Grid-Tie Solar Calculator

This grid-tie solar calculator generates a Solar Electricity Analysis that will allow you work out how many solar panels you will need to create a theoretical 'carbon neutral' building, where you sell surplus energy you make from your solar panels to the electricity utility company and then buy energy from the utilities when your system is not generating enough power in the evenings.  The analysis takes into account your electrical requirements, your geographical location and the likely position of your solar panels.

The analysis document is e-mailed to you and provides approximate costs for getting a system installed.

This grid-tie solar calculator is designed to work in conjunction with The Solar Electricity Handbook.

Grid-Tie Solar Calculator Questionnaire

Project Title (i.e. what are you calling this project):


Select Country:

Select Town/City:
Select Panel Direction:
Select Panel Angle:

Energy Usage

Enter how many kWh of electricity you have used over the last year (you can usually find this figure on your electricity bill, either expressed in 'kWh' or 'units'. 1 unit = 1 kWh):

Number of kWh/units:     

Alternatively, if you know the figures, enter the kWh per month figure for each month of the past year:

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
(You may leave these figures blank if you do not have these figures. However, you will get a far more accurate and detailed report if you can provide this monthly information).

Your Details

Please enter your name and e-mail address carefully.  Your free report will be sent to the e-mail address you enter below:

Your name:                    
Your e-mail address:      


PRIVACY STATEMENT: Your e-mail address is not stored on our system - after sending you your report, your name and e-mail address are removed from our system. You will not receive any unsolicited communications as a result of using this form.