System Sizing Estimator

Use our estimator to get a pretty good idea of how many Solar Panels you will need to generate electricity and how many Storage Batteries you will need to store that electricity.


The estimator lets you add basic information about the power requirements of the appliances in your home that need to be powered by the solar system.


You need the following information about your appliances.

1) Power rating (Watts)

Most appliances have a power rating recorded on a data plate or on the plug telling you how much power they use (measured in Watts ).Sometimes the Watts are not shown, and only the voltage (240V) and amps (example 1.05A) are given. 


Voltage, measured in volts (V) and

Current, measured in Amps (A)  can be used to calculate the power requirement 

 Volts x Amps = Watts


240V x 1.05A = 252W

If you cannot see the Watts, simply type in the Volt and Amp values in the sizing calculator and the Watts will be instantly calculated.

2) Running time of appliances (hours)

How many hours per day do you intend to run your appliances on solar or back up battery power. This includes day time and night time hours 

With this info, we calculate the WattHours required for each appliance. The total WattHours of all appliances will  then be used to calculate the minimum battery bank size and number of solar panels  based on our typical system configurations.


it is recommended not to discharge lead acid, AGM or Gel batteries by more than 50% to ensure long cycle life. Therefore the battery bank size in WattHours is calculated as double the daily Watthour requirement.    


Check behind appliances like T.V's for data label


Data label should have device power rating in Watts (W).


Appliances like refrigerators usually have data labels inside.


When power rating is not clearly given, use the Volts and Amps.


Devices like Laptops will have the power information on the adapter.


Power details might be given in Watts or Volts (V) and Amps (A).

Call Us Now:
078 733 0215​​