Solis S6-EH3P15K-H Inverter, Three-phase, Hybrid, 15kW, High Voltage

It is the device that links the panels, the battery, the house and the grid and decides at every moment where the energy goes: straight to the loads, into the battery or into the grid. The model is three-phase, that is for houses with a three-phase connection, and uses high-voltage batteries, made of modules connected in a chain, which reduces the losses in the cables. When the grid goes down, it takes over the supply so fast that sensitive appliances do not have time to switch off.

The 15 kW of continuous power cover the consumption of a large house or of a villa, and the backup output delivers 15 kW as well, with 1.6 times the rated power for 10 seconds for starting motors. Up to 24 kW of panels can be mounted on the roof, that is a ratio of 1.6 between panels and inverter, a choice that brings more energy in the morning, in the evening and in winter. The four independent inputs each carry 9 kW, so the roof can be split into four zones with different orientations. The battery works between 120 and 800 V and charges or discharges at up to 15 kW, and the losses when passing through the battery are small: 98.6% on charge and 97.2% on discharge, meaning that almost all of the energy put into the battery is recovered. The inverter also accepts unequal consumption on the three phases. The IP66 enclosure is well sealed against dust and water, the device measures 599 x 546 x 243 mm and 31.7 kg, and the system status is monitored from the phone via Bluetooth and the app.

Rated AC power 15 kW / 15 kVA, three-phase output 3/N/PE at 380 V or 400 V, 50/60 Hz, maximum AC current 22.8 A / 21.7 A. PV input: maximum usable power 24 kW (DC/AC ratio 1.6), maximum input voltage 1000 V, nominal voltage 600 V, start-up from 160 V, 4 MPPT trackers with a range of 200-850 V, 20 A and up to 9 kW on each MPPT. High-voltage lithium-ion battery port 120-800 V, 50 A maximum current, 15 kW charge/discharge power. Backup output 15 kW, overload 1.6 x Pn for 10 s, switching time under 10 ms, accepts unbalanced three-phase loads and half-wave loads. Maximum efficiency 97.7%, European 97.5%, 98.6% when charging the battery from PV or AC and 97.2% when discharging the battery to AC. IP66, cooling with redundant fans, 599 x 546 x 243 mm, 31.7 kg, operating temperature -25...+60 degrees C; local LED interface plus Bluetooth and mobile app, CAN and RS485 communication, optionally WiFi, cellular or LAN, standard warranty 5 years.

Who it suits

Suited to a large house or a three-phase villa with a 20-24 kWp installation and a high-voltage battery, where consumption is unevenly spread across the phases and a switchover to backup without a visible interruption is required.

Terms explained

• Charge and discharge efficiency: How much of the energy put into the battery is recovered at the output; values above 97% mean that very little is lost as heat on each cycle.
• Unbalanced loads: The situation in which the three phases of the house consume very differently from one another; the inverter withstands it without shutting down.
• DC/AC ratio: The ratio between the power of the installed panels and the power of the inverter; 1.6 means excess panels, which bring extra energy in the hours and months with weak sun.

Technical specifications

Recommended applications

• Large houses and three-phase villas with HV battery storage
• Installations of 20-24 kWp with DC oversizing
• Three-phase backup with unbalanced loads
• Practices, offices and workshops with high self-consumption

Warranty

5 years

Technical details

Specifications confirmed from the manufacturer's datasheet

Solis S6-EH3P15K-H is the 15 kW version of the S6-EH3P(12-20)K-H series of three-phase hybrid inverters for high-voltage batteries. The rated AC power is 15 kW, respectively 15 kVA, with three-phase output 3/N/PE at 380 V or 400 V, 50/60 Hz, and a maximum current of 22.8 A / 21.7 A.

The photovoltaic side accepts up to 24 kW of usable PV power (DC/AC ratio of 1.6), at a maximum voltage of 1000 V, nominal voltage 600 V and start-up from 160 V. The 4 MPPT trackers work in the 200-850 V range, with 20 A maximum current on each and up to 9 kW of power per MPPT.

The battery port accepts high-voltage lithium-ion in the 120-800 V range, with 50 A maximum current and 15 kW charge/discharge power. The backup output delivers 15 kW, with an overload of 1.6 times the rated power for 10 seconds and a switching time under 10 ms. The inverter accepts unbalanced three-phase loads and half-wave loads.

The measured efficiencies are: 97.7% maximum, 97.5% European, 98.6% when charging the battery from PV or AC and 97.2% when discharging the battery to AC. The enclosure has IP66 protection, cooling with redundant fans, dimensions of 599 x 546 x 243 mm and a mass of 31.7 kg; the thermal range is -25...+60 degrees C. The local interface is LED plus Bluetooth and a mobile app, and communication is via CAN and RS485, optionally WiFi, cellular or LAN. The standard warranty is 5 years.