California passed a law that eases installation of small “plug-in” solar kits. This is not a tens-of-thousands roof, but one to three panels with a microinverter that a tenant hangs on a balcony and plugs into the wall.
How it works
A normal roof pushes current through the panel board and can send surplus to the grid. A balcony kit stays inside the flat: the inverter pushes current into other sockets. Utah Clean Energy estimates a typical install covers 10–30% of home use. In Europe the format is already household: Germany installed more than a million units in a few years, and IKEA sells kits.
Utah legalised it first in spring 2025. Then came Colorado, Connecticut, Maine, Maryland, New Hampshire, New Jersey, Vermont, Virginia and now California. In New York the bill awaits the governor’s signature; drafts sit in another twenty states. Engineer Joshua Pearce ten years ago put national savings at $13 billion a year — at today’s tariffs the figure is higher.
Where the catch is
Utilities feared current would leak onto the line and hit a linesman. Pearce writes: household microinverters in the US cannot do that. UL already issued a standard and certified a first maker. British tests in 2026 found no direct danger, though some devices were slow to trip protection. A fire from old wiring in Europe at mass scale has not been recorded.
Physics is not the blocker, the yard is: even in a legal state, zoning can ban panels on the front façade. In Colorado one resident bought a panel without markup for about $300, first tripped a breaker, swapped the inverter and recouped the cost on the bill in a couple of months.
How to look at it
This is an entry into sun for people who do not own a roof. It is not a heat-pump replacement and not “a house off grid”. It makes sense if the balcony faces roughly south, the tariff is high, and the building will not forbid the mount. In Russia the format is still rare: without clear rules and a certified “plug into the wall” it is a hobby, not a product.
