Inverters and power control
The inverter is where the listing, the interconnection rule, and the utility tariff meet. Smart inverter requirements come from utility commissions, not the code.
How a product team uses this page
- Check the NEC edition for 705 and the listing it expects.
- Read the laws list for smart inverter and interconnection requirements.
- Watch the changes table for commission dockets that change the interconnection rule.
Codes that reach inverters and power control systems
The code, the part of it that governs the product, and the editions in force across the map. Section numbers move between editions, so the hub page names the one each state enforces.
| Code | Where it reaches the product | Editions in force |
|---|---|---|
| NEC | Article 705, interconnected power sources, with 690 and 706 for the source and the listing the inverter must carry | |
| IECC residential | Where a state adopts the solar-ready or storage-ready appendix, the space and the conduit the inverter needs |
Laws that name inverters and power control systems
19 laws, rules, orders, and bills in 9 states: 17 in force or enacted, 1 pending, 1 that did not pass.
The laws below were tagged by keyword from the battery law summaries in ten states. A research pass for inverters and power control systems in every state is planned.
- A law or rule in force9
- Nothing on file40
| State | In force | Pending | Did not pass | Topics | Last moved | |
|---|---|---|---|---|---|---|
| ArizonaAZ | 3 | – | 1 | Interconnection, Licensing, Meter adapters, Permitting, Tariffs | Sep 12, 2026 | The list |
| CaliforniaCA | 1 | – | – | Interconnection | Sep 8, 2017 | The list |
| FloridaFL | 2 | – | – | Fire and siting, Incentives, Permitting | Jul 1, 2026 | The list |
| MassachusettsMA | 2 | – | – | Interconnection | May 1, 2026 | The list |
| New YorkNY | 1 | – | – | Interconnection | Feb 9, 2026 | The list |
| OregonOR | 4 | – | – | Interconnection, Licensing, Tariffs | Jun 5, 2026 | The list |
| PennsylvaniaPA | 1 | – | – | Incentives, Interconnection | Jan 3, 2026 | The list |
| TexasTX | 2 | 1 | – | Interconnection, Meter adapters | Sep 1, 2025 | The list |
| WisconsinWI | 1 | – | – | End of life, Fire and siting, Permitting | Oct 1, 2025 | The list |
What changes next for inverters and power control systems
12 changes ahead: code moves that reach the product and laws not yet in force, soonest first.
| Date | State | What moves | Products | Stage | Checked |
|---|---|---|---|---|---|
| Florida | CodeFlorida moves six codes to new editionsNEC 2023, IBC 2024, IRC 2024, IFC (edition not named), IECC residential 2024, IECC commercial 2024NECIBCIRCIFCIECC Res.IECC Com. | All products | Proposed | Partial | |
| Washington | CodeWashington moves to the 2026 NECNEC 2026. Adoption order filed Nov 18, 2025 (rule order effective Dec 19, 2025) with a delayed 2026 NEC effective date; the 2023 NEC stays in force until then.NEC | All products | Adopted, not yet in force | Partial | |
| Alabama | CodeAlabama moves two codes to new editionsIRC (edition not named), IECC residential (edition not named)IRCIECC Res. | Residential ESSSolar PVInvertersInterconnect devicesEV charging | In development | Partial | |
| Louisiana | CodeLouisiana moves five codes to new editionsNEC 2023, IBC 2024, IRC 2024, IECC residential 2024, IECC commercial 2024NECIBCIRCIECC Res.IECC Com. | All products | Proposed | Partial | |
| South Carolina | CodeSouth Carolina moves four codes to new editionsNEC 2023, IBC 2024, IRC 2024, IFC 2024. Implementation date for local jurisdictions.NECIBCIRCIFC | All products | Adopted, not yet in force | Partial | |
| Washington | CodeWashington moves five codes to new editionsIBC 2024, IRC 2024, IFC 2024, IECC residential 2024, IECC commercial 2024IBCIRCIFCIECC Res.IECC Com. | Residential ESSCommercial and utility ESSSolar PVInvertersInterconnect devicesEV charging | Proposed | Partial | |
| Idaho | CodeIdaho moves four codes to new editionsIBC 2024, IRC 2024, IECC residential 2024, IECC commercial 2024. The Board’s 2026 rule to adopt the 2024 editions did not pass the House; the Board is discussing draft legislation that would adopt the 2024 codes in statute, effective Jul 1, 2028, if passed.IBCIRCIECC Res.IECC Com. | Residential ESSCommercial and utility ESSSolar PVInvertersInterconnect devicesEV charging | In development | Partial | |
| California | CodeCalifornia moves six codes to new editionsNEC 2026, IBC 2027, IRC 2027, IFC 2027, IECC residential (edition not named), IECC commercial (edition not named)NECIBCIRCIFCIECC Res.IECC Com. | All products | In development | Partial | |
| No date yet | Indiana | CodeIndiana moves to the 2023 NECNEC 2023. Commission adopted the final rule Aug 4, 2026; the docket (updated Aug 12, 2026) lists Attorney General approval, Governor approval, filing and effective date as TBD.NEC | All products | Adopted, not yet in force | Partial |
| No date yet | Michigan | CodeMichigan moves two codes to new editionsIRC 2021, IECC residential 2021IRCIECC Res. | Residential ESSSolar PVInvertersInterconnect devicesEV charging | Adopted, not yet in force | Partial |
All 12 changes ahead for inverters and power control systems
For information only. Your local building or fire official decides which code applies. We check state records often but can miss a recent change, so confirm with your official before you design, permit, or install. Terms of use