690.4 PV general rules
What changed in 690.4
The list of PV equipment that must be listed or field labeled grew, and electronic power converters are allowed where they aren't readily accessible.
Point by point
- The list of PV equipment that must be listed or field labeled for PV use got longer.
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- 3 more points on exactly what changed
- The 2017 rule next to the 2020 rule, side by side
- Why it changed
- What to do and check on the job
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This section across NEC® editions
2020 NEC®RevisedYou're here
The list of PV equipment that must be listed or field labeled grew, and electronic power converters are allowed where they aren't readily accessible.
2023 NEC®Revised
New 690.4(G) covers floating PV arrays on ponds, lakes and other water: equipment must be identified for that use and wired to handle movement.
Open the 2023 page →2026 NEC®Revised
New 690.4(G) settles PV math: round the final volt or amp result to the nearest whole number, dropping fractions under 0.5.
Open the 2026 page →More 2020 changes in Article 690
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