The SMA Sunny Highpower PEAK3 series are grid-tie inverters specifically designed for large commercial and industrial installations, as well as solar farms. Key features include high power density in a compact housing, simplifying logistics and field installation, and active cooling OptiCool, ensuring stable operation even in demanding environmental conditions. The PEAK3 operates with an external DC Combiner Box architecture, making it easy to adapt the design to diverse terrain and expand later without reconfiguring the entire infrastructure.
Depending on the variant, configurations with one or multiple MPPTs are available - in practice, this means better optimization of yields when chains have different orientations or partial shading occurs. High European efficiency translates to lower losses under typical operating conditions in Poland, delivering more energy to the grid annually.
Monitoring and communication are handled by Ethernet and integration with Sunny Portal powered by ennexOS and Data Manager, enabling remote diagnostics and Modbus/TCP integration. This series is not hybrid - it does not directly work with DC energy storage systems, but it performs excellently in projects focused on stable, grid-connected generation. An additional advantage is its long design lifespan and the possibility of extending the warranty up to 25 years.
Ranking
Specifications
Pros and cons
The official datasheet (SHP-21-DS) specifies a peak efficiency of 98.8-99.2% depending on the variant, placing the series among the leading commercial inverters in the 100-180 kW class. For reference, the Sungrow SG250HX is rated at up to 98.9% and the Huawei SUN2000-215KTL-H3 at 99.0%; the PEAK3 thus matches that performance level while leveraging a proven European architecture.
1500 V DC support enables the design of longer PV strings (fewer strings, less DC cabling), directly reducing BoS costs and installation time on utility-scale sites - the industry standard for projects above 1 MWp since 2019, which the PEAK3 meets in full.
The manufacturer confirms a 25-year design life and offers warranty extensions up to 25 years - unique in the >100 kW inverter class. Most Chinese competitors provide a standard 5- or 10-year factory warranty, with paid extensions available up to 20 years.
SMA's proprietary OptiCool technology dynamically regulates airflow based on load and ambient temperature, reducing thermal derating on hot days and extending capacitor service life. The solution has been field-deployed since 2018 and is documented in installations across Mediterranean and subtropical climates.
Native integration with Sunny Portal powered by ennexOS and built-in Modbus/TCP support enable SCADA deployment without additional communication gateways. The SMA Data Manager M can aggregate up to 150 inverters per node - a significant advantage for utility-scale farms in the 5-50 MWp segment.
Standard variants of the series (SHP 100-180-20/21) feature a single MPPT tracker. For plants with varied array orientations or partial shading, this requires designing uniform DC fields - less flexible than, for example, the Sungrow SG250HX (2 MPPTs) or the Huawei SUN2000-215KTL-H3 (12 MPPTs). The DC Combiner Box architecture partially compensates for this limitation, but at the cost of additional infrastructure.
Unlike typical string inverters (e.g., Huawei SUN2000, Fronius Symo GEN24), the PEAK3 does not accept string inputs directly - external DC combiner boxes are required. This increases BoS costs by approximately 2-4% of the total installed value and extends commissioning time during field wiring.
As a German Tier-1 manufacturer, SMA positions the PEAK3 above the segment's price median set by Sungrow and Huawei, which together account for approximately 55% of the global inverter market (BNEF/Wood Mackenzie 2024). The equipment purchase price differential is estimated at 15-25% in favor of Chinese competitors - a significant factor in EPC projects under CAPEX pressure.
Alternatives
About the Sunny Highpower PEAK3 series
These answers cover the whole series. Where a figure differs, the specification above is this model's own.