Solar Panel Calculator

Solar Panel Calculator main image Solar Panel Calculator image
 
  Calculation Type Value

 

Estimated Watt demand

 

3 Total Watts Per Hour (DC)
DC Amps x System Voltage
Watts

 

Hours per day

 

6 Hours Equip is expected to run (24hr)
as per application
Hrs d-1

 

Watt-Hours per day

 

9 Total daily usage
Watts x Hours
216.00 Watt-Hrs d-1

 

Amp-hour calculation

 

10 Total watts
Daily requirements
216.00 Watt-Hrs d-1
11 Corrected for battery losses
Assumes static average loss
220.320 Watt-Hrs d-1
12 System voltage
DC voltage only
Volts
13 Amp-hours per day
Watts divided by Volts
9.180 Amp-Hrs d-1

 

Battery bank calculation

 

14  Days backup power required
Average 24 hour periods
days
15 Amp-hour storage
Raw capacity you need
  Amp-Hrs
16 Depth of discharge
Assumes 50%
0.5 fraction (enter decimal)
17 Required amp backup
Prevents excessive discharge
  Amp-Hrs
18 Battery Amp Rating (20 hr)
Battery Capacity in Amps
fraction
19 Actual # batteries wired in parallel
Raw number
  
20 Batteries wired in series
Relates to system voltage
2.00
21 Rounded number of Batteries
Always rounded up
 

 

Solar Panel Array calculation

 

22 Sun hours per day (Direct only)
Be realistic!
Hrs
23 Worst-weather multiplier*
1.55 default
1.55 fraction
24 Total sun hours per day
Assumes average sun
  Amp-Hrs
25 Select panel size (Watt rating)
Watt hour rating
Watts
26 Nominal Panel Voltage
Approximate Solar output
16 Volts
27 Amps required from solar panels
Total daily consumption
9 Amps
28 Peak amperage of solar panel
Watts divided by Volts
  Amps
29 Number of solar panels in parallel
Raw Number
 
30 Number of panels in series (12 V)
it is 1 for 12v, 2 for 24v, etc
2
31 Rounded number of solar panels
Always rounded up
 

 

Choose Your Solar Battery Charger