Separate production from savings
State directly used energy, exported energy and any battery losses. Show how the contract values each flow.
Mirasol · Los Cabos
Turn annual CFE kWh into a first solar-size estimate. Check the yield assumption, roof limits and export treatment before comparing panel counts.
Mirasol guide · Updated
Illustrative inputs: 12,000 kWh/year of demand and an assumed net yield of 1,600 kWh per installed kW per year. Dividing gives 7.5 kW. These are teaching assumptions, not a production forecast for your roof.
| Input | Calculation |
|---|---|
| Annual demand | 12,000 kWh |
| Assumed net yield | 1,600 kWh/kW/year |
| Starting capacity | 12,000 ÷ 1,600 = 7.5 kW |
| At 500 W per panel | 7,500 ÷ 500 = 15 panels |
Annual production does not show when you will use the electricity. The proposal still needs roof shading, usable area, electrical limits and the actual CFE contract.
State directly used energy, exported energy and any battery losses. Show how the contract values each flow.
Allow for access, drains, equipment, future repairs and structural review. Satellite area is a screening input.
Request annual production with assumptions, the remaining CFE bill, installed scope and maintenance exclusions. If one proposal has more panels, ask which additional load or contract credit makes them useful.
Check the annual DAC calculation first.
Distinguish the meter from the export-credit contract.
FAQ
The annual kWh, roof and contract determine the design. A tariff label or the pesos total alone cannot determine panel count.
Yes. Timing, export treatment, fixed charges and other bill items matter. Ask for the modeled bill components rather than a zero-bill promise.
No. The yield and panel size are declared assumptions. Your roof assessment and equipment data must replace them.
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.