The Deye SUN-M80/100G4-EU-Q0 is a single-phase grid-tied micro inverter that converts solar energy directly at each panel, supporting up to 2 solar panels per unit with independent MPPT tracking. Designed for permanent rooftop installations across Europe, it achieves 96.5% peak efficiency and includes a certified NA protection relay integrated into the housing — available in 800W (M80) and 1000W (M100) output variants.
The G4 generation introduces three major improvements over the previous G3: the NA protection relay is now integrated directly into the inverter housing (no external cable box), the warranty has been extended to 15 years (up from 5 years on the G3), and the throttling logic now reduces actual AC output power rather than distributing limits across MPPT inputs. The unit is IP67 sealed, fanless, and supports Wi-Fi, PLC, and Zigbee communication for both cloud and local Home Assistant monitoring.
The SUN-M80G4-EU-Q0 delivers 800W AC output at 220/230V with 96.5% peak efficiency and >99% MPPT efficiency. It accepts up to 60V Voc on each of its 2 MPPT inputs, with an Impp of 13A per channel and a 20V start-up voltage. Dimensions are 280.5 × 190 × 40 mm, weight is 3 kg, and the unit is rated IP67 for operation between −40°C and +65°C. The SUN-M100G4-EU-Q0 is the 1000W variant with the same physical and input specifications.
The inverter is compatible with any standard crystalline silicon or thin-film solar panel with an open-circuit voltage (Voc) up to 60V and a short-circuit current (Isc) up to 19.5A per MPPT input. This covers most 60-cell, 72-cell, and half-cut monocrystalline panels in the 250–400W range. The 40–55V full-load MPPT range is optimised for modern high-efficiency mono panels. One inverter can be connected to 1 or 2 panels independently.
The inverter mounts directly to the module rail beneath each solar panel using standard M8 or M10 bracket hardware (not included). The DC input connectors accept LY01 (Betteri BC01) panel connectors — an adapter is included in the box. The AC output connects to the mains via a standard waterproof connector; a Schuko mains cable is not included and must be purchased separately. Connection sequence: connect mains AC first, then the DC panel connectors. Wi-Fi setup requires a 2.4GHz network with a password of maximum 15 characters.
The inverter carries CE marking under the Low Voltage Directive (2014/35/EU), EMC Directive (2014/30/EU), and Radio Equipment Directive (2014/53/EU). It is certified to IEC/EN 62109-1 and 62109-2 for inverter safety and complies with EN 50549-1 for European LV grid connection. Country-specific grid approvals include VDE-AR-N 4105 (Germany), G99 (UK), CEI 0-21 (Italy), OVE-Richtlinie R25 (Austria), and RD 140 / UNE 217002 (Spain). All certificates and the EU Declaration of Conformity are available for download from the Deye website.
Unlike the Hoymiles HMS-800-2T, which ships the NA protection relay as a separate external unit mounted on a cable, the Deye SUN-M80G4-EU-Q0 integrates the relay directly into the inverter housing — resulting in fewer components, a cleaner installation, and one less potential failure point. The Deye also offers a 15-year warranty versus Hoymiles' 12-year base warranty, at a lower price point. The Hoymiles has a slight efficiency advantage (96.7% vs 96.5%) and benefits from a larger OpenDTU open-source monitoring community.
The SUN-M80/100G4-EU-Q0 includes a 15-year manufacturer's warranty covering manufacturing defects and performance degradation. This is one of the longest standard warranties in the micro inverter category — Hoymiles and APsystems offer 12 years on comparable products. Deye provides remote technical support via the SOLARMAN monitoring platform. For EU customers, the inverter is covered by EU consumer protection regulations including a 2-year statutory guarantee and a 14-day right of return.
The Deye SUN-M80/100G4-EU-Q0 ships to all EU member states, the United Kingdom, Norway, and Switzerland from our European warehouse. Delivery typically takes 3–7 business days within the EU. VAT is included in the displayed price for EU orders. Orders over a minimum threshold qualify for free shipping — see the cart for current threshold by country.
No — the SUN-M80/100G4-EU-Q0 is a grid-tied micro inverter and requires a live mains connection to operate. This is required by EU and national grid safety standards: the inverter must detect a stable grid frequency and voltage before it begins generating. It will automatically shut down within milliseconds of a grid outage (anti-islanding protection per IEC 62116). For backup power capability, a Deye hybrid inverter with battery storage would be required — the SUN-M80/100G4 is designed for generation-only rooftop applications.
