Your bill
- GDMTH tariff.
- CFE’s tariff for large demand at medium voltage, time-of-use. It charges for energy according to when you use it (base, intermediate and peak) and charges separately for your demand.
- Peak hours.
- The most expensive band of the GDMTH tariff. In the Norte division, 18:00 to 22:00 in winter.
- Billable demand.
- The demand in kW that CFE charges you. It is driven by your maximum demand during peak hours.
- Capacity charge.
- The GDMTH charge calculated on your billable demand.
- Power factor.
- How much of the energy your plant draws is turned into useful work. Below 90 %, CFE adds a surcharge; above 90 %, it gives a credit.
- Reactive energy (kVArh).
- Energy drawn by motors and transformers that does no work. It lowers the power factor.
- Reconciliation.
- The bill we forecast compared with the bill that arrived, every month.
Your system
- BESS.
- Battery energy storage system.
- PCS.
- The BESS power conversion system: it converts the batteries’ direct current into alternating current for your plant, and the reverse to charge them.
- BMS.
- The system that monitors the battery cells.
- EMS.
- The software that decides when the system charges and discharges. ENEGRIN’s is called Ollin EMS.
- Island mode.
- When the system runs isolated from the grid and regulates your plant’s voltage and frequency itself.
- Cogeneration.
- Generating electricity at your plant and recovering the engines’ heat for process steam, hot water or cooling.
- Trigeneration.
- Cogeneration that also produces cooling, with an absorption chiller driven by the engines’ heat.
Regulation
- Self-consumption (autoconsumo).
- The figure in Mexico’s 2025 Electricity Sector Law for generating on your site the electricity you consume. It requires a plant of 0.7 MW or more and a CNE generation permit.
- Isolated self-consumption.
- The plant is not connected to the grid and all its output is consumed on site.
- Grid-connected self-consumption.
- The plant is connected to the grid and can deliver surplus energy to it.
- Abasto aislado.
- The figure in the previous law. The Electricity Sector Law replaced it with self-consumption.
- CNE.
- Mexico’s National Energy Commission: it grants generation permits.
- CENACE.
- Mexico’s National Energy Control Center: the grid operator.
- Grid Code.
- The grid’s technical rules. Since April 8, 2026, it requires a 0.97 power factor for medium-voltage plants of 1 MW or more and for all high-voltage plants.
- Qualified supply.
- Buying energy from an authorized private supplier instead of CFE.
Your contract
- Shared savings.
- The option with no investment: ENEGRIN installs and operates the system and you keep a share of the savings.
- O&M.
- Operation and maintenance fee. If the system does not save in a given month, you do not pay O&M that month.
- OEM.
- Original equipment manufacturer. Our international group is a certified Cummins OEM.
Go to the Ollin Platform and sign up to simulate your real savings with an ENEGRIN BESS.