The Deal

SolarSquare is close to locking in its biggest funding round yet.

According to TechCrunch, B Capital and Lightspeed Venture Partners are set to co-lead a Series C that would bring in $55 million to $60 million in fresh capital. Existing backer Elevation Capital is also expected to participate. The deal is in advanced stages and expected to close in June 2026 — but nothing is signed yet, and terms could still shift.

The implied valuation: $450 million to $500 million.

For context, Lightspeed led SolarSquare's Series B just 18 months ago — a $40 million round at roughly a $200 million post-money valuation, per TechCrunch. They're now back in through their growth fund, which has also backed Razorpay and Zepto.

Who Is SolarSquare?

Founded in 2015 and headquartered in Mumbai, SolarSquare is a full-stack residential solar platform. They design, install, and maintain rooftop solar systems for individual homes, housing societies (think apartment complexes and gated communities), and commercial clients.

They've installed more than 150 megawatts of solar capacity across 29 cities in nine states, according to the company's website. They've powered nearly 50,000 homes and around 400 housing societies, per a source cited by TechCrunch.

Enterprise clients include Swiggy, Zepto, and iD Fresh Food.

To date, SolarSquare has raised $61.1 million in equity financing, according to startup data platform Tracxn. The Series C — if it closes — would nearly double that total in a single shot.

The company started out in commercial solar, then pivoted to the residential market in 2020, per Mercom India. The 2022 Series A of $12.8 million — led by Elevation Capital and Lowercarbon Capital — was the first major external validation of that pivot. Now they're on the cusp of a half-billion-dollar valuation.

Why India, Why Now

India's solar story is legitimately staggering.

The country's cumulative installed solar capacity went from roughly 3 GW in 2014 to more than 150 GW in 2026, according to TechCrunch. India became the world's third-largest solar power producer in 2025, behind only China and the United States.

The government has set a target of 500 GW of renewable energy capacity by 2030, with solar expected to account for more than half. Subsidies and incentive schemes have helped push residential adoption forward.

The market SolarSquare is targeting remains highly fragmented. Local installers dominate. Dealer networks tied to component manufacturers — Tata Power, Waaree Energies, Luminous Power Technologies, Exide Industries — run the show in most cities. SolarSquare is betting that Indian homeowners will pay a premium for a single, accountable, tech-enabled provider instead of patching together hardware and service from four different vendors.

Their pitch on the company website is blunt: zero middlemen, installation plus subsidy paperwork all handled in-house, and a "savings guarantee" with a money-back promise. They claim to be India's only solar company making that specific guarantee.

Critical Questions

The subsidy dependency question. India's rooftop solar adoption has been heavily nudged by government incentives. SolarSquare's own website touts subsidy support as a selling point. What happens to unit economics if those programs get scaled back or delayed?

Market fragmentation cuts both ways. Yes, fragmentation is an opportunity for a platform player. It's also a sign that local operators are deeply entrenched and often cheaper. SolarSquare needs to demonstrate it can hold margin while competing against low-overhead local installers across 29 cities simultaneously.

Valuation math at $500 million. The company has powered 50,000 homes and installed 150 MW. That's real traction. But a $500 million valuation on $61 million in total capital raised — before this round — implies enormous future growth expectations baked in. If India's regulatory or subsidy environment shifts, that math gets uncomfortable fast.

What It Means

For Indian homeowners, SolarSquare's growth means more geographic reach, better service infrastructure, and real competition pushing the broader market toward accountability.

For investors, this is a bet that India's residential solar transition is just getting started — and that the company which cracks the fragmented installer market at scale wins something very large.

For the broader energy sector: when Lightspeed goes back in through its growth fund on a company it already backed at a much lower valuation, that signals conviction. Growth funds don't chase small outcomes.

The round isn't closed yet. Watch June.