India is writing the third solar playbook

The United States built its solar market by subsidizing demand. Tax credits and net metering made the economics work, financiers invented structures around them, and the hardware came from wherever it was cheapest. China built its solar industry the other way around: subsidize the factories, achieve scale nobody could match, and let the world’s demand absorb the output. Combined, those two playbooks took solar past three terawatts globally.

India is now running both playbooks at once, and adding a third tool neither country leaned on: mandates.

If your project touches public money: buy from the approved domestic list.

If you’re connecting commercial solar to the grid: add a battery first (two states so far, and counting).

And all of it serves one national target: 500 GW of non-fossil capacity by 2030.

The playbook is working. India will become the world’s second-largest solar market this year by annual installations. More than a quarter of all the solar it has ever built was installed in the last twelve months, and domestic factories are set to produce triple the country’s demand for solar cells within a year. Households are adopting fastest of all: every day in July, 16,000 of them put solar on their roofs, more than triple the pace of just nine months ago.

None of this happened purely because solar got cheap. Solar got cheap everywhere. It happened because Indian regulators decided to build a solar superpower and wrote the rules to do it, from the household rooftop down to the wafer. If you build, finance, or supply distributed energy anywhere in the world, this is the program to study, because its effects are going to travel.

The target: 500 GW of non-fossil capacity by 2030

Step one of the playbook is setting the goal, and India is already 60% of the way to its 2030 mark. The country crossed 300 GW in July, with solar making up 164 GW of that, and the past year’s additions alone matching the roughly 45 GW a year the target needs. But don’t forget the households. India’s rooftop solar program, PM Surya Ghar, crossed 5 million rooftops in August, barely two years after launch. The program combines a capital subsidy, a net-metering rule, and a financing rail, so a decision that used to take months of paperwork now happens in days. That is where the 16,000 installations a day come from. Nearly two million of those households now pay nothing for electricity and more than a million earned money last year selling power back.

The domestic list: buy Indian or lose the subsidy

I wrote about this previously: the ALMM, the Approved List of Models and Manufacturers, is a simple rule with long reach. If your project touches government programs or subsidies, you have to buy from the list of domestic suppliers. Modules were put on it in 2021. Cells followed this June, with an exemption for net-metering and open-access projects that expires December 31. Wafers and ingots are next; the government is already targeting 80 GW of wafer capacity by mid-2028.

None of this is free in the short run. A fully domestic module runs roughly ₹23–26 per watt, nearly double the imported alternative, per IEEFA, and cell capacity, at 32 GW, is a fraction of the roughly 200 GW of module capacity it has to feed. Projects will pay a premium while that gap closes. But the general consensus is that the premium will be short-lived. After the module rule took full effect in 2024, it took less than two years for Indian manufacturing to overshoot domestic demand. Cells are expected to do the same within this financial year, and for once the government and the market agree: the MNRE projects 100 GW of cell capacity within a year, against annual demand of about 50 GW.

The battery rule: add storage to stay connected

The newest mandate reaches past panels to batteries. Two states have moved first. Maharashtra requires any new commercial solar system above 100 kW to include a battery sized at half the solar capacity, for two hours. Kerala requires storage of at least 30% of system capacity on rooftop systems above 3 kW seeking net metering. These are really grid-protection rules, but they are also creating demand and helping stand up a new battery industry in the same way the ALMM ordered up a module industry. New Indian battery companies are multiplying to meet the mandated demand: the country added 4.6 GWh of battery storage in the first quarter alone, up more than ninefold from the quarter before. And the market around them is reorganizing too: at Odyssey we are watching a growing list of solar companies build their businesses around commercial customers, where the rules now make solar plus storage the default configuration rather than the premium one.

Playbooks travel

The target created the volume. The list is creating the industry. The battery rule is running the same play again for storage. Industries built behind trade walls outgrow them when the demand behind the wall is real, and Indian module capacity already exceeds domestic demand several times over. Cells are heading the same way. The US has closed its own door, with preliminary tariffs of up to 126% on Indian modules, so the surplus will go where demand grows and trade stays open. Analysts already expect Indian manufacturers to turn to Africa and other emerging markets as the American market shuts.

I’m biased; I spend my days on the financing and procurement side of this market. But that is where this lands. For anyone building or financing distributed energy in emerging markets, a second low-cost supply line means better prices, better terms, and less exposure to any one country’s politics. The US wrote the demand playbook. China wrote the supply playbook. India is writing the one where a government combines both at once, on purpose. The rest of the emerging world will be watching it closely.