Solar Lattice

Product

Solis S6-GU(250-350)K-EHV-US

ID
prod:solis-s6-gu-ehv-us
IRI
https://solarlattice.org/kb/prod/solis-s6-gu-ehv-us
Status
active
Also known as
S6-GU250K-EHV-US, S6-GU300K-EHV-US, S6-GU350K-EHV-US, S6-250K-EHV-US, S6-300K-EHV-US, S6-350K-EHV-US, S6-GU250K-EHV-US-M12, S6-GU300K-EHV-US-M12, S6-GU350K-EHV-US-M12, S6-GU350K-EHV-US-M16, S6-250K-EHV-US-M12, S6-300K-EHV-US-M12, S6-350K-EHV-US-M12, S6-350K-EHV-US-M16
Category
Inverters
Make
solis
Product level
family

The Solis S6-GU(250-350)K-EHV-US is a family of three-phase string inverters made by Solis, with four models: 250K-M12, 300K-M12, 350K-M12 and 350K-M16. The certification listing describes them as transformerless, grid-support, utility-interactive PV inverters that are permanently connected. Every model accepts up to 1500 V DC. The 350K-M12 is rated at 1080 V DC and operates from 480 to 1500 V. Rated output current is 240.6 A on the 250K, 251 A on the 300K and 252.6 A on the 350K-M12. The 300K is rated for a 60 Hz grid. Efficiency is listed as 98.9% maximum and 98.5% CEC. The permitted ambient temperature range is -30 to +60 °C. Integrated AFCI (DC arc-fault protection) and PID recovery are built in. Communication is over RS-485, and PLC is available as an option. A DRM LINK Fail alarm points to a fault on the DRM link. To fix it, restart the inverter, check the DRM cables inside and outside the unit, and confirm the signal is normally closed.

<!-- review notes

Claims

manufactured_by

c1 drafted · lead Solis

review note: support check: partial - Evidence shows a 'solis' label and a certification listing with S6-GU models, but doesn't explicitly state Solis makes them (weakly implied by the name).

implements

c2 drafted · lead DC arc-fault protection

Integrated AFCI listed as YES for each model in the datasheet tables.

c3 drafted · lead PID recovery

Integrated PID recovery listed as YES.

review note: support check: partial - PID recovery YES for 250, 300, 350-M12 but the M16 model is not shown.

c6 drafted · lead Demand response modes (DRM)

The alarm table includes a DRM LINK Fail alarm; the DRM link signal is expected to be normally closed.

review note: support check: partial - The DRM LINK Fail alarm implies DRM support, but no passage explicitly states DRM mode support.

uses_protocol

c4 drafted · lead RS-485

c5 drafted · lead Power line communication

PLC is listed as an optional communication connection.

max_input_voltage

c7 drafted · lead nominal 1500 V

Conditions: Maximum DC input voltage, stated for 250K-M12, 300K-M12, 350K-M12 and 350K-M16 models

rated_output_current

c8 verified · fact nominal 240.6 A

Conditions: S6-250K-EHV-US-M12 rated output current

verified by: review-workflowverified on: 2026-10-24review note: possible conflict with c9 (same source; check the conditions); possible conflict with c10 (same source; check the conditions)

c9 drafted · lead nominal 251 A

Conditions: S6-300K-EHV-US-M12 rated output current

review note: possible conflict with c8 (same source; check the conditions); possible conflict with c10 (same source; check the conditions)

c10 drafted · lead nominal 252.6 A

Conditions: S6-350K-EHV-US-M12 rated output current

review note: possible conflict with c8 (same source; check the conditions); possible conflict with c9 (same source; check the conditions)

frequency

c11 drafted · lead nominal 60 HZ

Conditions: Rated grid frequency, S6-300K-EHV-US-M12

efficiency

c12 drafted · lead nominal 98.5 PERCENT

Conditions: CEC efficiency, stated for 250K-M12, 300K-M12, 350K-M12 and 350K-M16 models

review note: possible conflict with c13 (same source; check the conditions)

c13 drafted · lead nominal 98.9 PERCENT

Conditions: Maximum efficiency, stated for 250K-M12, 300K-M12, 350K-M12 and 350K-M16 models

review note: possible conflict with c12 (same source; check the conditions)

operating_temperature

c14 verified · fact -30–60 DEG_C

Conditions: Operating ambient temperature range, stated for 250K-M12, 300K-M12, 350K-M12 and 350K-M16 models

verified by: review-workflowverified on: 2026-10-24

Referenced by

Data