Sighten‘s production model incorporates key aspects of the industry’s most sophisticated models while maintaining simplicity of user inputs.
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Simple and non-assumptive user inputs required: module and inverter quantities/models, pitch, azimuth, and shading
Hourly production calculations with granular weather data
Module and inverter-level electrical behavior modeled
Overview
User inputs | Irradiation | Module output | Array output |
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Sighten vs PVWatts
| Component | Sighten | PVWatts |
|---|---|---|
Weather data | NREL TMY Stations | NREL TMY Stations |
Shading | SAM2 shading model | User input |
Module production | DeSoto 5-parameter | User derate input |
Inverter clipping | Sandia MPPT Tracking | None |
Inverter efficiency | SAM CEC Efficiency | User input |
Sighten Production Calculation
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- Optimizers (SolarEdge): If the array uses string inverters with optimizers
- Same methodology as for microinverters, but using the following derate factors:
- wiring dc = 0.980
- mismatch = 1.000
- diodes = 0.995
- soiling = 0.950
- wiring ac = 0.990
- Same methodology as for microinverters, but using the following derate factors:
References
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Simulating SolarEdge in PVWatts
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