Enphase IQ8X-80-M-DOM-US Microinverter Domestic Content

The Enphase IQ8X-80-M-DOM-US is a high-performance microinverter from the IQ8 Series, specifically designed for the latest generation of high-powered solar PV modules. As part of Enphase’s industry-leading microinverter lineup, it features microgrid-forming capability (when paired with an IQ System Controller), enabling off-grid operation during outages as part of a full Enphase Energy System.

Key Features

• Industry-first microgrid-forming and software-defined design with split-phase power conversion for efficient DC-to-AC conversion.
• Proprietary ASIC (application-specific integrated circuit) in advanced 55 nm technology for superfast response to load and grid changes, supporting grid-tied and off-grid modes while easing battery sizing constraints in home energy systems.
• Optimized for high-voltage, high-output PV modules, including those with 80-half-cell, 88-half-cell, and 96-cell configurations.
• Integrated Stäubli MC4 DC connectors for quick, plug-and-play module connections.
• Lightweight, compact, fanless design with natural convection cooling for reliable outdoor performance.
• Part of the Enphase Energy System, integrating seamlessly with IQ Batteries, IQ Gateway, and the Enphase App for monitoring and control.
• DOM-US variant indicates enhanced U.S. domestic manufacturing content: the Printed Circuit Board Assembly (PCBA), electrical parts, and enclosure are domestically manufactured (made in the U.S. with key components produced domestically) to help qualify for the Domestic Content Bonus Adder under the federal Investment Tax Credit (ITC), per the Inflation Reduction Act (IRA). This is explicitly noted in Enphase’s official datasheets (footnote on the IQ8X-80-M-DOM-US model).
• Rapid shutdown compliance and low-voltage DC for enhanced safety and fire protection.
• Industry-leading up to 25-year limited warranty (when installed with an internet-connected IQ Gateway).

Domestic Content Advantage

The DOM-US designation helps solar projects—particularly commercial, C&I, or third-party-owned (TPO) residential systems—qualify for the ITC’s Domestic Content Bonus Adder, which adds 10 percentage points to the base ITC credit (e.g., boosting a 30% ITC to 40%) when prevailing wage and apprenticeship requirements are met (or 2 percentage points otherwise).

This bonus requires meeting IRS thresholds for domestic content in manufactured products (e.g., microinverters count as a major line item in Safe Harbor tables), with percentages rising over time (45% in 2025, 50% in 2026, and 55% thereafter). By incorporating higher domestic content in critical components like the PCBA and enclosure, the IQ8X-80-M-DOM-US makes it easier to achieve the overall project threshold, often reducing reliance on additional U.S.-made elements (such as racking or modules). Enphase provides manufacturer certifications and reliance letters to support claims. Final eligibility is project-specific and depends on the full system mix, construction start date, and IRS rules (e.g., via Notices like 2024-41 and updates). Always consult a tax advisor or EPC firm for verification.

Technical Specifications

• Input (DC) Side:
  • Commonly paired module power: 320–540 W
  • MPPT voltage range: 43–60 V
  • Operating range: 25–79.5 V
  • Maximum input DC voltage: 79.5 V
  • Maximum continuous DC current: 10 A
  • Maximum input short-circuit current: 16 A
  • Maximum module Isc: 13 A
• Output (AC) Side (at 240 V / 208 V):
  • Peak output power: 384 VA @ 240 Vac | 366 VA @ 208 Vac
  • Maximum continuous output power: 380 VA @ 240 Vac | 360 VA @ 208 Vac
  • Nominal grid voltage: 240 V split-phase (L-L, 180°) | 208 V single-phase (L-L, 120°)
  • Maximum continuous output current: 1.58 A @ 240 V | 1.73 A @ 208 V
  • Nominal frequency: 60 Hz
  • CEC weighted efficiency: 96.5%
  • Peak efficiency: ~97.3% @ 240 V
  • Nighttime power consumption: ~26 mW @ 240 V
  • Total harmonic distortion: <5%
  • Power factor: Adjustable (0.85 leading to 0.85 lagging; default 1.0)
• Mechanical & Environmental:
  • Dimensions (H × W × D): 212 mm × 175 mm × 30.2 mm (8.3″ × 6.9″ × 1.2″)
  • Weight: ~1.1 kg (2.43 lb)
  • Ambient temperature range: -40°C to +65°C (-40°F to +149°F)
  • Enclosure: NEMA Type 6, outdoor-rated, IP67-equivalent protection, Class II double-insulated, corrosion-resistant polymeric
  • Cooling: Natural convection (no fans)
• Compliance & Grid Support:
  • Meets IEEE 1547:2018 (UL 1741-SB), CA Rule 21 (UL 1741-SA), UL 62109-1, FCC Part 15 Class B, and more.
  • Supports advanced grid functions, remote updates, and rapid shutdown per NEC requirements.

The IQ8X-80-M-DOM-US excels in systems using modern high-power panels (e.g., 400W+ modules), maximizing energy harvest with module-level optimization, minimal clipping on oversized arrays, and Enphase’s patented technologies like Burst Mode for enhanced production. It’s an ideal choice for residential or commercial solar + storage setups prioritizing grid independence, high reliability, future-proof performance, and maximized federal tax incentives through domestic content. For full compatibility, use Enphase’s online microinverter calculator. Installation requires an IQ Gateway and appropriate cabling/branch circuit planning (e.g., up to 10 units per 20 A branch at 240 V).