The Deye SUN-SG01/03LP1-EU series are single-phase hybrid inverters, combining grid-connected operation with an emergency power supply function (EPS). This enables the photovoltaic installation to power selected circuits during power outages. This solution is particularly practical for single-family homes and small commercial properties, where independence and flexible self-consumption management are key.
The inverters feature two independent MPPTs, facilitating high energy yields even with partial shading, panels facing different roof orientations, or varied strings. In practice, this translates to more stable energy production throughout the day. The high European efficiency ensures better performance in real operating conditions in Poland, not just in ideal test conditions.
The inverters offer monitoring and communication via popular interfaces (including WiFi and wired solutions), simplifying diagnostics in the application and enabling remote supervision by installers. The series is compatible with energy storage systems (lead-acid and lithium-ion batteries with BMS) and features an enclosure for use in demanding environments. European grid certifications and warranty terms are available depending on the variant and distributor.
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According to the official datasheet, the series achieves an European efficiency of 96.5% and an MPPT efficiency of 99.9%, which translates to high annual yields in variable solar irradiation conditions typical of the Central European climate - a result comparable to leading hybrid inverters in this power segment.
Two independent MPPT trackers with a DC input voltage range of 100-500 V allow for connecting strings with different orientations or tilt angles, and minimize losses when one side of the array is partially shaded - a significant advantage over single-phase inverters with a single MPPT.
The built-in EPS (Emergency Power Supply) function switches the system to backup power almost continuously. The inverter can handle peak overloads of up to 200% of its rated power for 10 seconds, allowing high-current devices (pumps, refrigerators) to be started without the need for a separate off-grid inverter.
The series holds VDE-AR-N 4105 (Germany), EN 50549, G99 (UK), CEI 0-21 (Italy) and IEC 61727/62116 certifications, which allows for connection to the grid without additional homologation procedures on most European markets.
For installations in Europe, Deye offers a 10-year warranty (5 years basic + 5 years extended), and the IP65 enclosure and operating range of -25°C to +60°C (with derating above 45°C) make the series suitable for installation in unheated industrial buildings.
LV architecture refers to battery currents reaching 135 A (at 6 kW and 48 V), which requires battery cables ranging from 35-70 mm² for longer cable runs and increases installation costs. Competitive HV inverters (e.g., Sungrow SH5.0RT with a range of 80-460 V or Growatt SPH6000TL3-BH-UP with 80-560 V) limit battery current to a few to several dozen amps, which simplifies and reduces cabling costs for the same power output.
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About the SUN-SG01/03LP1-EU series
These answers cover the whole series. Where a figure differs, the specification above is this model's own.