Taiwanese power electronics leader with utility-scale BESS inverters and power conversion systems. Known for high-efficiency designs and broad certifications across global markets.
US-based power electronics manufacturer offering bidirectional energy storage inverters for utility-scale and microgrid BESS. Industry-leading power density with grid-forming capability.
Leading American-made utility-scale PCS manufacturer using silicon carbide (SiC) technology for >99% efficiency. Designs and builds all products in the USA, targeting BESS, solar, microgrid, and grid-forming applications.
Austrian inverter manufacturer known for high-quality PCS for C&I and utility BESS. Tauro and Symo GEN24 platforms offer advanced grid support functions and seamless storage integration.
BloombergNEF Tier 1 inverter manufacturer offering string and central PCS for BESS from C&I to utility scale. Strong European market presence with rapidly expanding global distribution.
South Korean heavy industries conglomerate and BESS system integrator offering PCS and complete energy storage systems. Over 3 GWh delivered since 2009.
Chinese C&I energy storage specialist and BNEF Tier 1 manufacturer. China's #1 user-side energy storage integrator with over 1,000 projects and 20,000 eBlock units deployed.
Finnish power electronics company designing and manufacturing grid-forming BESS and STATCOM solutions. Arctic-grade systems operating down to -40 °C with 95-98% efficiency.
Chinese BESS manufacturer offering modular cabinet and container energy storage from 120 kWh to 5 MWh, standalone PCS, and smart microgrid controllers.
Leading German inverter manufacturer with dedicated utility-scale and C&I BESS power conversion solutions. Known for high efficiency, reliability, and European grid code compliance.
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Global energy technology company providing SINACON BESS systems from PCS to full AC block and SCADA. Targets utility-scale grid stability applications with turnkey solutions.
Modular PCS pioneer with over 10 years of BESS inverter experience and 12+ GW installed capacity globally. Produces grid-stabilizing PCS from 30 kW to 1.72 MW.
Chinese publicly listed smart energy company specializing in PV inverters and energy storage systems. Manufactures utility-scale PCS and battery containers (ORI series) as well as commercial and industrial integrated storage solutions.
German power electronics specialist, 100% owned by Siemens AG. Manufactures MW-scale central inverters, outdoor PCS, and MV skid solutions for utility-scale BESS.
Chinese cable and energy group offering utility-scale liquid-cooled BESS containers with self-developed integrated PCS. Active in energy storage since 2012.
Chinese BESS manufacturer specializing in PCS, battery packs, BMS, and complete energy storage systems. Top 10 Chinese utility-scale BESS OEM supplier with 100+ large-scale projects installed globally.
INGECON SUN STORAGE 350TL (346 kVA), INGECON SUN STORAGE M Series (4,540 kVA), INGECON SUN STORAGE C Series HV (3,928 kVA), INGECON SUN STORAGE 430 DC-DC (432 kW), INGECON SUN STORAGE 100TL (100 kW)
A PCS (power conversion system) converts DC from battery DC blocks into grid-compatible AC — and vice versa during charging. It is the interface between storage and grid, and defines the BESS capability for grid services: reactive power control, frequency support, fault ride-through, and increasingly grid-forming capabilities. For procurement teams, the PCS is the second-largest cost item after battery cells and is critical for conversion efficiency, grid compliance, and revenue flexibility.
PCS topologies fall into two main categories: central PCS (one large inverter per cluster) and string PCS (distributed inverters per DC block). Central topologies offer lower cost per MW, while string systems provide redundancy, independent MPPT, and simpler maintenance. The industry is moving toward grid-forming PCS capabilities, increasingly required by TSOs and grid codes.
Key Specifications
What to look for when evaluating PCS
When shortlisting for a BESS project, these are the key technical specifications that EPC contractors, project developers, and system integrators typically evaluate:
Power rating
125 kW – 7.5 MW
Higher power ratings per unit reduce system complexity. Choose based on project architecture (central vs. string) and required redundancy.
Conversion efficiency
>98%
Measured as peak efficiency at rated power. Higher efficiency directly improves round-trip efficiency and arbitrage revenue.
Topology
2-level, 3-level, modular
3-level topologies offer lower harmonic distortion and higher efficiency. Modular designs enable simpler maintenance and redundancy.
Grid support
Grid-forming & grid-following
Grid-forming PCS can independently set voltage and frequency — increasingly required by TSOs and grid codes for new BESS projects.
Cooling method
Liquid or air cooling
Liquid cooling enables higher power densities and more compact form factors. Air cooling is simpler and lower maintenance.
A PCS (power conversion system) is the power electronics that convert DC from the battery into grid-compatible AC, and vice versa. It controls charge and discharge operations, regulates active and reactive power, and provides grid services such as frequency support and fault ride-through. In utility-scale BESS, the PCS is a separate component; in AC blocks, it is integrated.
What is the difference between grid-forming and grid-following PCS?
A grid-following PCS synchronizes with the existing grid voltage via a phase-locked loop (PLL) and requires a stable grid to operate. A grid-forming PCS can independently set voltage and frequency, similar to a synchronous machine — it can operate independently and provides instantaneous reserve (synthetic inertia). Grid-forming capabilities are increasingly required by TSOs and grid codes as the share of inverter-based generation grows.
How does PCS efficiency affect BESS project returns?
PCS efficiency directly impacts the round-trip efficiency of the BESS — each percentage point of conversion loss reduces the energy available per cycle. For a 100 MW system, 1% lower efficiency reduces annual arbitrage revenue by several hundred thousand dollars. Higher efficiency also improves ancillary service revenue, as more usable power is available at the point of interconnection.
What is the difference between central and string PCS?
A central PCS connects multiple DC blocks to a single, large inverter. This design offers lower cost per MW but requires DC busbars and provides less redundancy. A string PCS assigns a dedicated inverter to each DC block. This provides redundancy (one PCS failure doesn't affect the entire system), enables independent control per string, and simplifies maintenance and augmentation.
