BRAZIL BESS | Market structure and business mechanisms MIO-BESS-BR-001 | R4 | Editorial cut-off 23 October 2026 Brazil combines different markets around battery storage: equipment and integration, construction, asset ownership, flexibility trading, software, maintenance, replacement, behind-the-meter applications, end of life and financing. Economics depend on function and contract. Registered pipelines, announced factories and delivered equipment represent different stages and flows. EPE's August 2026 registration covers 6,091 projects and 296,807 MW. These are neither awards nor operating capacity. The two auctions overlap; published power figures leave a 1 MW reconciliation residual, retained without assigning an unverified cause. [S01,S02] The targeted panel contains fourteen records and is not a census. It covers Registro transmission, Coronel Vivida distribution, Sol de Brotas testing, isolated projects, bus charging, agriculture and hospitals. Power, energy, design and operation retain separate fields. All records are not summed as national stock. Agriculture and hospitals illustrate different channels. Expofrut documents a service model with announced net savings; Larssen adds two units with different functions. Battery delivery at HCP was funded through an efficiency programme, which does not establish that every hospital can self-fund a purchase. Announced returns and savings remain estimates rather than an independent series of measured outcomes. [S40-S47] Economic comparisons distinguish historical investment references, current quotations and revenue. The original 3 MWh scenario shows how positive energy savings can coexist with negative NPV. A second calculation uses the same asset to compare the provider's minimum fee and the customer's energy-value ceiling. Tariffs and most parameters are assumptions; the example is neither an actual project nor an investment recommendation. An offline Python 3 tool reviews inputs, units, scope, duplication and service economics. It neither authenticates documents nor corrects false inputs marked as confirmed. SAM is a strong substitute for detailed simulation; the included tool has a narrower purpose. [S48,S49] National monetary spending and spending by line still lack reconciled denominators. The study provides bounded magnitudes, cases, mechanisms and scenarios, rather than a fabricated TAM, guaranteed returns or engineering, legal or tax advice. Sources, dates, formulas and limitations are retained in the report and reference register.