Michigan Plug-In Solar Laws

The 1,200 W figure is not classified

HB 5764 uses maximum power output of not more than 1,200 W. It does not say whether that means panel DC nameplate capacity, continuous inverter AC output, apparent power or export at the meter. Those measurements can differ. A panel bundle advertised as 1,200 W DC may use a smaller inverter, while several inverter channels can change the aggregate AC value.

The notice clause uses a second measurement: inverter capacity. The definition still uses the broader maximum-power wording. Record both fields rather than treating them as identical. An amendment, final act or MPSC implementation could define the threshold differently from the introduced text.

Michigan's current utility route still applies

MPSC guidance says customers must properly interconnect distributed generation before operation. For a project designed to run in parallel with the distribution system, the approved utility procedure covers the application, technical review, agreement and other required steps. The Michigan Interconnection and Distributed Generation Standards took effect on April 25, 2023. Each covered utility implements them through its own approved procedure.

The serving provider determines which procedure applies. MPSC interconnection jurisdiction covers rate-regulated utilities and electric cooperatives, while municipal electric utilities use their own processes. Consumers Energy, for example, directs solar and other generation customers to its Generator Interconnection program. Forms, fees and meter steps can differ at another provider.

A small inverter does not itself create a socket exemption under the current framework. Identify the serving provider first, describe the complete grid-parallel configuration and obtain its current written instructions. Do not use HB 5764's proposed post-installation notice as a substitute for today's approval route.

The certification clause does not name UL 3700

The certification requirement sits inside the bill's definition of a qualifying plug-in photovoltaic system. It calls for certification by Underwriters Laboratories or an equivalent nationally recognized testing laboratory, but names no numbered test standard. A mark on one inverter therefore does not show by itself that the panel, inverter, cable, plug, controls and instructions satisfy every condition. HB 5764 does not name UL 3700, UL 1741 or IEEE 1547.

OSHA recognizes an NRTL for specific products and test standards within a defined scope. Check the laboratory's public directory for the exact model, evaluated configuration, named standard and conditions of use. A generic UL or ETL badge is not enough to establish what was certified or whether the evidence matches the bill's system definition.

UL Solutions describes UL 3700 as the Outline of Investigation for Interactive Plug-In PV Equipment and Systems. Its safety work addresses risks such as conductor overload, GFCI compatibility, energized attachment plugs and user-accessible inverter output circuits. HB 5764 does not reference that outline. Do not rewrite the bill as a UL 3700 mandate unless later official text adds it.

• Match the exact model and every included component to the certification record.
• Record the named test standard and confirm it is within the laboratory's recognized scope.
• Separate inverter evidence from evidence for the complete plug-in system.
• Verify the permitted outlet, circuit, protection and outage behavior for the exact configuration.

The outage clause does not create backup power

HB 5764 requires a feature that prevents the device from energizing the building's electrical system during a power outage. This is a shutdown requirement. It does not authorize an ordinary grid-parallel plug-in system to run as home backup. A battery or transfer arrangement would be a different configuration with its own equipment, circuit and approval questions.

The introduced text does not specify a shutdown time, test method or named anti-islanding standard. Current utility technical requirements and the exact product record remain the controlling evidence today. If the bill advances, later amendments or commission implementation may add details that are absent from the introduced version.

Electrical permits and property permission need separate answers

Michigan LARA says electrical work that equips a building or alters, changes or adds conductors or equipment generally requires a permit from the appropriate enforcing agency. A plug-in configuration may involve less work than a new circuit. Replacing a receptacle, adding a circuit or changing premises wiring can still trigger the permit question. Ask the state or local electrical authority about the exact system instead of drawing a conclusion from the plug-in label.

HB 5764 includes a narrow property duty. If a customer installs on a meter or service panel the customer does not own, the customer must protect the structure's integrity and restore it when the system is removed. The bill does not expressly grant permission to attach panels to a rented balcony, railing, facade or common area. Obtain a written decision for the exact mount, support, cable route, outlet and removal plan.

The bill creates no express export credit

The proposed definition says the system is intended primarily to offset part of the customer's electricity consumption. It does not promise payment or bill credit for surplus energy. The 30-day notice would report inverter capacity, but the text does not specify how a meter must record reverse flow or how a provider must value it.

Under the current route, meter and tariff treatment remain provider-specific. Model savings from electricity used in the home while the system produces unless the serving provider documents a different credit in writing. An exemption from interconnection or distributed-generation program requirements would not automatically create compensation for export.