Not yet. Missouri has no plug-in solar law.
Without a specific law, connecting any solar device to your home's wiring falls under your utility's interconnection rules, which usually require an application.
The 2026 session ended in May without passing a plug-in solar bill.
Portable solar generation devices
Introduced by Rep. Mark Matthiesen and read a second time on January 8, 2026. It would have exempted portable solar devices from Public Service Commission regulation. A similar bill, HB 2444, also did not advance.
With no plug-in solar statute, a grid-tied kit is treated like any other generator connected to your home. Utilities generally require an interconnection application before you connect anything that can push power into the wiring, and connecting without approval may violate your utility's terms of service. Plugging in a kit is not clearly legal or clearly illegal; it is unapproved.
Federal bill. Socket Full of Sunshine Act (H.R. 10851): Introduced in Congress on October 19, 2026 by Rep. Rob Menendez (D-N.J.). It would remove utility approval and fees for plug-in systems up to 1.2 kW nationwide, give state regulators two years to set a standard, bar landlords from blocking tenants with some exceptions, and fund state rebates of up to $1,000 for low- and middle-income households. It has not passed. Source.
Missouri's average residential price was 14.3¢ per kWh for January–August 2026, below the US average of 18.2¢ and up 7% from the same months of 2025 (EIA). That ranks 39 of 51 for price, so these are the savings you would see if the kit were allowed.
| 800 W kit, $700 | kWh per year | Savings per year | Payback |
|---|---|---|---|
| Hanging on a south-facing railing | 821 | $97 | 7.2 years |
| Hanging on an east- or west-facing railing | 640 | $84 | 8.4 years |
| Tilted 35° on a stand, facing south | 1232 | $127 | 5.5 years |
Assumes a 300 W always-on household load and 5.03 peak sun hours (NREL data for Missouri's largest city). How we calculate.
Not yet. Missouri has no plug-in solar law. Without a specific law, connecting any solar device to your home's wiring falls under your utility's interconnection rules, which usually require an application. Status checked October 29, 2026.
HB 2528: Introduced by Rep. Mark Matthiesen and read a second time on January 8, 2026. It would have exempted portable solar devices from Public Service Commission regulation. A similar bill, HB 2444, also did not advance.
Yes. Panels that charge a portable power station, with your devices plugged into the station rather than a wall outlet, are not connected to the grid and do not need utility approval. Grid-tied plug-in kits are a different matter until Missouri passes a law or your utility approves the connection.
At Missouri's average residential price of 14.3¢/kWh, an 800 W kit hanging on a south-facing railing would save about $97 a year in our model, paying back a $700 kit in about 7.2 years. East- or west-facing railings save about $84.
Found something out of date? Email hiruben@gmail.com. We log fixes on the corrections page. This page is general information, not legal advice.