MWatt Hubpower-sector data

Power-sector tools

Data: 22/07/2026 · MWatt Hub catalog

14 data products and 20 calculators, built on official sources. Search, open, share the URL. Every figure with source and date.

1,774 TUST busbars · cycle 2026/2027 (Despacho nº 2.269/2026) · 931 substations in the connection queue · 283 plants with measured curtailment

Read our data-honesty commitment → (in Portuguese)

  • Spotcast — Hourly PLD forecast, with a public track record
  • TUST — TUST by busbar, without mining ANEEL spreadsheets
  • Curtailment — How much wind and solar did Brazil curtail?
  • Grid connection queue — Basic Grid access, by substation
  • Pre-budget — Honest triage before the distributor's connection quote
  • BESS — Where is a utility-scale battery worth it in Brazil?
  • SimSolar — Is rooftop solar worth it at your home?
  • Data centers — AI data centers in Brazil — map and ranking
  • Capex ANEEL — Where does the money go in a Brazilian power plant?
  • Mine BTC — Mine bitcoin at home or buy it?
  • Where to mine — Where in the world is power cheap enough to mine bitcoin?
  • Buzz — What's hot in the power sector, measured — not guessed
  • Viz — Visualize pandapower networks directly in your browser
  • Watts — Track home electricity use from meter readings, bills or smart-meter data
  • MWatt AI — AI agent for power-system studies
  • AI agents in power systems engineering — What AI agents already deliver in grid studies and what still depends on an engineer — task by task, judged by whether the result is verifiable
  • Grid connection journey — The actual path for generation and load: owners, timelines, common failures and tools at each step
  • Pay less — Find which path to evaluate first: bill audit, benefit, solar, subscription, time-of-use or efficiency
  • Energy subscription — Got an offer? Calculate the effective discount after wire B, minimum billing and public lighting
  • White tariff — Is switching worthwhile? Compare peak, shoulder and off-peak rates with the standard tariff
  • Social tariff — Check eligibility and simulate the first 80 kWh of free electricity
  • Bill auditor — Is your power bill correct? Open reconstruction with tariff, flag, minimum bill, wire B and taxes
  • Hosting capacity map — Estimated DG hosting capacity per feeder — 51 utilities / all 27 Brazilian federative units (BDGD)
  • Grid connection — transmission — Large generator on the Basic Grid via ONS — official margins, access study, queue and PLD
  • Connect large load — Data center, mining and BESS as large load — access, grid study and connection cost
  • Energy unit converter — MWh, MWm, kW, kWp, GWh/year and tariffs R$/MWh ↔ ct/kWh
  • EUST calculator — Monthly and annual EUST from TUST (R$/kW·month) and MUST (kW)
  • Tariff flag — Current flag, history and bill calculator (kWh × surcharge) — ANEEL
  • Spot price (PLD) now — Current hourly PLD by submarket and next 12 h (Spotcast)
  • My utility — What 30 utilities publish (map, portal, forms) — shortcut to Pre-budget
  • Minimum bill by utility — The minimum monthly charge for each of Brazil's 51 distribution utilities
  • Availability cost (minimum bill) — 30 / 50 / 100 kWh × tariff (R$/kWh) — group B minimum (REN 1.000)
  • DG deadlines — MMGD connection deadline table from REN 1.000/2021, article by article
  • Distributed generation modalities — Local, remote, shared and multi-UC — Law 14.300 definitions and which to choose
  • Net metering and Law 14.300 (wire B) — SCEE, credits (60 months), wire-B schedule (2026 = 60%) and rights until 2045
  • Brazilian power sector glossary — PLD, TUST, MMGD, SIN and other terms — neutral definition with link to official source
  • Methodology — Honesty commitment — source and date on every figure

Newsletter

An occasional email with what the data showed — monthly curtailment, new tariff cycles, Access Season milestones — always with figure, source and method. No spam, no list selling.

FAQ

What is MWatt Hub?
MWatt Hub is the data-tools platform for Brazil's power sector (and European power prices) maintained by Matheus Duarte. The public free tools: PLD (Brazil's spot price) forecasts with a public track record (Spotcast), TUST (transmission tariff) by busbar (TUST), curtailment history (Curtailment), Basic Grid access by substation (Grid connection queue), GD connection pre-quote (Pre-budget), battery pre-feasibility (BESS), residential solar viability (SimSolar), AI data centers, plant Capex ANEEL, bitcoin mining (Mine BTC / Where to mine), sector buzz (Buzz), and pandapower network visualization (Viz). And Matt: an AI agent that runs interconnection studies (power flow, N-1 contingency) on your network model.
Are the data reliable? Where do they come from?
Every figure comes from official open sources — ONS, CCEE, ANEEL, EPE and MME — with the origin document and date cited. Derived values are labeled as own calculations, assumptions are marked as assumptions, and what has no source shows as missing: we never estimate in place of the official figure.
How much do the tools cost?
The tools are public and free. Some products offer deeper reports on demand, always marked on the product page itself.