The repowering inverter. Adjustable AC voltage, current and power for maximum flexibility.

Sunny Highpower
PEAK3 FLEX Adjustable from 298-1500 VDC, 200-660VAC and 52-172 kW*

Repower with the PEAK3 FLEX.

Adjustable from 298-1500 VDC, 200-660VAC and 52-172 kW*, compact design

The Sunny Highpower PEAK3 FLEX offers best-in-class versatility with a module architecture that achieves a universal solution for both new utility-scale PV plants and repowering existing C&I and utility-scale PV power plants.

Adjustable Power Output: 52–172 kW
Flexible AC Voltage Settings: 200–660 VAC
298–1500 VDC operating range dependent on VAC
Adjustable AC Current: 0-151 Amps

*DC operating voltage range and AC power are dependent on AC voltage setting.

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For more information please contact insidesales@sma-america.com

Powering Performance

Created with flexibility in mind, explore how PEAK3 FLEX powers both repowering and new PV projects.

Unique Use Cases

Unique Use Cases Built for Performance

REPOWERING

As solar projects mature, it becomes inevitable that older PV power plants and their inverters will need replacement and upgrades to continue to achieve maximum efficiency. The PEAK3 FLEX is designed to repower both smaller string inverters and larger central inverters. The PEAK3 FLEX supports multiple use cases, including:

Asset owners managing a fleet of projects with varying DC and AC voltages
Developers upgrading older systems from 600 VDC or 1000 VDC to 1500 VDC
O&M providers seeking to retain transformers and AC balance-of-system components to avoid costly system restudies

Repower Today

NEW PV PROJECTS

As PV continues to saturate select markets, incentive programs and utilities are imposing strict AC nameplate limits. With a field-configurable UL Label, the PEAK3 FLEX offers the ability to customize the inverter’s AC power nameplate to meet project requirements. Already CEC-listed at numerous AC voltages, the PEAK3 FLEX is an excellent choice for new and existing PV projects.

Why choose the PEAK3 FLEX?

Shares the same attributes as the PEAK3 including:

25-year design life
OptiCool thermal management
High DC:AC ratios
ennexOS intelligent energy management, communications and controls
Unique adjustable AC output parameters for flexible system configuration
Compact design offering exceptional versatility for a wide range of projects

40+ years of solar expertise

SMA is a global leader in solar and energy solutions, offering PV and battery inverters, smart energy management and EV charging systems. The integrated solutions deliver long-lasting performance, high reliability and seamless connectivity. With over 144 GW of SMA inverters installed worldwide, we’ve helped prevent more than 64 million tons of CO₂ emissions. From residential to large-scale projects, SMA provides efficient, future-ready energy solutions backed by decades of expertise.

Installation and Commissioning

Due to the high-power density of the PEAK3 FLEX, replacing inverters in tight footprints is often achievable. With the ability to install the same way as the PEAK3, the steps to properly commission the PEAK3 FLEX are slightly different with its adjustable AC power, voltage and current outputs.

Commissioning Assistance for SMA America Home and Business Products

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Plant Design Architecture

Centralized designs with single MPPT string inverters at 1500 VDC have multiple benefits:

Lower AC line losses with shorter AC runs
Leverages higher DC:AC ratios
High-current & bifacial PV module friendly
Less cumbersome cable trenches
More convenient inverter O&M
Simplified communications cabling and troubleshooting

Sunny Portal powered by ennexOS

One platform for all PV systems
Remotely access, control and troubleshoot your power plant and PEAK3 FLEX inverters
Remotely configure PEAK3 FLEX inverters to enable static, limited, zero, dynamic active, or reactive power setpoints, minimizing truck rolls and ensuring compliance with utility parameter requirements

Sunny Portal