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The Enphase IQ8HC Microinverter (model IQ8HC-72-M-INT) is the highest-output IQ8 variant for standard 54–72 cell modules, delivering 384 W maximum AC output — matching the IQ8X in absolute output but with a lower MPP voltage range suited to standard-Vmp panels rather than high-voltage 80+ half-cell formats. At 97.4% peak efficiency (96.8% EU weighted — the highest EU efficiency in the IQ8MC/AC/HC family), it is the right choice where installers need to maximise output per panel from a 72-cell or 144 half-cell module. CE marked, certified to G98, G99, and G100, backed by a 25-year limited warranty with connected IQ Gateway. Source: UK datasheet DSH-00198-5.0, March 2026.
At 384 W AC, the IQ8HC extracts the most power possible from 72-cell and 144 half-cell panels without stepping up to the 80+ half-cell format required by the IQ8X. For installations with 400–450 W panels where Vmp stays comfortably above 29.5 V, the IQ8HC is the highest-performing choice.
The IQ8HC accepts up to 560 W DC input (same ceiling as the IQ8X). This allows pairing with 450–500 W modules at a DC/AC ratio above 1.0, capturing more energy at moderate irradiance while accepting modest clipping at peak conditions — a well-proven strategy for UK annual yield optimisation.
The EU weighted efficiency figure accounts for real-world part-load operation, weighting efficiency at 5%, 10%, 20%, 30%, 50%, and 100% of rated power. The IQ8HC's 96.8% is the highest in the IQ8MC/AC/HC family — translating to marginally lower losses over a full year of UK generation.
All three IQ8 72-cell models share the same 212 × 175 × 30.2 mm body, 1.1 kg weight, and Stäubli MC4 DC connectors. This means installers can use the same racking clips, cable management, and installation technique across a mixed IQ8MC/AC/HC site — or switch between models on different jobs without any re-tooling.
The IQ8HC supports the full set of IQ8 advanced grid functions: Power Export Limiting (PEL / G100), phase imbalance management (PIM), loss of phase detection (LOP), and power factor control. These functions make the IQ8HC suitable for commercial rooftop installations where DNO export constraints are common.
The IP67-rated, UV-stabilised polymer enclosure withstands full immersion and dust ingress in any UK or European climate. The operating range extends from -40°C (frozen Scottish winter) to +65°C (south-facing UK summer roof surface) without any performance derating or cooling intervention.
| Technical Specifications — IQ8HC-72-M-INT (UK Datasheet DSH-00198-5.0, March 2026) | |
|---|---|
| DC Input | |
| Typical module compatibility | 54-cell/108 HC, 60-cell/120 HC, 66-cell/132 HC, 72-cell/144 HC |
| Min/Max input voltage | 18 V / 60 V |
| Startup input voltage | 22 V |
| Rated input voltage | 37.0 V |
| Min/Max MPP voltage | 29.5 V / 45 V |
| Max input current (Idcmax) | 14 A |
| Max short-circuit input current (Iscmax) | 25 A (max module Isc: 20 A, per IEC 62548 ×1.25) |
| Max input power (Pdcmax) | 560 W |
| AC Output | |
| Max AC output power | 384 W |
| Max apparent power | 380 VA |
| Rated power | 380 W |
| Nominal grid voltage | 230 V (range: 184–276 V) |
| Nominal frequency | 50 Hz (range: 45–55 Hz) |
| Max output current | 1.67 A |
| Max units per single-phase 20A circuit | 9 (L+N) |
| Max units per three-phase 20A circuit | 27 (3L+N) |
| Max units per IQ Cable section (single/multi-phase) | 8 (L+N) / 18 (3L+N) |
| Power factor (adjustable) | 0.8 leading … 0.8 lagging |
| Total harmonic distortion | <5% |
| Peak efficiency | 97.4% |
| EU weighted efficiency | 96.8% |
| Topology | Isolated HF transformer |
| Night-time power loss | 50 mW |
| Mechanical & Environmental | |
| Dimensions (H × W × D) | 212 mm × 175 mm × 30.2 mm (excl. mounting brackets) |
| Weight (with mounting plate) | 1.1 kg |
| Ambient temperature range | -40°C to +65°C |
| Relative humidity | 4–100% (condensing) |
| Cooling | Natural convection — no fans |
| Enclosure | Class II double-insulated, corrosion-resistant polymer |
| IP rating | Outdoor — IP67 |
| Max altitude | < 2,600 m |
| DC connector | Stäubli MC4 (integrated) |
| AC connector | Enphase IQ Cable |
| Standards & Compliance | |
| Grid compliance | G98, G99, G100 |
| Safety | EN IEC 62109-1, EN IEC 62109-2 |
| EMC | EN IEC 61000-3-2/-3-3/-6-2/-6-3, EN IEC 50065-1/-2-2, EN 55011 |
| Product labelling | CE |
| Limited warranty | Up to 25 years (requires connected IQ Gateway) |
| Communication | PLC 110–120 kHz (Class B), narrowband 200 Hz |
When should I choose IQ8HC over IQ8AC?
Can I pair 450 W modules with the IQ8HC?
What is the IQ8HC max circuit size for single-phase?
Is the IQ8HC fully backward compatible with IQ7 sites?
What advanced grid functions does it support?
Details & Craftsmanship
Every detail has been carefully considered to bring you the perfect product.
Details & Craftsmanship
Every detail has been carefully considered to bring you the perfect product.
Details & Craftsmanship
Every detail has been carefully considered to bring you the perfect product.
Description
The Enphase IQ8HC Microinverter (model IQ8HC-72-M-INT) is the highest-output IQ8 variant for standard 54–72 cell modules, delivering 384 W maximum AC output — matching the IQ8X in absolute output but with a lower MPP voltage range suited to standard-Vmp panels rather than high-voltage 80+ half-cell formats. At 97.4% peak efficiency (96.8% EU weighted — the highest EU efficiency in the IQ8MC/AC/HC family), it is the right choice where installers need to maximise output per panel from a 72-cell or 144 half-cell module. CE marked, certified to G98, G99, and G100, backed by a 25-year limited warranty with connected IQ Gateway. Source: UK datasheet DSH-00198-5.0, March 2026.
At 384 W AC, the IQ8HC extracts the most power possible from 72-cell and 144 half-cell panels without stepping up to the 80+ half-cell format required by the IQ8X. For installations with 400–450 W panels where Vmp stays comfortably above 29.5 V, the IQ8HC is the highest-performing choice.
The IQ8HC accepts up to 560 W DC input (same ceiling as the IQ8X). This allows pairing with 450–500 W modules at a DC/AC ratio above 1.0, capturing more energy at moderate irradiance while accepting modest clipping at peak conditions — a well-proven strategy for UK annual yield optimisation.
The EU weighted efficiency figure accounts for real-world part-load operation, weighting efficiency at 5%, 10%, 20%, 30%, 50%, and 100% of rated power. The IQ8HC's 96.8% is the highest in the IQ8MC/AC/HC family — translating to marginally lower losses over a full year of UK generation.
All three IQ8 72-cell models share the same 212 × 175 × 30.2 mm body, 1.1 kg weight, and Stäubli MC4 DC connectors. This means installers can use the same racking clips, cable management, and installation technique across a mixed IQ8MC/AC/HC site — or switch between models on different jobs without any re-tooling.
The IQ8HC supports the full set of IQ8 advanced grid functions: Power Export Limiting (PEL / G100), phase imbalance management (PIM), loss of phase detection (LOP), and power factor control. These functions make the IQ8HC suitable for commercial rooftop installations where DNO export constraints are common.
The IP67-rated, UV-stabilised polymer enclosure withstands full immersion and dust ingress in any UK or European climate. The operating range extends from -40°C (frozen Scottish winter) to +65°C (south-facing UK summer roof surface) without any performance derating or cooling intervention.
| Technical Specifications — IQ8HC-72-M-INT (UK Datasheet DSH-00198-5.0, March 2026) | |
|---|---|
| DC Input | |
| Typical module compatibility | 54-cell/108 HC, 60-cell/120 HC, 66-cell/132 HC, 72-cell/144 HC |
| Min/Max input voltage | 18 V / 60 V |
| Startup input voltage | 22 V |
| Rated input voltage | 37.0 V |
| Min/Max MPP voltage | 29.5 V / 45 V |
| Max input current (Idcmax) | 14 A |
| Max short-circuit input current (Iscmax) | 25 A (max module Isc: 20 A, per IEC 62548 ×1.25) |
| Max input power (Pdcmax) | 560 W |
| AC Output | |
| Max AC output power | 384 W |
| Max apparent power | 380 VA |
| Rated power | 380 W |
| Nominal grid voltage | 230 V (range: 184–276 V) |
| Nominal frequency | 50 Hz (range: 45–55 Hz) |
| Max output current | 1.67 A |
| Max units per single-phase 20A circuit | 9 (L+N) |
| Max units per three-phase 20A circuit | 27 (3L+N) |
| Max units per IQ Cable section (single/multi-phase) | 8 (L+N) / 18 (3L+N) |
| Power factor (adjustable) | 0.8 leading … 0.8 lagging |
| Total harmonic distortion | <5% |
| Peak efficiency | 97.4% |
| EU weighted efficiency | 96.8% |
| Topology | Isolated HF transformer |
| Night-time power loss | 50 mW |
| Mechanical & Environmental | |
| Dimensions (H × W × D) | 212 mm × 175 mm × 30.2 mm (excl. mounting brackets) |
| Weight (with mounting plate) | 1.1 kg |
| Ambient temperature range | -40°C to +65°C |
| Relative humidity | 4–100% (condensing) |
| Cooling | Natural convection — no fans |
| Enclosure | Class II double-insulated, corrosion-resistant polymer |
| IP rating | Outdoor — IP67 |
| Max altitude | < 2,600 m |
| DC connector | Stäubli MC4 (integrated) |
| AC connector | Enphase IQ Cable |
| Standards & Compliance | |
| Grid compliance | G98, G99, G100 |
| Safety | EN IEC 62109-1, EN IEC 62109-2 |
| EMC | EN IEC 61000-3-2/-3-3/-6-2/-6-3, EN IEC 50065-1/-2-2, EN 55011 |
| Product labelling | CE |
| Limited warranty | Up to 25 years (requires connected IQ Gateway) |
| Communication | PLC 110–120 kHz (Class B), narrowband 200 Hz |
