Danforth Solar

Solar Power Estimator


Personal Information

Date
Customer Name
Location
Telephone Number
Email Address
System Description

Daily Load Calculation

Description Quantity Power Consumption (per hour) Sub-Total Hours used (per day) Power used (per day)

Array Size Calculator

E Daily energy requirements Wh/day (Calculated above)
i Isolation KWh/m2 per day (Solar Irradiance, the effective amount of full sunshine per day)
epv Power point efficiency % (Efficiency of the solar panels - 80% for normal regulator, 90% for MPPT)
ebat Charge cycle efficiency % (Efficiency of the batteries - 5% loss)
S Array size in peak Watts Wp (The amount of solar power needed to generate the amount of electricity used in one day)
Cost per Watt USD
Estimated cost for solar panels USD (Total watts required multiplied by cost per watt)

Battery Capacity Calculator

E Daily energy requirements Wh/day (Calculated above)
h Holdover in days days
d Depth of discharge %
V Battery bank voltage %
C Battery capacity in ampere-hours Ah
Cost per Ah USD
Estimated cost for batteries USD (Total Ah required multiplied by cost per Ah)

System Requirements Summary

System Specifications
Solar Panels W
Minimum Battery Capacity Ah
Maximum Load W
Solar Panels required
Size of panels used W
Number of panels to install
Total rounded
Difference to make up W
Batteries required
Size of batteries used Ah
Number of batteries / battery bank required
Regulator required
System voltage V
Maximum current A (From solar panels)
Invertor required
System voltage V
Maximum current W
Modified or pure sine wave?
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Danforth Solar

Solar Calculator credits to: www.carima.co.za - Solar System Design