Calculate the payback of adding a battery to an existing system
With the new STC battery rebate in Australia, adding a battery to an existing solar system can make a lot of sense.
Now, using Photonik design tool, you can model the savings and payback period of adding batteries to an existing system.
Adding a battery can save you nearly $1000 a year and make you 86% self sufficient
The results are quite surprising. The ROI for adding a battery to a system is comparable to adding solar panels. This is a dramatic change from a few years ago when battery prices were higher, and even from before the battery STC rebate, which has made a huge difference in the financial viability of a home battery.
Below is an example of a project in NSW (STC zone 3).
Adding: 9.6kWh battery to an
Existing: 6.8kW solar system
The payback is just over 4 years. Until recently the payback of adding a battery was longer than the expected life of the battery itself. Without the STC rebate, the payback would be twice as high.
Check out the feature, and lets us know what you think.
Marty