Do not confuse credits with cash
Use the contract’s actual credit rules and billing periods. A pesos-equivalent teaching example is not a promise of cash payment.
Mirasol · Los Cabos
Compare three export-value assumptions using the same solar production. Keep energy savings, battery costs and remaining CFE charges separate.
Mirasol guide · Updated
Illustrative monthly inputs: 600 kWh solar production, 240 kWh used directly and 360 kWh exported. Assume avoided purchased energy is worth 6 MXN/kWh. This is an arithmetic example, not today’s CFE rate or a forecast for a particular roof.
| Export assumption | Calculation | Energy value |
|---|---|---|
| 0 MXN/kWh | 240 × 6 + 360 × 0 | 1,440 MXN |
| 2 MXN/kWh | 240 × 6 + 360 × 2 | 2,160 MXN |
| 6 MXN/kWh | 240 × 6 + 360 × 6 | 3,600 MXN |
The table shows sensitivity, not three available CFE offers. Under applicable net metering, eligible exports can offset imported energy. Separate export compensation uses different rules. A zero-export system would limit or store the unused production rather than export the 360 kWh.
Use the contract’s actual credit rules and billing periods. A pesos-equivalent teaching example is not a promise of cash payment.
The direct-use amount needs measured timing or an explicitly stated assumption. The same monthly kWh can have different daytime demand.
Storage can shift energy to later use, with losses and capacity limits. Price the battery, inverter changes, backup equipment, maintenance and eventual replacement separately. Compare its added annual benefit with its added cost; do not assign a universal payback.
Identify the contract behind the export assumption.
Specify backup power and usable energy before pricing storage.
FAQ
It can be, depending on usable daytime production, system cost and the tariff. Request the actual scenario and compare it with a smaller system or shifted loads.
That can be appropriate only where the actual tariff and contract support the modeled offset. Show which energy is used directly, credited, sold or curtailed.
No. The table isolates energy value. The complete proposal must show the remaining bill, taxes where applicable, financing and ownership costs.
Sources
These references provide technical context. Your location, energy needs and project scope still need an individual assessment.
Ready to start?
Use your CFE bill for an initial assessment. Roof conditions, equipment and the final scope need confirmation before installation.