There is a moment in almost every property search when somebody asks what the electricity costs.
The answer is usually a bill from a pleasant month.
That is not the same thing.
If you are looking at a house on the Riviera Maya, ask for twelve months of bills. Not the seller's memory of the bills. Not the lowest receipt in the folder. The actual history attached to that meter.
Summer is when the house stops posing for photographs. Air conditioners run longer. Pools keep circulating. Pumps, refrigerators, dehumidifiers and water systems keep doing their jobs. If the property sits empty, some of those loads keep running anyway.
The line that matters is not one month
Mexico's Federal Electricity Commission, CFE, classifies domestic high consumption using a moving twelve-month average. The limit depends on the tariff assigned to the locality. CFE's current high-consumption guide lists different limits for Tariffs 1 through 1F.
The number only becomes useful when it is matched to the tariff printed on the bill for the property you are evaluating.
One heroic month of low consumption does not necessarily undo eleven expensive ones.
Find the tariff printed on the bill. Then confirm the current high-consumption limit for that exact service with CFE or a qualified local professional. Do not borrow a threshold from a neighbour, a Facebook group or an article written for another city.
Match the bill to the way the house was used
A twelve-month file still needs context. Was the house occupied full-time, used only on weekends or sitting empty between rentals? Were all bedrooms cooled? Was the pool operating normally? Did a renovation add equipment halfway through the year?
Ask the owner to mark occupancy and major equipment changes beside each billing period. You are not asking for a perfect engineering study. You are trying to avoid comparing your future full-house use with somebody else's half-empty year.
If the bill history and the story do not match, keep asking. A meter can be shared, replaced or attached to equipment you did not notice during the viewing. The account number and service address should follow the same property all the way through the file.
That usage context belongs beside the bills in your owner file.
Solar and backup power solve different problems
I installed thirty grid-tied solar panels first. Batteries came later. That sequence reduced the bill before it gave us backup power.
“The bill and the blackout are two different problems.” — From Vacation to Owner, Chapter 13
Grid-tied solar can reduce how much electricity you buy over time. A battery or generator can keep selected loads running when the grid goes down. The right combination depends on the meter history, the property's equipment, the interconnection arrangement and what you consider essential during an outage.
CFE currently describes three compensation arrangements for eligible home interconnections: net metering, net billing and total energy sale. Which arrangement applies, and what approvals are required, should be confirmed for the actual installation.
Friction Point: A low bill can be accurate and still be misleading if it comes from the wrong month, a lightly occupied house or a meter with a different twelve-month history.
Reality Checklist
- Twelve consecutive months of CFE bills for the exact meter.
- The tariff and service details shown on the bill.
- An inventory of the property's large electrical loads.
- The solar agreement, equipment list and production records, if solar already exists.
- A separate list of what must keep working during an outage.
“Does the house have solar?” sounds useful. “What works at 2:00 a.m. when the grid is down?” is useful.
Do this before the offer, not during the week of closing. Once the property feels emotionally yours, every missing document starts looking like a detail instead of evidence.
The August bill is not trying to ruin the dream. It is showing you how the house behaves under stress.
Sources checked August 3, 2026: CFE high-consumption tariff guide and CFE home interconnection guidance. Verify the actual property's tariff, bills and agreement.