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Click on a building or search for an address to get started:

2

Use the tools to customize:

Cover
Save
Invest
Design
3

Click the hard hat to

print your report and

explore next steps:

Solar Access

Configure!

Use the slider tool and configuration buttons to adjust your system to your needs.

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Cover
20 %
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Save
$ k
Save
Invest
$ k
Invest
CLOSE
DRAW
PICK
CLEAR
Design
of your total rooftop area
per month on your electricity bill
to make a return on your system
Next Steps
Drag the marker to your rooftop. Empty selection. Notice Please select a building first. Please zoom in to select a building.
Entering EDIT MODE. Use the slider to adjust your recommended system's size or the "Advanced Tools" to create your own.
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Solar Access Index

About this Initiative

The District of Columbia is one of the nation’s best solar markets, and powerful new solar feasibility and mapping technologies will help make the decision to go solar a lot easier.

With just a few clicks, the DC Solar Tool shows District of Columbia residents, businesses, and property owners how much electricity can be produced on their rooftops from solar photovoltaic (PV) systems, how the financial investment will pay off, and how much pollution will be reduced. Users can also find hundreds of systems already installed throughout the city. Growing the city’s solar energy capacity is key to Mayor Vincent C. Gray’s vision for a Sustainable DC, and helps us work toward our solar energy mandate of 2.5% by 2023.

When you go solar, you’re taking charge of your energy future, helping reduce greenhouse gas emissions, and making our community more resilient to the impacts of climate change. To promote solar deployment in the Nation’s Capital, the Government of the District of Columbia worked with Mapdwell to develop a comprehensive solar analysis tool.

Mapdwell developed the solar potential data delivered and visualized through Solar System as well as the complete cost/benefit analysis modules, while the District of Columbia provided the underlying input datasets, content, and imagery.

The District Department of the Environment (DDOE) will regularly update the tool to reflect changing market conditions and financial incentives. Please note that the PV market is very dynamic and some assumptions may at times not be entirely up-to-date.

DDOE’s Energy Administration assists the community in taking the next steps toward improving building efficiency and adopting renewable energy solutions. Please visit DDOE for more information on our energy initiatives. Visit the DC Public Service Commission to learn more about the District’s Solar Renewable Energy Credit program.

Tweet about your solar experiences @DDOE_DC

Resources

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Five Easy Steps to Going Solar in DC:

  1. Find your site potential using the DC Solar Tool
  2. Contact installers to get a free site assessment and quote
  3. Decide to own or lease the solar system
  4. Explore local bulk purchasing options
  5. Install and reap the benefits!

Area installers will help you select the best system(s), guide you through the application processes for incentives and SRECs, and answer any questions you may have about how best to proceed.

View DC’s Solar Roadmap to learn how the Government of the District of Columbia is working to transform DC’s solar market. This initiative is part of a larger US DOE SunShot-funded regional effort - Greater Washington’s Solar Energy Information Hub.

Additional resources are available from the District Department of the Environment. Contact DDOE to learn about our full range of energy-related programs that help District residents, businesses and property owners clean our air while growing our local economy.

  • Solar System considers rooftop shape, local weather, and shading from nearby structures and/or vegetation.

    Mapdwell’s M.I.T.-licensed technology yields highly accurate solar potential results.

  • You can configure your own system using Solar System's design tools. . .

    . . .or select a preset configuration based on roof coverage, desired monthly savings, or your investment plans.

  • Solar System presents your unique results in easy-to-understand metrics. . .

    Cost

    Investment

    Carbon

    Technical

  • Click the hard hat button to download your report and explore your options for going solar!

    By entering the site you agree to the Terms Of Use.

    ENTER

Use the Dashboard summary to get an idea of your system stats

Use the address search field to find an address

Keep an eye out for the notice symbol, in case your roof is in an historic or protected district

Try the slider tool to select areas of the roof, ordered by Solar Access Index. In Design Mode, 3 marks indicate the minimum, average and maximum Solar Access Index of the system.

Change the cost per watt if you know the unit cost of pv in your area

Choose a system tab to view detailed system information about your configuration

COST TO OWNER

YEARLY REVENUE

SYSTEM SIZE

PAYBACK PERIOD

CARBON OFFSET

TYPE AN ADDRESS

CUSTOMIZATION TOOLS

STATS PANEL

COST & REVENUE

INVESTMENT

TECHNICAL

ENVIRONMENTAL

COVER

SAVE

INVEST

DESIGN

Exit the design tools panel

Draw a shape on your roof where you want to install panels

Pick points to fine-tune the area of your roof for solar

Clear to start over

Return to world map to explore solar system's other locations

Choose a city from the city pulldown menu to go to a different map

Check out statistics for the entire Washington, DC area

The legend for the dots is based on solar access index

Move the opacity slider back and forth to see under the dots

Zoom in and out of the map

Explore existing systems in the Washington, DC area, or upload your own system onto the map

Click here for help with the interface

CITY NAME

STATS

MISSION

EXPLORE

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Save, print, or e-mail your custom system.

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