The payback period is 25+ years, help!

There are a few things that can help with the payback period. The payback period is a calculation done that plots the  you can either reduce costs or increase the benefits. 

• Navigate to the financial task, select the pen icon in the top right, under self-consumption, you can edit the import tariff (electricity costs for your customer). You can also specify the export tariff in this section for excess energy that is sold to the grid.  
  
• Adding batteries to the system might also be beneficial. This will increase the initial investment required but will allow the customer to store energy produced from peak times in the day to be used later. 
• If your system has a battery, you can estimate the benefits of off-peak charging and add this as an 'additional saving' in the financial task.