Sungrow SG15.0RT inverter 15kW on-grid three-phase

This is a grid inverter, without a battery: it takes the direct current produced by the panels and converts it into the usual 230/400 V current, which is consumed on the spot in the building, while the surplus goes into the grid. It has two independent panel inputs, which allows them to be mounted on two different slopes or orientations, without the weaker group dragging down the better one. In addition, it permanently monitors the direct current cables and stops the installation if an electric arc appears, that is a spark in a loose contact.

With 15,000 W of rated power and up to 22.5 kWp of panels accepted, it suits a building that consumes a lot during the day: office, workshop, shop or a large house. The fact that the panels can exceed the inverter's power is intentional, because the rated power only appears during peak hours; the rest of the day, the surplus of panels translates into higher actual production. The efficiency of 98.5%, respectively 98.1% European weighted, means that almost all the energy produced reaches the building. The IP65 enclosure with C5 anti-corrosion protection allows outdoor installation, including in aggressive environments, and cooling is by forced ventilation, with a typical noise of 45 dB(A), so the right position is next to a technical space, not next to a rest area.

Maximum input voltage 1,100 V, MPPT range 160-1,000 V, nominal 600 V, start-up 180 V; two MPPT with two strings each, maximum input current 50 A (25 A per MPPT), Isc 64 A, maximum recommended PV power 22.5 kW. Output 15,000 W at 230/400 V, 3/N/PE, maximum 16,500 VA (limited to 15,000 VA in Germany, Belgium and Australia), 25 A, 180-276 V per phase, 50 Hz (45-55 Hz), THD below 3%, power factor adjustable between 0.8 capacitive and 0.8 inductive. Maximum efficiency 98.5% and European 98.1%, transformerless design, IP65 with C5 corrosion resistance, 370x480x195 mm, 21 kg, intelligent forced cooling, 45 dB(A), -25...+60 C, altitude 4,000 m; AFCI, PID recovery, type II SPD on DC and AC, DC switch and leakage current protection. MC4 connectors on DC and quick connector on AC, communication WLAN, Ethernet, RS485, DI and DO; compliant with VDE-AR-N 4105, EN 50549-1, CEI 0-21, DIN VDE 0126-1-1, IEC 62109-2, IEC 61727, IEC 62116, EN 61000-6-1/-3.

Who it suits

Suitable for a building with a three-phase connection and consumption concentrated during the day (office, workshop, shop or large house), with an installation between 15 and 22.5 kWp and without a battery.

Terms explained

• On-grid: An inverter that works only together with the grid; during a power cut it stops, so as not to send voltage onto the line while repair work is being carried out.
• AFCI: The system that detects the spark from a loose contact on the direct current cables and stops the installation before it becomes a fire risk.
• String: A row of panels connected in series, connected together to one of the inverter's inputs.

Technical specifications

Recommended applications

• Small commercial and large residential on-grid systems
• Installations with bifacial modules and DC oversizing
• Roofs with two different orientations (2 MPPT)
• Industrial self-consumption projects up to 22.5 kWp

Technical details

Specifications confirmed from the manufacturer's datasheet

Sungrow SG15RT is a 15 kW three-phase on-grid inverter for 1000 Vdc systems, with two independent MPPT trackers and two strings on each MPPT. The maximum input voltage is 1100 V, the MPPT range 160-1000 V, the nominal voltage 600 V and start-up from 180 V. The maximum input current is 50 A (25 A per MPPT), the short-circuit current 64 A, and the maximum recommended photovoltaic power 22.5 kW.

On AC it delivers 15000 W rated at 230/400 V, 3/N/PE, with a maximum of 16500 VA (limited to 15000 VA in Germany, Belgium and Australia) and 25 A maximum current. The voltage range is 180-276 V per phase, the frequency 50 Hz (45-55 Hz), THD below 3% and the power factor adjustable between 0.8 capacitive and 0.8 inductive.

The maximum efficiency is 98.5% and the European one 98.1%. The enclosure is transformerless, IP65, with C5 corrosion resistance, dimensions 370x480x195 mm and 21 kg, intelligent forced cooling, typical noise 45 dB(A), range -25...+60 C, altitude 4000 m. It includes AFCI electric arc detection, PID recovery function, type II SPD on DC and AC, DC switch and leakage current protection. MC4 connectors on DC and quick connector on AC. Communication WLAN, Ethernet, RS485, DI and DO. Compliant with VDE-AR-N 4105, EN 50549-1, CEI 0-21, DIN VDE 0126-1-1, IEC 62109-2, IEC 61727, IEC 62116, EN 61000-6-1/-3.