Solar Electricity
Solar Azimuth Loss Calculator
The purpose of Solar Azimuth Loss is to turn reference energy and orientation loss into azimuth-adjusted energy. Keep the source condition with the saved result so later comparisons remain meaningful.
Calculate Azimuth-adjusted energy
Use measurements from one operating condition.
From inputs to result
Start with the equation energy = reference × (1 − loss). Its variables correspond to Reference energy and Orientation loss.
The defaults produce 18.60 kWh. Replace them with measurements from one operating state.
Calculate azimuth-adjusted energy from reference energy and orientation loss. Adjusted panel power can be checked separately in Solar Panel Temperature Loss Calculator.
What the number means
The primary answer, Azimuth-adjusted energy, describes only the entered scenario. Compare it with cold-voltage, hot-voltage, current, energy-yield, and controller limits.
Store the measurement state and conversion notes with the answer.
Preparing the calculation
Use site-specific irradiance, temperature, shading, and equipment data. Write down whether each entry is measured, rated, assumed, or calculated.
Confirm decimal placement whenever a source uses a different unit scale.
- Reference energy
- Default example: 20 kWh. Enter reference energy in kWh.
- Orientation loss
- Default example: 7%. Enter orientation loss in %.
Assumptions and limitations
The loss factor depends on latitude and season.
Additional checks may be needed for weather variability, mismatch, clipping, soiling, degradation, and curtailment. Document which effects were checked elsewhere in the analysis.
Record module orientation, string configuration, and controller operating window.
Keep a reproducible record
Save reference energy and orientation loss with azimuth-adjusted energy. Add the date and any unit conversion.
Carry azimuth-adjusted energy without rounding when it becomes another input. Do not round between dependent calculations.
Using this result in a larger analysis
Check the source of reference energy before calculating. A credible result requires every field to describe the same physical condition and unit basis.
Use azimuth-adjusted energy alongside cold-voltage, hot-voltage, current, energy-yield, and controller limits. Preserve the unrounded number until all dependent calculations and comparisons are complete.
If uncertainty remains, calculate labeled low and high cases. Include seasonal resource variation and controller or inverter operating windows when those effects can change the decision.
Questions about inputs and assumptions
What is not captured by this equation?
The loss factor depends on latitude and season. A broader review should include weather variability, mismatch, clipping, soiling, degradation, and curtailment.
Why might measured azimuth-adjusted energy differ?
Differences can come from weather variability, mismatch, clipping, soiling, degradation, and curtailment, measurement uncertainty, or values taken under different conditions.
How do I run a useful sensitivity check?
Change one uncertain entry at a time and preserve the baseline. Use site-specific irradiance, temperature, shading, and equipment data.