A beach hotel in Mexico consumes on average 466 kWh per square meter a year. A city hotel consumes 303. Both figures come from a 2008 CONUEE survey reproduced in the guide to energy efficiency in hotels in warm climates published by SEMARNAT and GIZ in June 2020. The same guide, on CONUEE data of 2009, puts the energy bill at 5 to 20% of a property's operating cost, second or third after payroll, and states that air conditioning alone can reach half of it.
Those numbers size the exposure. They do not tell a general manager which project to fund. That answer sits in the shape of the CFE invoice. A Mexican property supplied in media tensión with contracted demand above 25 kW a month buys power on a Gran Demanda en Media Tensión schedule, where kilowatt hours and kilowatts are billed on separate lines and respond to different measures. That is the threshold CRE printed in the schedules published in the DOF on 28 January 2022. A property supplied in alta tensión is billed on a different schedule again.
The question to settle before approving a retrofit is which line of the bill a measure touches. Chiller plant sequencing and an LED replacement both cut consumption. Only one of them moves billed demand.
What the CFE invoice charges a hotel for
On the Gran Demanda en Media Tensión Horaria schedule, CFE bills energy in three daily periods, base, intermedio and punta, with the boundaries set by season, day type and distribution division. Two further charges are levied per kilowatt, distribución and capacidad. Neither of those falls because guests used fewer kilowatt hours over the month. They follow the peaks the property sets.
A second adjustment sits underneath. An acuerdo published in the Diario Oficial de la Federación on 31 October 2000 governs the power factor charge. A customer whose average power factor for the billing period falls below 90% lagging pays a surcharge calculated as a percentage of the invoice amount, capped at 120%. A customer above 90% receives a bonus capped at 2.5%. In a hotel the driver is motor load, meaning chillers, cooling tower fans, pumps, laundry and lifts. Correcting it is capacitor work rather than a retrofit.
A property that has never separated these lines cannot rank its own projects. Establishing that split is the first thing an energy audit for a commercial user should deliver, ahead of any equipment recommendation.
Which measures move kilowatt hours and which move demand
Guest room occupancy controls, LED replacement, laundry heat recovery and hot water pipe insulation act on consumption. Their effect spreads across the day, so they cut energy in all three periods roughly in proportion to when the load was running.
Chiller plant work acts on both quantities. Sequencing multiple machines against the actual cooling load, resetting condenser water temperature and fitting variable speed drives on primary pumps reduce kilowatts at the moment the plant is heaviest. Shifting laundry and kitchen preparation out of the punta window does the same thing without capital.
The distinction matters because a Mexican resort's peak follows occupancy and outside air temperature at the same time. A property running near capacity in the hot season and half empty in the shoulder season does not set its billed demand in both. Measures that only lower average consumption leave that number roughly where it was.
What the Código de Red requires above 1 MW
The obligation a Mexican hotel actually carries is grid compliance rather than sustainability policy. CRE issued the Código de Red as RES/151/2016, published in the DOF on 8 April 2016, and reissued it as RES/550/2021, published in the DOF on 31 December 2021 and in force from 1 January 2022. The obligations reach load centers connected in media tensión with contracted demand of 1 MW or more, and every load center connected in alta tensión.
A large integrated resort with a central chiller plant usually sits inside that band. A small urban property usually does not. The contracted demand printed on the invoice settles which side the hotel is on, and it is worth checking before a capacity increase pushes the site across the line.
Compliance is measured rather than asserted. Instruments must meet NOM-001-CRE/SCFI-2019 or IEC 61000-4-30 Class A, and harmonic, flicker and imbalance limits are assessed on the 95th percentile of weekly records. The power factor band of 0.95 lagging to 1.0 set in the resolution is not enforceable until 8 April 2026. Through 2023 the power factor exposure a hotel actually pays for remains the CFE billing surcharge.
Mexico raised its unconditional national target to 35% below its business as usual path by 2030 in the updated Nationally Determined Contribution presented in November 2022. That commitment binds the state and not the property. It is not a line a hotel can budget against.
On-site solar and the 0.5 MW line
Article 17 of the Ley de la Industria Eléctrica, published in the DOF on 11 August 2014, exempts generation below 0.5 MW from holding a CRE generation permit. It exempts nothing else. A rooftop array at a hotel still needs an interconnection contract with CFE Distribución, municipal construction and land use approval, and structural sign off on the roof.
The export arrangement matters more than most proposals admit. Under CRE's distributed generation rules, RES/142/2017, published in the DOF on 7 March 2017, medición neta credits surplus against later consumption rather than paying cash for it. Credit still unused after twelve months is liquidated at the local marginal price of the node, which sits well below the retail tariff. A resort that exports at midday and sets its peak after sunset carries the credit forward and still pays the same demand charge. That is the arithmetic to run before signing for on-site solar in Mexico.
Resilience is a separate purchase
CENACE declared an Estado Operativo de Alerta in the Sistema Interconectado Nacional on the night of 20 June 2023, with operating reserve below 6%, as reported by Infobae on 21 June 2023. An alert is a reserve condition rather than an interruption, and no property lost supply because of the declaration itself. What it marks is how thin the national margin gets in a Mexican summer, which is the same week a resort is full.
Efficiency lowers exposure to price and to consumption. It does not keep the property running when supply stops. Continuity is bought separately, through generation, storage and the switchgear needed to island a critical panel, and each of those carries its own capital cost and maintenance contract. Treat them as two budgets and two business cases.
Neither can be sized without interval data. Sub-metering and monitoring at the chiller plant, the laundry, the kitchen and the guest room risers tells a hotel which load sets the monthly peak. A stack of monthly invoices does not.
What the evidence does not support
Three claims are routinely attached to hotel efficiency proposals in Mexico, and Mexico Energy Partners could not verify any of them for this market.
The first is a resale or refinancing premium for energy efficient hotel property. No published Mexican appraisal or transaction study measuring such a premium could be identified. Underwrite the project on operating cost and treat any valuation effect as unproven here.
The second is a measured link between HVAC retrofits and guest satisfaction scores. The engineering claim stands, because a correctly sized and controlled system holds temperature and humidity more tightly. The satisfaction claim needs the property's own complaint data before and after the work, which is a measurement a hotel can run for itself at no cost.
The third is that electrifying resort shuttles cuts the property's energy cost. It moves diesel spend onto the electricity account and adds load. Charging inside the punta window would raise both the energy rate paid and the peak that sets the demand charge. If the fleet is electrified for other reasons, schedule the charging into the base period and check the effect on contracted demand first.
Send us a year of invoices and your occupancy data
Mexico Energy Partners reviews hotel electricity accounts before proposing any work. You supply twelve months of CFE invoices, monthly occupancy, the room count, and the chiller and boiler operating schedule. We report back on which charges your spend actually sits in, where the monthly peak is being set, and what a chiller plant and hot water assessment would cover. The review is desk based, and a site visit is proposed only if the invoices leave a question the data cannot answer. No savings figure is offered before measurement.
Sources
- SEMARNAT and GIZ, Guía de eficiencia energética en el diseño, construcción y operación de hoteles en climas cálidos, June 2020, citing CONUEE data of 2008 and 2009 for the kWh per square meter and operating cost share figures.
- Secretaría de Hacienda y Crédito Público, acuerdo on the power factor surcharge and bonus, DOF, 31 October 2000.
- CRE, RES/151/2016, Código de Red, DOF, 8 April 2016.
- CRE, RES/550/2021, Código de Red, DOF, 31 December 2021, in force 1 January 2022.
- CRE, RES/142/2017, disposiciones administrativas de carácter general para generación distribuida menor a 0.5 MW, DOF, 7 March 2017.
- Congress of the Union, Ley de la Industria Eléctrica, DOF, 11 August 2014.
- CRE, tariff schedules for CFE Suministro Básico, published in the DOF on 28 January 2022. Category "Gran Demanda (mayor a 25 kW-mes) en Media Tensión", horaria and ordinaria, and the DIST and DIT categories in alta tensión.
- CFE, Gran Demanda en Media Tensión Horaria tariff schedule, published monthly by distribution division.
- Infobae, report of the CENACE Estado Operativo de Alerta declared on the night of 20 June 2023, published 21 June 2023.
- Enerdata, report on Mexico's updated Nationally Determined Contribution, 21 November 2022.