cfe-rates

CFE Electricity Rate Lookup

You have access to the cferates CLI tool to query electricity rates from Mexico's CFE (Comisión Federal de Electricidad).

Setup

First, check if the local marketplace checkout exists at ~/.claude/plugins/marketplaces/cferates/. If it does, use it as the source. If not, fall back to the remote repository.

if [ -d ~/.claude/plugins/marketplaces/cferates ]; then
    CFERATES_SRC=~/.claude/plugins/marketplaces/cferates
else
    CFERATES_SRC=git+https://github.com/cyraxjoe/cferates.git
fi

Then run with uvx:

uvx --from "$CFERATES_SRC" cferates RATE [OPTIONS]

Rate Types

Domestic

Rate	Description	Requirements
1	Basic domestic	None
DAC	High-consumption domestic (no subsidy)	None
1A–1F	Regional domestic with summer variation	--summer-month required

Industrial

Rate	Description	Requirements
GDMTO	Gran Demanda Media Tensión Ordinaria	--state, --municipality, --division
GDMTH	Gran Demanda Media Tensión Horaria	--state, --municipality, --division
DIST	Demanda Industrial Subtransmisión	--state, --municipality, --division
DIT	Demanda Industrial Transmisión	--state, --municipality, --division
APMT	Alumbrado Público Media Tensión	--state, --municipality, --division
RAMT	Riego Agrícola Media Tensión	--state, --municipality, --division

Options

• -y, --year YEAR — Year to query (default: current year, min: 2018)
• -m, --month MONTH — Month to query (default: current month, 1–12)
• -s, --summer-month MONTH — Month summer starts (2–5). Required for rates 1A–1F
• --state ID — State ID (1–32). Required for industrial rates
• --municipality ID — Municipality ID. Required for industrial rates
• --division ID — Division ID. Required for industrial rates
• --no-cache — Disable caching

Common City → Rate Mapping

Use this to infer the rate type when the user mentions a city:

City/Region	Typical Rate	Summer Month
Mexico City / Central Highlands	1	N/A
Monterrey / Nuevo León	1C	4
Guadalajara / Jalisco	1	N/A
Hermosillo / Sonora	1F	3
Mexicali / Baja California	1F	3
Mérida / Yucatán	1D	4
Culiacán / Sinaloa	1E	3
Tampico / Tamaulipas	1D	4
Ciudad Juárez / Chihuahua	1C	4
Cancún / Quintana Roo	1C	4

Output

The CLI returns JSON. Domestic rates include keys like Basico, Intermedio, Excedente (values in MXN/kWh). Industrial rates include keys like fijo, variable, distribucion, capacidad.

DAC Threshold Awareness

When discussing DAC (Doméstica de Alto Consumo) classification, do NOT assume a single universal threshold. Each domestic tariff has its own DAC limit:

Tarifa	DAC Threshold
1	250 kWh/mes
1A	300 kWh/mes
1B	400 kWh/mes
1C	850 kWh/mes
1D	1,000 kWh/mes
1E	2,000 kWh/mes
1F	2,500 kWh/mes

Source: https://app.cfe.mx/Aplicaciones/CCFE/Tarifas/TarifasCRECasa/Tarifas/TarifaDAC.aspx

The threshold varies significantly by region/climate — hotter regions (1E, 1F) allow much higher consumption before DAC kicks in because air conditioning is expected. A user in Monterrey (1C) can consume up to 850 kWh/month before being reclassified, while a user in Mexico City (tarifa 1) hits DAC at just 250 kWh/month.

DAC is triggered when the user's 12-month rolling average exceeds their tariff's threshold — not a single month's spike.

When warning users about DAC risk:

1. First identify their tariff from the city mapping
2. Use the correct threshold for that specific tariff
3. If the user provides historical consumption, calculate their 12-month average and compare against the correct threshold before making any DAC claims

Instructions

1. When the user mentions a city, map it to the appropriate rate and summer_month using the table above. If unsure, ask.
2. Run the CLI command and present the results in a readable table.
3. Briefly explain what each tier means (Básico = first ~75 kWh subsidized, Intermedio = next block, Excedente = above that, most expensive).
4. Only mention DAC risk if the user provides consumption data — use the correct threshold for their specific tariff (see table above), not a generic 250 kWh value.