Sustainable Energy Systems LLC s a renewable energy design and installation business operating in the mid-atlantic region. Our office is in Frederick, MD. We focus on photovoltaic systems (grid tied, battery backup, off-grid) and solar water heating systems. We offer leases or power purchase agreements for residential and commercial grid tied photovoltaic systems as well as sales.

The solar industry has learned how to overcome the obstacle of the upfront cost of solar energy systems. For too long, people who want to use clean, free energy can't because of the high cost of materials to produce it. With the Solar Lease, you can get a solar system on your house or in your yard, use the power for LESS than the cost you are currently paying, with NO MONEY UPFRONT.  We offer 20 year leases for residential grid-tied photovoltaic systems with the option of $0.00 down payment. You can start saving money and using clean energy from day one! Or you can prepay a lease, have no monthly payments and start using solar energy for a fraction of the cost of owning the system. We will take care of any maintenance at no cost and guarantee monthly energy production.Little or no upfront cost means little or no waiting for your solar lease investment to pay for itself. You will continue to get a bill from your electricity company. It will be much smaller. You will also get a bill from Sungevity. Pretty soon your reduced electric bill plus your bill from Sungevity will be lower than your previous bill. In fact many customers save right from day 1 -- but everyone saves thousands in the long run and ensures a comfortable future safe from energy rate rises. Solar heating is the most efficient form of solar energy. A solar water heating system can save 30 to 50% of the typical home's energy costs and reduce carbon emissions by at least 6,600 lbs of CO2 per year. A solar water heating system is basically comprised of a storage tank, solar collector(s), insulated copper pipes, a heat exchanger, and a pump.