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Plug-in solar in Missouri

Not yet — Missouri's bill stalled in 2026

  • A plug-in solar bill was introduced in 2026 but stalled
  • Reintroduction expected in the 2027 session

Last verified

Status
Bill stalled
Bill
—
Signed
—
Effective
—
Size cap
—
Avg. electricity rate
16.09¢/kWh (-12% vs US)

800 W kit · typical year

$145saved

Payback ≈ 6.2 yrs · ranks #34 of 51 for savings

Missouri lawmakers introduced plug-in solar legislation in 2026, but it stalled before final passage. Bill trackers expect it to be reintroduced in 2027.

Until a law passes, plugging a generating device into home wiring isn't covered by a specific legal framework in Missouri, and your utility may treat it as an unauthorized interconnection.

What plug-in solar is worth in Missouri

Missouri households pay an average of 16.09¢ per kWh, 12% below the US average of 18.31¢. With roughly 4.5 peak sun hours a day, here is what a well-placed system produces and saves. We assume panels facing south at about 30°, 86% system efficiency and 80% of output used on-site.

800 W kit (2 panels)

Saved per year
$145
Payback ($900 kit)
6.2 yr
Energy used
904 kWh/yr
25-year net
$2,736

1,200 W kit (max)

Saved per year
$218
Payback ($1,300 kit)
6.0 yr
Energy used
1,356 kWh/yr
25-year net
$4,155

Run your own numbers

Change the orientation, mounting and size to match your balcony.

800 W
80%

Plug-in systems aren't net-metered: surplus sent to the grid earns nothing. ~80% is typical without a battery; 95%+ with one.

Estimated savings · Missouri

$145/ year

≈ $12.12 per month

Payback
6.2 yrs
Energy used
904 kWh/yr
25-year net
$2,736
CO₂ avoided
732 lb/yr

Monthly savings profile

Estimates only. Rate: EIA July 2026 state average; sun hours: long-term averages. See our methodology.

What to do now

  1. 1Don't connect a grid-tied plug-in system yet — without a law, it may breach your utility agreement.
  2. 2Consider an off-grid setup in the meantime: a panel charging a portable power station is legal everywhere.
  3. 3Cut your bill today with no-cost measures — see our guide to lowering your electric bill.
  4. 4Contact your Missouri state legislators: constituent support is what moved the 2026 bills.

Missouri plug-in solar FAQ

Is plug-in solar legal in Missouri?

Not yet. A bill was introduced but stalled this session. Expect it back. Without a law, connecting a grid-tied plug-in system may violate your utility's interconnection rules. Off-grid setups (a panel charging a portable power station) are allowed everywhere.

How much can balcony solar save in Missouri?

At Missouri's average residential rate of 16.09¢/kWh (EIA, July 2026) and about 4.5 peak sun hours a day, a south-facing, tilted 800 W kit saves roughly $145 a year, paying back a $900 kit in about 6.2 years. Vertical railing mounts produce about 30% less.

What is the maximum plug-in solar size in Missouri?

There is no Missouri-specific cap yet. Most state laws settle on 1,200 W, the practical limit for a standard 15-amp, 120 V circuit.

Sources

Not legal advice. Laws and effective dates can change; confirm with official Missouri sources and your utility.