Sungrow Puts onsemi SiC Hybrid Modules in PowerTitan 3.0, and onsemi Pegs the 0.4% Inverter Gain at 475 MWh a Year

Power Electronics Product SiC & GaN Power Semiconductors Utility-Scale BESS
Marin Holt
October 18, 2026
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7 minutes read

Inverter-level efficiency gain (onsemi): 0.4%
Power conversion unit rating: up to 450 kW
Estimated annual savings, 100 MW installation (onsemi analysis): more than 475 MWh
Sungrow PowerTitan 3.0 deliveries, Europe 2026 (estimate): 10 GWh

Sungrow has put onsemi EliteSiC silicon carbide (SiC) hybrid power modules into its PowerTitan 3.0 battery storage platform. onsemi announced the design win on Oct. 14, 2026. The Scottsdale, Arizona, chipmaker says the new design raises inverter-level efficiency by 0.4% over the previous platform. It supports power conversion units rated up to 450 kW. onsemi estimates the gain would save more than 475 MWh a year in a 100 MW battery installation.

What Changed in the Power Conversion Stage

The change sits in the stage that turns battery DC into grid AC. PowerTitan 3.0 now uses high-density power integrated modules (PIMs) from onsemi. onsemi built these modules for three-level inverter designs in high-power storage.

The release lists peak efficiency above 99.3%. It also claims higher overload capability and better thermal performance. The two companies worked together on platform definition, system optimization and qualification. onsemi says the deal builds on a long-standing relationship with Sungrow.

Why It Matters

A storage owner pays conversion losses on every MWh the battery moves. A fraction of a percent adds up over a large fleet and many years. Sergio Fissore runs the IPD Power Division at onsemi. He said: “At utility scale, even small improvements in power conversion efficiency can have a meaningful impact on battery energy storage system (BESS) performance and total cost of ownership.”

Volume gives the deal its weight. Chen Peng leads the Energy Storage Conversion Product Line at Sungrow. He said Sungrow expects to deliver 10 GWh of PowerTitan 3.0 across Europe in 2026.

What the Announcement Does Not Say

The figure of more than 475 MWh of energy saved annually comes from onsemi analysis alone. The release does not state the cycling or duty assumptions behind it. Semiconductor Today repeats the number and credits it to onsemi analysis. Compound Semiconductor writes that the design “is said to” improve efficiency by 0.4 percent. Neither outlet tested the claim.

Peak efficiency exceeding 99.3% is a peak value, not an average across real loads. The release does not name the older module that sets the baseline. It gives no price. Sungrow estimates delivering 10 GWh of PowerTitan 3.0 in Europe only. The release gives no US volume.

Critical Perspective

The 475 MWh figure implies heavy use. At a 0.4% gain, the conversion stage has to move about 118,750 MWh a year to save 475 MWh. That equals a 100 MW site at full power for about 1,190 hours. That is more than three hours on every day of the year. The release does not say if onsemi counts charging, discharging or both. The duty assumption stays hidden. The installed base raises a second question. MGRID coverage of Spearmint Energy shows the older PowerTitan 2.0 at two 100 MW / 200 MWh ERCOT sites. Its Red Egret project uses 149 PowerTitan 2.0 units. The release describes PowerTitan 3.0 only, so nothing in it changes losses at those sites. Will onsemi publish the cycle count behind 475 MWh? And will US buyers of PowerTitan 3.0 get the same modules?