The SolarEdge Synergy series comprises three-phase grid-tie inverters specifically designed for large commercial and industrial installations, where rapid deployment, high availability, and safety are key priorities. Its distinguishing feature is the modular design-the inverter consists of multiple independently operating Synergy units and a master management module, facilitating service and minimizing downtime during failures. In conjunction with SolarEdge power optimizers, the system achieves module-level maximum power point tracking (MPPT), effectively functioning as multiple MPPT units-aiding performance during shading, varying roof tilts, and uneven module aging. High European efficiency ensures superior energy production under typical operating conditions in Poland, beyond laboratory settings. Monitoring is accessible via the portal and application (SetApp), and communication can be achieved through Ethernet or remote solutions. Notable built-in safety features include, among others, DC voltage reduction (SafeDC) and arc detection. The series is designed for commercial and industrial (C&I) applications and requires a SolarEdge architecture with optimizers-typically paired with dedicated SolarEdge energy storage solutions.
Ranking
Specifications
Pros and cons
The inverter consists of three independent Synergy units - a failure in one does not interrupt production from the remaining units. Servicing involves replacing a single module without disconnecting the entire installation, minimizing downtime at C&I sites where every hour of lost production translates directly to revenue loss.
According to the official EU datasheet (models SE66.6K-SE120K for 400 V grids), European efficiency is 98%, with a peak of 98.3%. Under typical Polish irradiance conditions - characterized by a high proportion of partial-load hours - the EU weighted efficiency figure is a direct indicator of real annual energy yield, outperforming competitors that achieve 97-97.5% EU efficiency.
SafeDC automatically reduces DC voltage to ~1 V at the optimizer level upon grid disconnection, certified to IEC/EN 60947-1, IEC/EN 60947-3, and VDE AR 2100-712. The integrated Arc-Fault Circuit Interrupter (AFCI) instantly interrupts production at the module level - a critical safety feature for industrial facilities subject to enhanced fire protection requirements.
The ability to connect DC capacity up to 175% of the inverter's AC rating reduces the levelized cost of the investment and optimizes energy yield during morning and evening hours. SetApp enables full system verification - wiring, DC polarity, communications - from a smartphone prior to grid connection, shortening commissioning time and reducing first-startup service costs.
In a SolarEdge optimizer-based architecture, each module operates at its own independent maximum power point. For complex C&I installations with multiple roof sections, varying orientations, or partial shading - such as from HVAC equipment - this delivers measurably higher energy yield compared to string inverters with 2-4 MPPT inputs at the inverter level.
SolarEdge conducted four rounds of layoffs in 2024-2025 (approximately 2,200 positions in total), shut down its energy storage division, reported a ~64% year-over-year revenue decline in Q3 2024, and replaced both its CEO and CFO. For C&I installations backed by 12-20 year warranties, this represents a tangible long-term risk to warranty support continuity and spare-parts availability.
The Synergy series requires SolarEdge power optimizers exclusively - it is incompatible with third-party solutions such as Tigo or Huawei SolarMate. The cost of power optimizers (typically 100-150 PLN per unit) significantly increases total system CAPEX compared to string inverters without optimizers, such as the Fronius Tauro or SMA STP 50-150. Any future system upgrade or expansion leaves the customer fully dependent on SolarEdge pricing.
Alternatives
About the SolarEdge Synergy series
These answers cover the whole series. Where a figure differs, the specification above is this model's own.