Most People Still People Use the Wrong Solar ROI Formula
They assume:
Payback = system cost ÷ monthly bill savings
But that ignores how electricity pricing actually works today.
A more realistic view looks like this:
- Utility rates in the U.S. average ~17¢/kWh and keep rising ~3–5% annually
- Every rate increase improves your solar savings over time
- Adding battery storage increases value by reducing peak-hour grid usage
So ROI isn’t static anymore; it improves as utility prices go up.
In other words: solar isn’t just about cutting today’s bill; it’s about locking in future energy costs.