Deye SUN-25K-G05-AU 25kW Three Phase String Inverter 2 MPPT

Deye SUN-25K-G05-AU 25kW Three Phase String Inverter | 2 MPPT

25kW of conversion at 98.5% efficiency built for commercial-scale solar

The Deye SUN-25K-G05-AU is a three-phase string inverter engineered for commercial sites and large residential solar arrays that need to push serious output without wasting it in conversion. At 25kW rated AC output with up to 37.5kW of PV input and a maximum efficiency of 98.5%, it squeezes more usable electricity from every panel on the roof and with dual MPPT, it handles multiple string orientations and partial shading without dragging the whole system down.

For NZ solar installations where performance, return on investment, and long-term reliability matter, this is the inverter that sits at the heart of the system and does the heavy lifting for a decade.

98.5% maximum efficiency less waste, more power

Every percentage point of inverter efficiency matters at 25kW scale. The SUN-25K-G05-AU converts solar DC to grid-ready three-phase AC at up to 98.5% maximum efficiency (98% Euro efficiency), meaning almost nothing is lost in the process. Over the life of a commercial installation, that efficiency gap between a good inverter and an average one adds up to a meaningful amount of energy and money.

Key conversion specs:

• Rated AC output: 25kW
• Maximum PV input: 37.5kW (1.5× DC-to-AC ratio for oversized arrays)
• Maximum efficiency: 98.5%
• Euro efficiency: 98%
• MPPT efficiency: Over 99%

The 1.5× DC oversizing ratio means you can install up to 37.5kW of panels on a 25kW inverter, capturing more energy in the morning, evening, and overcast conditions when panels produce below their rated output a standard design strategy for maximising annual yield.

Dual MPPT independent optimisation of every string

Two independent Maximum Power Point Trackers manage separate panel strings, each optimising voltage and current independently. That matters in practice because:

• Different roof faces or tilt angles produce at different rates dual MPPT lets each string run at its own peak without one holding the other back
• Partial shading on one string doesn’t drag down the other
• Panel mismatch (different ages, types, or degradation) is handled per string
• Greater design flexibility — the installer can split the array across two orientations without efficiency compromise

For a commercial roof where the array wraps around multiple faces or encounters partial shading, dual MPPT is the difference between theoretical output and actual output.

Smart monitoring and remote management

The SUN-25K-G05-AU connects to Deye’s monitoring platform, giving you full visibility and control over the system from anywhere:

• Real-time performance monitoring — see generation, efficiency, and status live
• Remote parameter configuration — adjust settings without a site visit
• Remote shutdown — enhanced safety for maintenance or emergencies
• Firmware updates over the internet — keep the inverter current without a technician on-site
• Simplified O&M — faster diagnostics, lower maintenance costs

For commercial sites with multiple inverters or installations managed remotely, the monitoring platform turns maintenance from a reactive cost into a proactive process.

Built for NZ commercial and large residential solar

The SUN-25K-G05-AU is sized for the installations where output and efficiency directly affect the business case: commercial rooftops, large residential arrays, farms, schools, and industrial sites. Its three-phase output matches NZ commercial supply, and the 25kW capacity suits single-inverter installs or multi-inverter arrays on larger sites.

10-year manufacturer warranty

Backed by a 10-year warranty from Deye reflecting the build quality and the expectation that this inverter runs reliably for a decade-plus of daily cycling. For a commercial investment, that warranty protection matters.

Specifications

Ideal for

• Commercial rooftop solar — offices, retail, warehouses, factories
• Large residential arrays (three-phase homes)
• Agricultural and rural solar installations
• Schools, community buildings, and institutional solar
• Multi-inverter configurations on larger sites
• Any three-phase NZ installation needing high efficiency at 25kW scale

Why this inverter?

• 98.5% efficiency means almost nothing is lost in conversion
• Dual MPPT handles real-world roof conditions mixed orientations, shading, mismatch
• 37.5kW PV input supports DC oversizing for higher annual yield
• Remote monitoring and management cuts ongoing maintenance costs
• 10-year warranty protects the investment

For help specifying the right inverter for your commercial or large-scale residential solar project, talk to the Cybotix Energy team we’ll match the inverter to your array, your roof, and your energy goals.