Amp & Watt Hour Calculator & System design Tool

Note: This Amp & Watt Hour Calculator is provided to help you understand some basic electrical terms & calculations. It can give you an estimate of your total power usage (in either amp hours or watt hours).

Note: If you want to get an estimate of the number of solar panels required, you need to leave the Volts at 12. For any 240V appliances, enter the watts AC not Amps AC. If you only know the AC Amps, multiply by 240 to get watts.

Calculate Your Electrical Load in Amp Hours & Watt Hours
Appliance
Watts/
Amps
Power Type
Battery
Volts
%
Battery Losses
% Inverter Losses
Hours Used
Amp Hours
Watt Hours
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
           
Total
Australian Solar Radiation Figures
 
Best Average Performance
Seasonally Adjusted
Sun Tracking Peak
Australian Solar Radiation Figures
Tilt
Peak Sun Hrs / Day
Tilt
Peak Sun Hrs / Day
Sun Hrs / Day
Location
Longitude
Latitude
Angle
Best Month
Worst Month
Angle
Best Month
Worst Month
Best Month
Worst Month
       
 
Select location and click on the Calculate button (ignore boxes with red borders)
Output from One Selected Panel Based On Location and Type of Panel @ 12 Volts
 
Best Average Performance
Seasonally Adjusted
Sun Tracking
Type of panel
Ah/day
Best
Ah/day
Worst
Ah/day
Best
Ah/day
Worst
Ah/day
Best
Ah/day
Worst
Select location (above), Type of panel, and enter the number of panels and click on the Calculate button (ignore boxes with red borders)
Calculate Quantity of Panels Needed Based on Location, Type of Panel & Amp Hours @ 12 Volts
   
Best Average Performance
Seasonally Adjusted
Sun Tracking
Type of panel
Daily
Amp Hours
Number Panels Best
Number Panels worst
Number
Panels
Best
Number Panels worst
Number
Panels
Best
Number Panels worst
Select location (above), Type of panel, and enter Daily amp hours and click on the Calculate button (ignore boxes with red borders)
Battery Size Amp Hours @ 12 volts
Battery Size
Daily AmpHours
Battery Size
 

Enter the daily amp hours and click on the Calculate button (ignore boxes with red borders)