Solis S6-EH3P20K-H Inverter, Three-Phase, Hybrid, 20kW, High Voltage

A hybrid inverter is the brain of a solar installation with a battery. It takes the current produced by the panels, transforms it into the ordinary current of the house and decides every second where to send it: to the loads, to the battery or to the grid. This model is the powerful variant of the family, designed for buildings with high consumption, supplied on three phases. When the grid is interrupted, it switches to the battery by itself and the building continues to function, without your having to press anything.

It accepts up to 32 kW of panels, that is an installation of the order of 25-32 kWp, and delivers 20 kW to the house and the grid, enough for a large home, a workshop or a small commercial space. The backup output is also 20 kW, so it can support practically the entire building, not just a few sockets, and the overload reserve of 1.6 times the rated power for 10 seconds helps with starting motors, pumps or compressors. The battery is charged and discharged with up to 20 kW, which means you can fill it quickly in the hours with strong sun and empty it just as quickly in the evening, when consumption is at its peak. The four MPPT trackers (the circuits that look for the point of maximum production of each group of panels) allow different orientations on the same roof and give an extra production in the morning and in the evening, indicatively, depending on the placement. The IP66 enclosure resists dust and water jets, so it can also be installed outdoors, and the approximately 41 kg require two people for installation; if in future consumption grows, up to 6 units can be connected in parallel, that is up to 120 kW.

Output 3/N/PE 380 V or 400 V, 50/60 Hz, 20 kW / 20 kVA, maximum current 30.4 A / 28.9 A. Photovoltaic field: 1000 V maximum voltage, 600 V nominal, start-up from 160 V, 4 MPPT in the range 200-850 V, 20 A and 9 kW on each tracker, DC/AC ratio up to 1.6. High-voltage lithium-ion battery port 120-800 V, 50 A, 20 kW charging/discharging; backup 20 kW with 1.6x overload for 10 s. Maximum efficiency 97.7%, European 97.5%, IP66, cooling with intelligently controlled redundant fans, -25...+60 degrees C, CAN and RS485 communication with optional WiFi, cellular or LAN modules, paralleling up to 6 units on-grid and off-grid, standard warranty 5 years.

Who it suits

Suitable for a large house, a guesthouse or a workshop with a three-phase connection and 25-32 kWp of panels, which wants the whole building to run during a power outage, not just an emergency circuit.

Terms explained

• MPPT: The circuit that automatically looks for the combination of voltage and current at which the panels give the most energy; more MPPTs mean that groups of panels oriented differently can work independently, without dragging each other down.
• High-voltage (HV) battery: A battery in which the modules are connected in series to reach a few hundred volts; at the same stored energy a smaller current flows, so the cables are thinner and the losses lower.
• IP66: The resistance rating of the enclosure: the first 6 means completely dust-tight, the second 6 means protected against strong water jets, so the equipment can stay outdoors.

Technical specifications

Recommended applications

• Small commercial buildings and workshops with HV battery storage
• Large residential installations of 25-32 kWp
• Systems with full three-phase backup for the entire building
• Extension by paralleling up to 120 kW

Warranty

5 years

Technical details

Specifications confirmed from the manufacturer's datasheet

Solis S6-EH3P20K-H is the top model of the S6-EH3P(12-20)K-H series, a three-phase hybrid inverter of 20 kW for high-voltage batteries. The rated AC power is 20 kW, respectively 20 kVA apparent, with a three-phase 3/N/PE output at 380 V or 400 V, 50/60 Hz, and a maximum current of 30.4 A / 28.9 A.

The photovoltaic side accepts up to 32 kW of usable PV power, at a maximum voltage of 1000 V, a nominal voltage of 600 V and start-up from 160 V. The 4 MPPT trackers work in the range 200-850 V, with 20 A maximum current and up to 9 kW of power on each MPPT, which allows a DC/AC ratio of up to 1.6 and a better yield in the morning and evening hours.

The battery port accepts high-voltage lithium-ion in the range 120-800 V, with 50 A maximum current and 20 kW of charging/discharging power. The backup output delivers 20 kW with an overload of 1.6 times the rated power for 10 seconds.

The maximum efficiency is 97.7%, and the European one 97.5%. The enclosure has IP66 protection, cooling with intelligently controlled redundant fans and a weight of approximately 41 kg. The thermal operating range is -25...+60 degrees C. Standard communication includes CAN and RS485, with optional WiFi, cellular or LAN modules. Up to 6 units can be paralleled, both on-grid and off-grid, and the standard warranty is 5 years.