Total revenue (energy + FCAS + FPP) divided by registered MWh storage capacity for the selected period. Normalises for battery size and duration — allows direct performance comparison between batteries of different power and energy ratings on the same basis.
Revenue per MWh is a battery's total revenue — energy arbitrage, all ten FCAS markets, and estimated FPP — divided by its registered energy storage capacity in megawatt-hours, for a chosen period. Where revenue per MW normalises for power, revenue per MWh normalises for size and duration together, allowing a direct comparison between batteries with very different power and energy ratings on a single, consistent basis.
The two metrics tend to rank units differently and that difference is informative. A short-duration battery (say one hour) usually looks strong on revenue per MW, because it packs its whole capacity into the few highest-value intervals, but weaker on revenue per MWh, because it has little stored energy to spread across the day. A long-duration battery shows the opposite pattern. Looking at both together is the clearest way to see whether a unit's performance is being driven by favourable sizing or by genuinely good dispatch — which NEMPulse measures separately as its capture rate.
Related terms: Revenue per MWEnergy Capture
See also: Performance rankingsBattery fleet
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