Storage as a flexibility tool for EU-facing exports
Battery energy storage systems could help renewable generators in the Western Balkans deliver more predictable electricity export profiles into the European Union. Batteries can absorb midday solar generation, reduce imbalance penalties and support more stable export schedules. Co-located with a renewable generator, a battery can respond to changes in electricity nominations faster than a generation asset operating alone — improving the commercial performance of merchant projects and power purchase agreements independently of any carbon border benefit.
The origin-tracking problem
Shifting electricity between hours, however, introduces additional requirements for tracking energy origin under the EU Carbon Border Adjustment Mechanism (CBAM). Charging a battery from a renewable installation does not, by itself, establish that electricity discharged later can qualify for actual-emissions treatment as an import.
An electricity evidence file must distinguish between direct exports from a generating installation, battery charging, electricity imported from the grid, battery discharge, internal losses and electricity delivered across the EU border. Where a battery charges partly from on-site solar and partly from the grid, the operator needs a transparent methodology for allocating the different energy sources. Whether that methodology is acceptable for CBAM claims must be assessed against the applicable rules.
A co-located 100 MW solar plant and 50 MW battery: in one hour the solar installation generates 80 MWh, sends 45 MWh directly to the market and charges the battery with 25 MWh. Two hours later the battery discharges 22 MWh — separate physical events, with the difference reflecting losses and other storage-related accounting factors.
Contracts must define metering and dispatch
PPAs should specify the location of revenue meters, whether the battery and generator are treated as one or multiple relevant installations, which party controls charging, and how stored electricity may be used by the trader. Battery dispatch decisions can affect contractual delivery profiles: operating a BESS to capture balancing-market revenue may conflict with a promised PPA schedule. Where the battery can charge from the grid, the EU importer needs to know when discharged electricity came from the grid.
Keep CBAM premiums out of the base case
Battery financial models should separate revenues from balancing services, intraday arbitrage, capacity and delivery-profile firming, where local market rules allow. Any additional premium based on CBAM qualification should be tested under a downside scenario rather than automatically included in the base valuation. Lenders must also account for battery augmentation requirements, degradation and round-trip energy losses.
Source: CBAM News
This article was assisted by AI analysis. Please refer to the original source for official information.