Balcony solar in California
Signed Sept 30, 2026, takes effect Jan 1, 2027. California’s law is SB 868, the Plug and Play Solar Act. An 800 W kit on a south-facing railing saves about $207 a year here and pays for itself in about 3.4 years.
Last checked October 6, 2026
What California’s law says
- Governor Gavin Newsom signed it on September 30, 2026. California is the 10th state with a plug-in solar law.
- Systems can put out up to 1,200 W per home and connect through a standard 120-volt outlet.
- Kits must be certified by UL or an equivalent lab, meet national and California electrical codes, and shut off within seconds of a grid outage.
- Qualifying kits don’t need an interconnection agreement or the utility’s permission.
- The exemption ends on January 1, 2030, unless lawmakers extend it.
- The law says nothing about metering, credits or payment for extra power.
What that means right now
Until January 1, 2027 the old rules apply: plugging in a kit means going through your utility’s normal process. No kit on the market yet meets every requirement in the bill, and the author’s office expects compliant products in stores by spring 2027.
If you rent or have an HOA
The law doesn’t create a right to install over your landlord’s or HOA’s objection. Ask before you mount anything. Renters guide.
What a kit saves in California
Estimates at California’s average power price (33.4¢/kWh), 250 W of always-on use at home, extra power counted as $0.
| Setup | Makes per year | Saves per year | Paid back in |
|---|---|---|---|
| 800 W, south-facing railing ($700) | 803 kWh | $207 | 3.4 yrs |
| 800 W, east or west railing ($700) | 647 kWh | $169 | 4.1 yrs |
| 800 W, south, tilted stand ($700) | 1,278 kWh | $251 | 2.8 yrs |
| 1,200 W, south-facing railing ($1,000) | 1,205 kWh | $238 | 4.2 yrs |
Month by month (800 W, south railing)
A panel hanging straight up does best when the sun is low, so winter months hold up better than you’d expect.
California has some of the highest power prices in the country, so a kit pays back faster here than almost anywhere. Many customers of PG&E, SCE and SDG&E are on time-of-use rates with the highest prices in the late afternoon and evening, which makes a west-facing balcony worth more than the yearly kWh suggest.
Calculate for my home in California
Before you buy
- Confirm the law applies on the date you want to plug in.
- Buy a kit certified to the standard the law requires. UL 3700 explained.
- Stay within the size limit.
- Get your landlord’s or HOA’s OK in writing.
- Check your spot: direction, shade, and a solid railing or stand.
California: common questions
Is balcony solar legal in California?
Signed Sept 30, 2026, takes effect Jan 1, 2027. The law is SB 868, the Plug and Play Solar Act. Until it takes effect, your utility's normal rules apply.
How much can balcony solar save in California?
About $207 a year for an 800 W kit on a south-facing railing, at California's average power price of 33.4¢ per kWh. On a tilted stand facing south, about $251.
How long does it take to pay back in California?
About 3.4 years for a $700 kit on a south-facing railing, before power prices rise. Rising prices shorten that.
How many sun hours does California get?
About 5.3 peak sun hours a day on average across the year, at a typical location in the state.
Can my landlord or HOA stop me in California?
The law doesn’t create a right to install over your landlord’s or HOA’s objection. Ask before you mount anything.
Sources
- pv magazine USA, Newsom signs California plug-in solar bill, October 1, 2026.
- Solar.com, California Legalizes Plug-In Solar: Newsom Signs SB 868.
- NRG Clean Power, What SB 868 changes for your power bill (UL 3700 and the Hoymiles HiFlow Pro).
- Electricity prices: U.S. Energy Information Administration, Electric Power Monthly, Table 5.6.A (March 2026 data).
- Production and savings: our calculation method.