PLUGWATTS FIELD GUIDE · MARYLAND FIRST
Is plug-in solar legal?
There is no single nationwide yes-or-no answer. State law, utility rules, electrical requirements, equipment certification, and property permission can each affect a project.
Last reviewed September 14, 2026 · PlugWatts editorial
Start with primary authority
Use current legislation, a state regulator, and the serving utility as the source chain. A retailer, forum post, or old article may identify a question but should not establish the answer.
Legal does not mean suitable
A state pathway does not establish that a particular product, outlet, circuit, mount, balcony, lease, or meter is appropriate. Those conditions require separate evidence.
Coverage begins with Maryland
PlugWatts currently provides a Maryland decision path because the regulator has published concrete requirements and utility routes. Other states should be added only after their source records can be maintained.
Questions to send your utility
Describe the proposed system and maximum output, then ask which portable-solar rules apply, what notification or interconnection process is required, and how your meter records exports. Keep the answer with the equipment documents. An unsupported state in our Check means we have not verified that state; it is not a finding that plug-in solar is prohibited.
Use the process for your actual project
The Maryland guide addresses qualifying residential portable systems. A larger installation, a second system on the same meter, or a commercial project needs a different assessment. Do not scale up a small-system exemption based on a retailer’s bundle name.