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State law · Missouri

Is plug-in solar legal in Missouri?

No — Missouri had no plug-in solar law on October 14, 2026; two bills (HB 2528 and HB 2444) were deferred to the 2027 session. The proposals would set a 1,200 W cap and require UL or equivalent certification.

Where the bill stands
  1. Bill introducedHB 2528 / HB 2444
  2. Passed the legislaturecarried to 2027
  3. Signednot yet
  4. In effectnot yet
Deferred to 2027

Missouri

HB 2528 / HB 2444 was deferred to the 2027 session; there is no state plug-in solar law yet.

Bill
HB 2528 / HB 2444
Size limit in the bill
1,200 W (the bill does not say AC or DC)
Utility notice, in the bill
Would not be required
Certification in the bill
Underwriters Laboratories or an equivalent nationally recognized testing laboratory (whole system)
Paid for exports, in the bill
The bill does not say
Utility fees, in the bill
Would be banned

Checked October 14, 2026

Other states

MEWIVTNHWAIDMTNDMNILMINYMAORNVWYSDIAINOHPANJCTRICAUTCONEMOKYWVVAMDDEAZNMKSARTNNCSCDCOKLAMSALGAHIAKTXFL
A typical year in Missouri800 W kit · railing, facing south · near the state's population center
Service ZIP650xxMissouri
740 kWhproduced in a typical year
$60saved per year
13.96¢/kWhAverage home rate, EIA

432 kWh used at home × 13.96¢ = $60.31; 308 kWh sent to the grid unpaid, 0 kWh lost to the inverter limit. At Missouri's average rate (EIA).

Missouri: Back in 2027HB 2528 / HB 2444 was deferred to the 2027 session; there is no state plug-in solar law yet.
Bill
HB 2528 / HB 2444
Proposed
1,200 W

Production by month, kWh

0255075100kWhJanFebMarAprMayJunJulAugSepOctNovDec
  • Used at home
  • Sent to the grid

Residential average, January to July 2026 (EIA Electric Power Monthly).

Open the calculator

What the law says now

On October 14, 2026 Missouri had not enacted plug-in solar legislation; both HB 2528 and HB 2444 were deferred to the 2027 session, according to the Missouri legislature record and the Bright Saver tracker.

Those bills are proposals, not law. The draft text specifies a maximum power output of 1,200 W and says systems must be designed to connect to a standard 120-volt AC outlet, meet the most recent National Electrical Code and be certified by Underwriters Laboratories or an equivalent nationally recognized testing laboratory.

  • Maximum power output: 1,200 W (the bill text does not say whether this is AC or DC output).
  • Designed to plug into a standard 120-volt AC outlet.
  • Must meet the most recent National Electrical Code and be UL-listed or equivalent.
  • Must include a feature that prevents energizing the building during a power outage (anti-islanding).
  • Retail electric suppliers could not require approval or charge fees related to the system under the bill text.

Options without a law

Because the bills are not law on October 14, 2026, the proposed rules are not binding. If you want a system that needs no utility interconnection, a portable power station charged by solar panels is an option; manufacturers list capacities and AC outputs for models intended for home use.

Homeowners who can install a roof-mounted system should get local quotes for a grid-tied system that meets code. If you are estimating production for a small plug-in kit, use the calculator for site-specific numbers.

  • Calculator: an 800 W kit, vertical south, produces 740 kWh/year; 432 kWh (58%) is used at home and the home-used power is worth $60/year at 13.96 cents/kWh (the calculator gives these numbers).
  • Calculator: the same 800 W kit tilted at 30° produces 1,118 kWh/year and saves $72 (the calculator gives this).
  • Calculator: a 1,200 W kit, vertical south, produces 1,110 kWh/year and saves $67 (the calculator gives this).

Questions

Is plug-in solar legal in Missouri right now?

No. On October 14, 2026 both HB 2528 and HB 2444 had been deferred to the 2027 session and no plug-in solar law was in effect (Missouri legislature; Bright Saver tracker).

Would the bills force me to notify my utility?

The bill text would prohibit retail electric suppliers from requiring a customer to obtain approval before installing or using a portable solar generation device, and would ban fees related to the system.

Do the proposals require product certification?

Yes. The draft text would require systems to be certified by Underwriters Laboratories or an equivalent nationally recognized testing laboratory and to meet the National Electrical Code.

What if I don't want to connect to the grid?

A portable power station charged by panels does not require utility interconnection. Manufacturers list model capacities and AC outputs (for example, EcoFlow DELTA variants) in their specifications.