Balcony Solar in Utah
Utah was the first US state to carve out plug-in solar. HB 340 lets you run a 'portable solar generation device' up to 1,200 watts with no utility approval, no fees, and no interconnection agreement — as long as it's certified by a testing lab and meets the National Electrical Code.
Reviewed August 6, 2026 against primary sources. Laws change — the sources below let you re-check.
Does Utah require UL 3700?
No — the statute does not name UL 3700.
(d) meets the standards of the most recent version of the National Electrical Code; and (e) is certified by Underwriters Laboratories or an equivalent nationally recognized testing laboratory.
Requires certification by an organization (UL or an equivalent NRTL), not to the UL 3700 standard. A UL 1741-listed inverter satisfies (e) on its face. Requirement (d) is unresolved: UL's own regulatory engineer says the 2026 NEC does not recognize plug-in PV.
Why this matters: “certified by UL” names an organization; “certified to UL 3700” names a plug-in-PV standard. They are not the same claim. Full explainer →
What the law does
- Must include a feature that prevents the system from energizing the building's wiring during a power outage (anti-islanding).
- Exempt from interconnection requirements, interconnection agreements, and net metering.
- Utility may not require approval, charge fees, or demand extra equipment; and is not liable for damage or injury caused by the device.
What's still unsettled
- The 1,200 W cap is not labeled AC or DC in the text.
- The cap is per device; nothing in the bill addresses owning two.
- Requirement (d) points to the NEC, which — per UL's own regulatory engineer — does not yet recognize that plug-in PV exists.
Before you buy in Utah
A state law opening the door is only one of three gates. The gear must actually be certified to what the law asks for — and today no plug-in kit sold in the US carries UL 3700 yet. Your utility may still want notification. If you rent, your lease or HOA is a separate yes. What "UL 3700 certified" really means →