Zonergy Residential Single-Phase On-Grid Inverter, Mercury 3680-S1

The Zonergy Mercury 3680‑S1 is a 3.68 kW single‑phase on‑grid string inverter with two independent MPPTs, designed for residential PV systems and supporting up to 5.52 kWp of DC panel power at 600 V max input. Its MPPTs operate from 100–550 V (250–520 V full‑load range) with 16 A input current and 20 A short‑circuit current per tracker, feeding 230 V (180–276 V) grid at 50/60 Hz with 16 A max AC output, a power factor adjustable from 0.8 leading to 0.8 lagging, <3% THD, and 97.7% max / 97.2% European efficiency. Protection features include insulation impedance detection, DC reverse connection, ground‑fault and over‑current protection, integrated DC switch, optional AFCI, and an IP66 transformerless design operating from −25°C to +60°C up to 3000 m, with natural cooling, <29 dB noise, RS485 plus Wi‑Fi/4G monitoring, intelligent weak‑grid adaptation, remote parameter/firmware management, and a 5‑year warranty under extensive IEC/EN certifications.