Solis Three Phase Grid-Tied Inverter: S6-GC(80-125)K

Most commercial rooftops top out well before 80kW. Once a project crosses into that territory, whether it's a large industrial rooftop, a ground-mounted C&I plant, or the entry point of a utility-scale array, the inverter stops being a single component decision and starts being a plant-architecture decision: how many units, how they talk to each other, and how the site behaves if one of them has a problem. The S6-GC(80-125)K is Solis's answer for that scale, and the datasheet reads less like a bigger version of their standard commercial line and more like a purpose-built plant controller with power electronics attached.

Where the S6-GC(80-125)K Fits

This series covers five models 80K, 100K, 110K, 125K, and a 125K-HV variant for 480V grids and it's aimed squarely at C&I and utility PV projects rather than rooftop-commercial. The realistic deployment pattern is multiple units on one site: a 2MW ground-mount plant might run fifteen to twenty of these in parallel, and that's exactly the scenario Solis has engineered around, not an afterthought bolted onto a single-unit design.

Fire and Grid Safety Built In

At megawatt scale, a fire risk or a grounding fault isn't a minor service ticket, it's a plant-down event. The S6-GC(80-125)K addresses this with AI-based millisecond arc protection (AFCI) that detects and interrupts arc faults before they escalate, paired with real-time PV grounding detection and protection that continuously monitors insulation integrity across the DC side. For sites where Rapid Shutdown compliance matters, the AFCI system also cooperates with RSD functionality as an optional configuration. On top of that, integrated meteorological equipment feeds into an intelligent system-inefficiency warning, so underperformance gets flagged before it shows up as a quarter of lost revenue.

Running Multiple Units as One Plant

This is where the S6-GC(80-125)K separates itself from a standard on-grid inverter. It supports a master-slave export power control setup across up to 10 units in parallel, letting the whole array respond to grid export limits as one coordinated system rather than ten inverters independently guessing at their share. Layered on top of that is what Solis describes as the industry's first combination of master-slave export control with three-phase unbalanced output control — the inverter can allocate power per phase on demand, which matters on grids that aren't perfectly balanced across all three phases (a common real-world condition, not an edge case).

For integration, there are dual independent RS485 ports, built for sites where the inverter needs to talk to a third-party SCADA or monitoring layer alongside Solis's own systems. It also supports single and multiple genset applications without needing a separate external genset controller, relevant for sites running on backup or hybrid generation during grid outages.

Model-by-Model Specifications

Picking Between 80K, 100K, 110K, 125K and 125K-HV

• Working on a standard 400/415V grid connection? The 80K, 100K, 110K and 125K cover that range, and the choice between them is purely about matching your planned DC array size, with support for up to 150% DC oversizing across all four.

• Connecting to a 480V grid? The 125K-HV is the only model in the series built for that voltage, with a higher rated input voltage (720V) to match.

• Sizing strings and MPPTs? The 80K and 100K run 8 MPPTs across 16 strings; the 110K, 125K and 125K-HV step up to 10 MPPTs across 20 strings, giving more flexibility to split larger arrays.

• Planning a multi-unit plant? Every model in the range supports the same 10-unit master-slave parallel control, so mixing models across a site (say, 125K units on the main array and an 80K on a smaller block) doesn't break the coordinated export control.

Site and Installation Notes

The S6-GC(80-125)K is built to sit outdoors in demanding conditions: an IP66 enclosure, an operating range of -30°C to +60°C, 0–100% relative humidity tolerance, and certification up to 4000m altitude. Cooling is handled through an intelligent fan system, DC connections use standard MC4 connectors, and AC termination uses OT terminals rated up to 240mm², sized for the current these units actually carry. Communication runs over RS485 as standard, with optional WiFi (S3-WiFi-ST), GPRS (S3-GRPS-ST), or PLC modules for sites that need remote monitoring without running a dedicated network cable.

Get Pricing and the Full Datasheet

Pricing for the S6-GC(80-125)K depends on model and project scale, so it isn't listed here. Contact our team for a current quote, or download the full datasheet for the complete technical specification sheet.

Browse the full Solis on-grid inverter range or the wider Solis lineup on our products page. OSG Oriana India Pvt Ltd is the authorized PAN India distributor for Solis on grid inverters, from 1kW residential units up through this 125kW utility-scale tier, backed by genuine manufacturer warranty support.

Related reading — the rest of the Solis on grid range:

• Solis Single Phase Grid-Tied Inverter: S6-GR1P(1-3)K-M

• Solis Single Phase Grid-Tied Inverter: S6-GR1P(4-5)K-S

• Solis Three Phase Grid-Tied Inverter: S5-GR3P(5-20)K

• Solis Three Phase Grid-Tied Inverter: S5-GC(25-50)K

• Solis Three Phase Grid-Tied Inverter: S5-GC(50-60)K