The Enphase IQ8X Microinverter (model IQ8X-80-M-INT) is
Enphase's highest-output single-phase microinverter for the UK market — purpose-engineered for
modern 80-half-cell, 88-half-cell, and 96-cell high-power PV modules that are now
the standard in new residential and commercial installations. Delivering a
384 W maximum AC output and a 97.5% peak efficiency
(96.7% EU weighted), it extracts the maximum generation from today's large-format panels while
maintaining the per-panel safety and monitoring that define the Enphase IQ System. It carries a
25-year limited warranty (with connected IQ Gateway), is certified to
G98, G99, and G100, and carries the CE mark per the current
GB datasheet DSH-00394-3.0 (June 2025).
96.7%
EU Weighted Efficiency
25 Years
Limited Warranty
⚠ Installer Requirement: The IQ8X requires the Enphase IQ Cable for AC connection — standard round cable is not permitted. DC connection uses the integral Stäubli MC4 connectors. A connected, internet-accessible IQ Gateway is required to activate the full 25-year warranty. Installation must comply with G98/G99 DNO notification requirements as applicable, and all local wiring regulations (BS 7671).
⚠ Module Compatibility: The IQ8X is optimised for 80-half-cell, 88-half-cell, and 96-cell modules with a DC MPP voltage window of 43–60 V and a maximum DC input voltage of 79.5 V. It is not the best match for standard 60-cell or 72-cell modules — check the Enphase compatibility calculator at enphase.com/en-gb/installers/microinverters/calculator before specifying.
ℹ Mixed IQ7/IQ8 Systems: IQ8 Series microinverters can be added to existing IQ7 system sites on the same IQ Gateway, but only for grid-tied Solar Only or Solar + Battery (IQ Battery 5P without backup) configurations. IQ7 microinverters cannot be added to sites where IQ8 units are already installed on the same gateway.
Built for High-Power Modules
The IQ8X's DC MPP voltage range of 43–60 V is specifically aligned with the Vmp characteristics of modern 80+ half-cell modules, which typically operate at 38–46 V under UK irradiance conditions. Pairing the IQ8X with correctly matched modules avoids clipping losses and allows the microinverter to stay in MPPT across the widest possible range of irradiance — early morning, overcast, and high-summer noon.
384 W AC — Industry-High Output
At 384 W maximum AC output, the IQ8X delivers more AC power per unit than any other standard Enphase single-phase microinverter. For roof areas with limited space or shading constraints, using higher-power microinverters on fewer panels can maintain system kWp targets while reducing the total number of cable connections and installation time.
Burst Mode — More Energy in Low Light
Enphase's patented Burst Mode technology allows the IQ8X to continue producing power at very low irradiance levels where a conventional inverter would drop out. This extends generation into early morning, late evening, and overcast conditions — delivering measurably more annual kWh than the nameplate rating alone suggests.
Rapid Shutdown — RSD Compliance
The IQ8X implements module-level rapid shutdown: when the IQ Gateway de-energises the AC bus, each microinverter immediately reduces its DC operating voltage to a safe level. This protects firefighters and emergency responders from dangerous DC voltages at rooftop level — meeting the fire safety requirements that are increasingly mandated across UK and European installations.
Isolated HF Transformer Topology
The IQ8X uses an isolated high-frequency transformer topology, providing galvanic isolation between the PV module's DC circuit and the AC grid. This eliminates the risk of DC ground faults propagating to the AC side, simplifies array earthing design, and is the reason the protective class for all ports is rated Class II.
Per-Panel Monitoring via PLC
Every IQ8X reports production data to the IQ Gateway via powerline communication (PLC) at 110–120 kHz — no additional wiring or Wi-Fi required per inverter. Panel-level data is visible in the Enphase App and Installer Platform, enabling rapid fault identification, remote diagnostics, and performance warranty evidence for homeowners.
| Technical Specifications — IQ8X-80-M-INT (GB Datasheet DSH-00394-3.0, June 2025) |
| DC Input |
| Typical module compatibility |
80-half-cell, 88-half-cell, 96-cell |
| Min/Max input voltage |
25 V / 79.5 V |
| Startup input voltage |
30 V |
| Rated input voltage |
51.5 V |
| Min/Max MPP voltage |
43 V / 60 V |
| Max input current |
10 A |
| Max short-circuit DC input current (Iscmax) |
16 A (max module Isc: 13 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 single-phase IQ Cable section |
8 (L+N) |
| Max units per three-phase IQ Cable section |
18 (3L+N) |
| Power factor (adjustable) |
0.8 leading … 0.8 lagging |
| Total harmonic distortion |
<5% |
| Peak efficiency |
97.5% |
| EU weighted efficiency |
96.7% |
| 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 |
Which solar modules is the IQ8X best matched to?
The IQ8X is designed for 80-half-cell, 88-half-cell, and 96-cell modules with a DC MPP voltage in the 43–60 V range. These are the large-format, high-wattage panels (typically 400–600 W DC) that dominate new residential and commercial supply in 2024–25. For standard 60-cell or 72-cell modules with lower Vmp, the IQ8MC, IQ8AC, or IQ8HC is the appropriate choice.
Can I use the IQ8X on a three-phase property?
Yes. In a three-phase property, microinverters are distributed across the three phases using the three-phase IQ Cable (Q-25-xx-3P variants), which automatically balances output across L1, L2, and L3. Each IQ8X unit outputs single-phase 230 V L-N; up to 27 units can be connected per three-phase 20A circuit, and up to 18 units per IQ Cable section.
How does the 25-year warranty work?
The full 25-year limited warranty applies provided an internet-connected IQ Gateway is installed on site and remains operational throughout the warranty period. Without a connected gateway, a reduced warranty period applies. Full warranty terms are available at enphase.com/installers/resources/warranty.
Does the IQ8X support export limiting and G100 compliance?
Yes. The IQ8X supports Power Export Limiting (PEL) for G100 compliance, along with phase imbalance management (PIM), loss of phase detection (LOP), and power factor control — all configurable via the IQ Gateway. An IQ Gateway Metered with CT clamps is required for PEL and consumption-based functions.
Is rapid shutdown built into the IQ8X?
Yes. Module-level rapid shutdown is integral to the IQ8X and is triggered automatically when the IQ Gateway de-energises the AC bus. No additional rapid shutdown devices are required — the microinverter itself handles safe DC voltage reduction at module level.
