A solar biscuit (also known as digital solar) is a small, fractional unit of a remotely hosted solar power plant sold online through platforms like SundayGrids. It allows consumers to buy a piece of a solar panel off-site and receive energy credits or power dividends to lower their monthly electricity bills without installing physical rooftop panels.
Fractional Ownership: Each biscuit represents a tiny, measurable share of a shared solar energy installation(Solar Farm Project).
Bill Offsets: The electricity generated by your owned biscuits turns into power credits that deduct utility costs from your home or business bill.
No Maintenance: Perfect for renters, shaded buildings, or apartments with limited roof space since the central provider handles hardware upkeep.
Fractional solar investment is one of the fastest-growing segments of alternative energy investing, yet most US investors have never heard of it. Unlike buying shares of a solar ETF or a publicly traded utility, fractional solar ownership gives you a direct stake in real, operating solar projects — with monthly cash distributions tied to actual electricity sales.
Fractional solar investment is a model where multiple investors collectively own shares of a commercial or utility-scale solar power project. Instead of one entity funding an entire solar installation, the project is divided into smaller ownership units that individual investors can purchase.
Each investor's share entitles them to a proportional slice of the project's revenue — typically generated through long-term electricity sales contracts known as Power Purchase Agreements (PPAs). The result is a real asset, producing real energy, generating real revenue, distributed monthly to investors.
This is fundamentally different from buying a solar stock or ETF. When you buy shares of, say, a renewable energy ETF, you own a financial instrument whose price is driven by market sentiment, earnings forecasts, and broader equity market movements. Fractional solar ownership, by contrast, is tied to the physical output of a solar plant. Your returns come from kilowatt-hours sold, not stock price appreciation.
The model has existed in various forms — community solar, solar cooperatives, crowdfunded solar — but the version gaining traction with US accredited investors involves structured ownership through SEC-registered private offerings, where investors purchase membership interests in a legal entity that owns the solar assets.
Fractional solar projects targeting US accredited investors typically offer an expected XIRR (Extended Internal Rate of Return) in the range of 10–14%, with monthly cash distributions in USD.
These returns are driven by several factors. The PPA tariff — the price at which the solar project sells electricity to its buyer — is the single biggest driver. Indian commercial and industrial electricity rates are significantly higher than solar generation costs, which creates a healthy margin. The Capacity Utilization Factor (CUF) determines how much energy the plant actually produces relative to its theoretical maximum, and Indian solar irradiance levels (4–7 kWh per square meter per day across most of the country) are among the highest globally. Operations and maintenance (O&M) costs, insurance, and platform management fees are deducted before distributions reach investors.