Before we talk about panels
If your bill is above R$ 400, the problem isn’t your consumption.
In October 2025, Neoenergia’s residential rate rose 11.65% (ANEEL Ratifying Resolution No. 3,542/2025). And under Law 14,300, anyone who generates their own energy pays a growing share of the grid fee starting from the day they join, rising every year. In 2026 that share stands at 60%, and it rises again on January 1st. It’s written into law, it’s an annual step, and it doesn’t reverse:
- 202545%past
- 202660%now
- 202775%Jan 1
- 202890%
- 2029100%
Percentage of the TUSD Fio B fee charged on offset energy — Law 14,300/2022, Art. 27. In 2029 it becomes full.
These are percentage points of the Fio B fee, which is one part of the rate — not percentage points of your savings. The effect on your bill is smaller than the number suggests, and that’s exactly what we calculate for your case.
Installing today doesn’t freeze anything — no serious company will promise you that. The grandfathered right under Art. 26 applied to those who filed for grid access by 01/07/2023.