount of energy a BESS (Battery Energy Storage System) can actually charge or discharge under a given operating scenario, accounting for the real state of all system components. It differs from rated or installed capacity, which reflects the theoretical maximum capacity, and from state of charge, which is a BMS (Battery Management System) estimate that does not account for imbalances, usage scenarios or component limitations.

State of charge is a system-level percentage reported by the BMS (Battery Management System). Available energy is an absolute quantity, in MWh, calculated independently from the bottom up, rack by rack, accounting for subunit imbalances, offline racks, and chemistry-specific OCV (Open Circuit Voltage) curve characteristics.

Non-delivery penalties can cost four times more than the revenue from successful delivery. vdx AvEn provides a high-frequency, physics-based signal that accurately reflects true dispatchable capacity, enabling confident bidding and avoiding penalties.

The opposite case is underpromising: not promising what you are capable of because you are not aware of your own deliverable potential.

Rack-level imbalances, SoC (State of Charge) drift, offline racks, and BMS estimation errors, particularly in LFP (Lithium Iron Phosphate) systems where the flat OCV curve provides limited signal in the mid-SoC range. In large multi-rack systems, these effects compound and are invisible at system level without independent diagnostics.

LFP's flat discharge curve provides very little voltage signal for the BMS in the mid-SoC range, making estimates less reliable for precise dispatch. Stranded capacity and SoC drift are predominantly LFP phenomena, as confirmed by volytica's field data across multiple utility-scale portfolios.

Yes. vdx AvEn is designed for all major battery chemistries, including LFP and NMC. The available energy gap is most significant in LFP systems. For NMC (Nickel, Manganese, and Cobalt) and other chemistries, the same independent assessment applies, with typically smaller but still operationally relevant deltas.

It applies physics-based models to voltage, current, and temperature data from your data sources, reassesses SoC (State of Charge) independently of the BMS (Battery Management System), maps rack-level imbalances, and calculates available chargeable and dischargeable energy at configurable power scenarios.

No. vdx AvEn connects to your existing data infrastructure via API (Application Programming Interface), with no additional sensors, no on-site installation, and no downtime. Onboarding is fully remote and completed after a short calibration phase.

Yes. vdx AvEn provides a dedicated API endpoint for integration into EMS, SCADA, APM systems and trading platforms.