As SolarCity expands, so too does the number of residential solar installations.

Why? The California-based company offers a 20-year, zero-down solar lease deal to homeowners. Translation: You pay a monthly fixed rate for using the solar photovoltaic (PV) system atop your house. That rate won’t fluctuate, like prices of conventional electricity. And even though that fee can vary depending on your region, SolarCity claims the savings you’ll see the very first month you use the system will exceed your payment.

The program is already in play in California, Arizona, Texas, Colorado and, most recently Oregon. Now the company has announced plans to expand eastward.

Beginning in February, SolarCity will offer its solar lease in Maryland, where the state’s energy administration is giving homeowners grants of up to $10,000 at a rate of $0.50/watt (W) to help with the cost of installing a solar PV system.

To boost solar power in Maryland, SolarCity has acquired the solar energy installation branch of Clean Currents — an independent solar energy company with an office in the Baltimore area. Soon thereafter, the company plans to venture into the Washington, D.C. market. It’s all an extension of SolarCity CEO Lyndon Rive’s belief that people anywhere will install solar, “as long as it won’t cost them an arm and a leg.”

So far, there’s really no reason for SolarCity to believe otherwise. A total of 1,500 communities have bought in to the program so far. We’ll keep an eye on how things shape up on the east coast.