Maine’s new plug-in solar law, which takes effect in July 2026, allows the use of small, plug-in solar systems (sometimes called “balcony solar”) with an export capacity of 1,200 watts or less. These systems are designed to connect directly to a standard electrical outlet and help offset a portion of a home’s electricity use.
You can read Maine’s legislation, LD 1730, here.
Versant Power supports innovation and customer choice, but it’s crucial that customers understand key safety and compliance considerations before purchasing or installing plug-in solar. Improper installation or use may cause fire, shock or equipment damage.
You may install one or more eligible systems with a combined inverter output up to 420 watts per service address.
You may install plug-in photovoltaic or plug-in battery systems between 420 watts but no more than 1,200 watts as long as each system is installed by a licensed electrician, uses a dedicated circuit with a single outlet, and you notify Versant Power within 30 days of installation.
Safety and compliance come first
Plug-in solar systems must be installed and used in accordance with all applicable electrical codes and manufacturer requirements.
Before installing a system:
- Ensure the equipment is certified and approved for use in the U.S.
- Follow National Electrical Code (NEC) and State of Maine requirements.
- Consult a qualified electrician if you’re not sure about compatibility with your home’s electrical system.
- Avoid using damaged equipment or improper connections
Making a purchase
Ask the seller:
- Is this product UL-listed or certified for plug-in use?
- Does it comply with Maine and national electrical codes?
- What protections are included to prevent unsafe conditions?
- Has this product been approved for use by utilities in the U.S.?
Limitations of plug-In solar
Plug-in solar systems are not the same as rooftop solar and have important limitations:
- These systems are generally intended to reduce on-site electricity usage only.
- They are not designed to export power back to the electric grid.
- Customers using plug-in solar should not expect to receive bill credits or participate in Net Energy Billing
- System size and output are limited compared with professionally installed solar arrays.
Power quality & system impacts
Even small plug-in solar systems can affect your home’s electrical system.
- Potential considerations include:
- Circuit loading and wiring limitations
- Interaction with other devices on the same circuit
- Potential impacts to power quality if improperly installed
Customers are responsible for ensuring their system does not create unsafe or non-compliant conditions.
Versant Power’s role
- Versant Power does not install, inspect or approve plug-in solar systems.
- We require all customer-owned equipment to comply with applicable codes and safety standards
- If a system creates a safety hazard or affects electric service, Versant Power may take action, including disconnection of service if necessary to protect public safety.
- Customers who install systems between 420 and 1,200 watts must notify Versant Power.