SAO PAULO, Feb 9 (Reuters) - The subsidy for renewable energy sources in Brazil will surpass that of the fossil fuel bill for thermoelectric plants by 2024, potentially increasing taxpayers electricity bill, electricity industry regulator Aneel said on Friday.

The discounts that wind and solar projects receive for using the transmission and distribution systems will reach 11.5 billion reais ($2.32 billion) this year, according to Aneel general-director Sandoval Feitosa.

That is above the 10.7 billion reais ($2.15 billion) budgeted for the so-called "CCC", a government fund that subsidizes the fossil fuels used to generate energy in Brazil's isolated areas, not connected to the country's grid, usually located in the North region and that rely on local generation from more expensive and polluting sources.

Both the CCC fund and the subsidies for renewable sources are paid by taxpayers through the Energy Development Account (CDE), a tariff charge on Brazilians' electricity bill

This trend should continue for the next few years, as renewables continue on a path of strong expansion, while the CCC tends to progressively decrease as more isolated areas are connected to the country's grid.

"Between 2022 and 2023, Aneel approved 142 gigawatts of solar and wind power plants, practically all of which are entitled to discounts, as long as they actually start operating," Feitosa said.

Incentives for wind and solar energy were established to make these energy sources more competitive and allow them to be integrated into the Brazilian energy system. Much of the market says that these sources no longer need the subsidy, so much so that a law was passed in 2021 to extinguish it.

However, subsidies are still likely to grow, given that more renewable projects were granted it during the transition period of the law.

On the other hand, the growth in the energy generated by renewable sources would ensure a greater supply, contributing to lower prices.

($1 = 4.9665 reais) (Reporting by Letícia Fucuchima; writing by Steven Grattan; Editing by Aurora Ellis)