Calculate additional savings from solar under time-of-use (TOU) rate structures where peak rates are higher.
Input Parameters
Results
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Annual TOU Savings
$
--
TOU Premium vs Flat
$
--
Peak Energy Value
$/yr
--
Flat Rate Equivalent
$/kWh
Note: TOU rates reward solar production during peak hours (typically 2-7 PM). Adding battery storage allows shifting off-peak generation to peak periods for maximum savings.
Reference
Peak kWh = Daily Prod x Peak%
Off-Peak kWh = Daily Prod x (1-Peak%)
With Battery: shift min(Battery x 90%, Off-Peak) to Peak
Daily Value = Peak kWh x Peak Rate + Off-Peak kWh x Off-Peak Rate
TOU Premium = TOU Annual - Flat Rate Annual