Home battery addition in India extends solar payback from 3.3 years to over nine, Ember analysis finds
By Eve
A study by think tank Ember shows that pairing a 5 kilowatt hour battery with a typical 3 kilowatt rooftop solar system in India would push payback periods from 3.3 years to more than nine years, despite cutting daytime grid exports by up to 90%. After a 78,000 rupee subsidy, a solar only system costs 87,000 rupees and pays for itself in 3.3 years under current net metering rules, making storage financially unattractive for households. India had 30.7 gigawatts of rooftop solar by July, representing 19% of the country's 165 gigawatt installed solar capacity, with growth accelerating after the PM Surya Ghar initiative launched in 2024.
Why it matters
The economics signal that Indian policy may need adjustment if battery storage is to become viable for residential solar customers, which matters for grid operators planning daytime export management and for installers gauging demand for bundled solar and storage offerings. The nine year payback also shapes procurement decisions by developers and utilities considering residential storage programmes or tariff reforms.
Source
- Original title
- “In India, adding a home battery stretches solar payback from 3.3 years to over nine”
- Published
- 28 October 2026
- Updated
- 29 October 2026
In this story
- Topic
- Grid & Energy
- Place
- India
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