# Indian solar plant will switch to fuel when sunlight fades

- URL: https://talkfuse.com/story/turning-a-solar-power-system-into-its-own-backup/
- Published: 2026-10-29T18:02:26+00:00
- Updated: 2026-10-29T18:47:31+00:00
- Original publisher: Ars Technica
- Original article: https://arstechnica.com/science/2026/10/turning-a-solar-power-system-into-its-own-backup/
- Topics: Geopolitics, Politics

## Key points

- 247Solar’s system can use fuel when solar power falls short.
- It shares generating equipment between solar and backup operation.
- The planned Indian plant will produce 1 megawatt.

## Summary

US startup 247Solar is developing a concentrated solar power plant in India that can switch to burning fuel when sunlight is insufficient. By using the same equipment for solar generation and backup, the company aims to avoid building a separate facility to cover renewable shortfalls.

The planned plant is small, at 1 megawatt, and will also include photovoltaic panels. Mirrors will focus sunlight to heat air to about 970°C; the heat can serve industrial processes or generate electricity, and may be stored in ceramic pellets. The system is designed to burn a range of fuels during prolonged cloudy periods or other low-solar conditions.

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Summarised by TalkFuse (https://talkfuse.com/). Quote the original publisher for the reporting and link this page for the summary and discussion.