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Index
Battery Storage & ESS Index
official“An index of public companies leveraged to grid-scale battery energy storage systems — integrators, manufacturers, and software firms enabling renewable firming.”
built · 2026-04-30 21:38·rebalance · quarterly·next run · 2026-07-30
creator narrative
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backtest · S&P 500 (SPX)·range
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risk-free raterf = 4.50%
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no backtest data
attribution factsheet
holdings · 9
click a row to drill in ↗NameAllocation· cap 25%Rationale
TSLATeslaConsumer Discretionary25.00%Megapack — fastest-growing utility-scale ESS franchise.FLNCFluence EnergyIndustrials18.00%AES-Siemens JV; pure-play ESS systems integrator.STEMStem IncIndustrials10.00%AI-driven energy storage software.ENPHEnphase EnergyTechnology10.00%Residential solar + battery system leader.RUNSunrunIndustrials8.00%Residential solar + storage installer.ALBAlbemarleMaterials8.00%Largest US lithium producer feeding ESS supply.EOSEEos Energy EnterprisesIndustrials7.00%Zinc-bromide long-duration storage manufacturer.QSQuantumScapeTechnology7.00%Solid-state battery developer for stationary and EV.ENSEnerSysIndustrials7.00%Industrial and reserve-power batteries for telecom and grid.
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weighting · market_cap · cap=25%
rebalance · quarterly