Solis Three Phase Grid-Tied Inverter: Solis-(215-255)K-EHV-5G

Everything below this tier in Solis's on-grid range runs on standard grid voltages, 400V, 415V, sometimes 480V on the HV variants. The Solis-(215-255)K-EHV-5G steps into genuinely different territory: an 800V grid connection, purpose-built for the largest utility-scale plants where cabling losses and step-up transformer stages actually start to matter at scale.

Why Extra High Voltage (EHV) Changes the Design

Running at a rated grid voltage of 800V, rather than the 400-480V range common across smaller commercial inverters, isn't a marketing distinction, it's a real engineering choice that reduces current for the same power output, which in turn cuts cabling losses and copper requirements across a large plant layout. For utility-scale ground-mount projects where cable runs between inverter and substation stretch across hundreds of meters, that difference compounds into real efficiency and cost savings that smaller-scale commercial projects never encounter.

Paired with a max input voltage of 1500V and MPPT voltage range up to 1500V, the EHV series is built to sit closer to the substation interconnection point in a large plant's electrical architecture, rather than requiring an intermediate step-up stage the way lower-voltage inverters typically do.

Fuse-Free by Design

One detail on this datasheet is worth calling out specifically: the series uses a fuse-free design, described as safe and maintenance-free. Fuses are a common wear-and-replacement point on large inverter installations, removing that failure mode outright reduces both the maintenance burden and the number of components that can fail across a plant running hundreds of these units. Combined with intelligent redundant fan-cooling, that's two separate design choices aimed squarely at minimizing unplanned service visits on a site where every visit has real logistics cost.

Specifications

Five Models, One Question: Which Fits Your Plant

The series ships as 215K-PLUS, 250K, 250K-PLUS, 255K, and 255K-PLUS, with output power scaling from 215kVA up to 255kVA and MPPT count varying from 9 to 14 depending on the model. The "PLUS" variants generally carry a different MPPT and string configuration than their standard counterparts at the same power rating, worth confirming against your specific string layout and module count with your EPC before finalizing a model, since two units rated at similar output power aren't necessarily interchangeable on the DC side.

Solis On-Grid Pricing and Availability

Pricing for the Solis-(215-255)K-EHV-5G depends on the model and project scope, so it isn't published here. Contact our team for a current quote, or view the full datasheet for the complete technical specification sheet.

Browse the rest of the Solis on-grid inverter range for other capacities. OSG Oriana India Pvt Ltd is the authorized PAN India distributor for Solis on-grid inverters, with genuine manufacturer warranty support across the full lineup.

Related reading:

• 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

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

• Solis Three Phase Grid-Tied Inverter: S6-GC3P(150-200)K07-ND