Solis Grid-Tie Inverters

Solis Grid-Tie Inverters — Best Value in Residential & Commercial Solar

98.7% Maximum Efficiency — CEC-Weighted Excellence

Solis inverters achieve a maximum efficiency of 98.7% and a California Energy Commission (CEC) weighted efficiency of 98.5%, placing them among the most efficient inverters in their class. This translates to more kilowatt-hours harvested from the same array and faster payback periods for homeowners. The three-level T-type topology and advanced DSP control algorithm minimize switching losses and harmonic distortion, ensuring clean, grid-compliant AC output.

2-12 MPPT Channels — Maximum Flexibility for Complex Roofs

One of Solis's standout features is the wide range of MPPT configurations. The S5-GC(25-50)K series offers up to 12 independent MPPT channels, allowing large commercial arrays with multiple roof orientations, partial shading, and string length variations to operate at peak efficiency. Residential models from the S5-GR1P series provide 2-4 MPPTs, ideal for complex residential roofs with east-west facing panels. Each MPPT operates independently with a voltage range of 200-1000V, accommodating all modern module types including bifacial and high-voltage panels.

Free WiFi Monitoring with SolisCloud

Every Solis inverter includes a free WiFi monitoring dongle and lifetime access to SolisCloud, the manufacturer's cloud-based monitoring platform. SolisCloud provides real-time and historical production data, performance ratio analysis, and automated fault alerts via email and mobile app. The platform's fleet management tools are ideal for commercial installers who need to manage dozens or hundreds of sites from a single login. Unlike competitors who charge monthly subscription fees, SolisCloud is free for the life of the system.

5-20 Year Warranty Options

Solis inverters come with a 5-year standard warranty, which can be extended to 10, 15, or 20 years at the time of purchase. This flexibility allows budget-conscious buyers to minimize upfront costs while still offering long-term protection for premium installations. The warranty is backed by Ginlong's global service network and local US-based repair centers, ensuring fast turnaround times for any warranty claims.

Best Value at $100-150 per kW

In an industry where inverter prices can range from $200 to $500 per kW, Solis consistently delivers at $100-150 per kW — making it the go-to choice for price-sensitive projects where every dollar matters. Despite the lower price point, Solis does not compromise on quality: the company is a Tier 1 manufacturer according to BloombergNEF, and its inverters are certified to UL1741-SA, IEEE 1547, and IEC 62109 standards. For large commercial and utility projects, the cost savings of choosing Solis over premium brands can amount to tens of thousands of dollars.

Why Buy Solis from Portlandia Electric Supply?

• Authorized distributor with full manufacturer warranty support
• Competitive wholesale pricing at $100-150/kW — best value in the US market
• Stocked inventory of 3 kW to 255 kW models for immediate shipment
• Volume discounts and tiered pricing for large projects
• NET 30 terms available for approved Pro Account customers
• Free technical support for design, sizing, and commissioning
• Complete range of accessories: WiFi dongles, monitoring cables, and surge protectors