Calculate demand charge savings from solar PV and battery storage for commercial electricity customers.
Input Parameters
Results
--
Current Demand Charge
$/mo
--
Reduced Peak Demand
kW
--
Monthly Savings
$
--
Annual Savings
$
Note: Demand charges can represent 30-70% of commercial electricity bills. Solar alone has limited demand reduction due to cloud intermittency. Battery storage is essential for reliable demand charge management.
Reference
Current Charge = Peak Demand x Demand Rate
Solar Reduction = Solar Peak x Coincidence Factor
Total Reduction = min(Solar + Battery, Peak x 80%)
New Peak = Peak - Total Reduction
Savings = (Old Charge - New Charge) x 12