Battery Storage Operator
Locking in spreads and securing revenue certainty for energy storage
Battery storage derives its value from intraday price arbitrage, so viability hinges on the persistence of hourly price spreads. Operators are uniquely sensitive to the shape of the intraday price curve rather than its average level.
Business profile
Battery storage assets derive commercial value from intraday price arbitrage — charging when prices are low and discharging when prices are high. The viability of a storage asset hinges on the persistence of hourly price spreads. Unlike thermal generators or load-serving entities, battery operators sit at the intersection of buying and selling: they are price-takers in low-price hours and price-takers in high-price hours, making them uniquely sensitive to the shape of the intraday price curve rather than its average level.
How they manage price risk today
RTO day-ahead market
Battery operators typically clear charge and discharge cycles in the day-ahead market, which provides hourly price signals for the following day. By purchasing power in expected low-price hours and selling in expected high-price hours, operators can lock in an intended spread on a day-ahead basis. Many batteries also participate in DA ancillary markets — regulation up/down and spinning reserve — to optimise revenue across multiple products simultaneously. However, DA participation locks prices in for only the next operating day, providing no mechanism to secure forward spreads over longer horizons.
Bal-day & peak block futures
To hedge spread economics over longer periods, battery operators typically sell peak monthly futures and buy off-peak monthly futures, creating a financially settled position that replicates the spread the battery aims to capture physically. This is an important first step in revenue stabilisation. However, peak and off-peak blocks are averages across many hours: a battery with two to four hours of useful dispatch capacity per day does not capture the average 16-hour peak price. It captures the two to four highest hours within the peak window and charges during the one or two cheapest off-peak hours. Hedging against block averages creates basis risk between the financial hedge and the actual hours the battery is physically operating in.
Synthetic tolls & structured swaps (TB2/TB4)
For project financing in particular, many battery operators also enter into a synthetic toll: a structured swap, commonly referenced as TB2 or TB4, that pays the spread between a day's two (or four) highest-priced hours and its two (or four) lowest. These are bilateral instruments, negotiated desk to desk and settled OTC rather than traded on an exchange. There is no natural buyer on the other side — load does not need to sell off its cheapest hours — so the only real counterparty is a merchant trading house, and pricing reflects that: spreads are wide, and terms are typically limited to two to three years. More importantly, the TB2/TB4 payout is a static, perfect-foresight number. It does not track what the asset can actually deliver, and as system-wide battery penetration grows, that gap is widening.
The gap between the peak/off-peak block average and the specific two to four dispatch hours a battery actually targets is the unhedged spread basis. As intraday price curves grow more volatile — driven by renewable intermittency, EV charging patterns, and evolving demand shapes — the difference between block averages and true dispatch-hour prices grows. A battery dispatching into HE17–HE19 every day is fundamentally exposed to those three hours, not the 16-hour peak average. The same problem compounds for synthetic tolls: TB2/TB4 payouts are calculated with perfect hindsight, oblivious to what a real battery can dispatch. As storage penetration increases, system-level state of charge increasingly drives real-time price behaviour — batteries collectively depleting through the day and rebounding in price once they run low, a dynamic a static look-back swap was never built to price.
Where BFUT hourly futures add value
- Lock in the spread precisely by selling BFUT for discharge hours (for example HE18–HE19) and buying BFUT for charge hours (for example HE3–HE4), replicating the battery's intended physical dispatch in the financial markets, hour by hour.
- Eliminate spread basis risk. The financial position matches the operational position at the hourly level, removing the mismatch that peak/off-peak block hedges introduce.
- Layer hedges progressively. Execute BFUT over a rolling three-to-twelve-month horizon as the forward curve presents attractive spread opportunities, building a contracted revenue book without taking large block positions all at once.
- Support project financing. Convert merchant spread revenue into locked-in contracted spreads that lenders and equity investors can underwrite, improving the bankability of new storage assets.
- Complement existing block positions. BFUT adds hourly precision on top of, rather than instead of, broader peak/off-peak hedges — useful for operators managing a portfolio of assets with different dispatch profiles.
Illustrative use cases
| Scenario | Business situation | How BFUT helps |
|---|---|---|
| Precise spread lock | Forward curves show a wide Q3 spread between HE18 (expected evening ramp) and HE3 (overnight low). The operator wants to lock in this spread now rather than risk compression as new capacity comes online. | A battery operator can sell BFUT for HE18 and buy BFUT for HE3 across Q3 months, locking in the spread at current forward prices and bypassing the basis risk inherent in peak/off-peak block hedges. |
| Project finance support | A battery developer needs to demonstrate contracted revenue for construction lending. Pure merchant storage is difficult to finance without predictable cash flow visibility. | Execute BFUT hedges covering 60% of projected year-one dispatch hours, converting those revenues to fixed spread receipts and providing lenders a basis for credit underwriting. |
| Seasonal shape capture | Q4 morning-ramp spreads (HE7–HE8 versus overnight) are pricing wide on the forward curve, reflecting anticipated winter heating demand. The operator wants to capture this seasonal premium before it tightens. | A battery operator can sell BFUT for HE7–HE8 and buy BFUT for HE2 across Q4 months, locking in the seasonal spread. If the spread compresses by delivery, the financial hedge compensates for lower spot realisations. |
| Systemic depletion risk | System-wide battery discharge sets a new high during the evening ramp and the fleet does not fully recharge overnight. The next morning, real-time prices run persistently above day-ahead as the grid absorbs the ramp with less flexible capacity than usual — the same dynamic seen in CAISO on 23–24 June, when a discharge record was followed by a real-time price hangover. | A battery operator can buy BFUT for the specific morning hours most exposed to this rebound (for example HE7–HE9) ahead of periods with elevated system-wide discharge, hedging a price dynamic that a static peak/off-peak block, or a TB2/TB4 swap, was never built to price. |
ElectronX BFUT products are financially settled hourly futures contracts. Contact your ElectronX representative for details.