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Plug-in solar in Illinois

Not yet — Illinois'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
19.22¢/kWh (+5% vs US)

800 W kit · typical year

$162saved

Payback ≈ 5.5 yrs · ranks #20 of 51 for savings

Illinois 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 Illinois, and your utility may treat it as an unauthorized interconnection.

What plug-in solar is worth in Illinois

Illinois households pay an average of 19.22¢ per kWh, 5% above the US average of 18.31¢. With roughly 4.2 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
$162
Payback ($900 kit)
5.5 yr
Energy used
844 kWh/yr
25-year net
$3,154

1,200 W kit (max)

Saved per year
$243
Payback ($1,300 kit)
5.3 yr
Energy used
1,266 kWh/yr
25-year net
$4,781

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 · Illinois

$162/ year

≈ $13.51 per month

Payback
5.5 yrs
Energy used
844 kWh/yr
25-year net
$3,154
CO₂ avoided
683 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 Illinois state legislators: constituent support is what moved the 2026 bills.

Illinois plug-in solar FAQ

Is plug-in solar legal in Illinois?

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 Illinois?

At Illinois's average residential rate of 19.22¢/kWh (EIA, July 2026) and about 4.2 peak sun hours a day, a south-facing, tilted 800 W kit saves roughly $162 a year, paying back a $900 kit in about 5.5 years. Vertical railing mounts produce about 30% less.

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

There is no Illinois-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 Illinois sources and your utility.